PBDB Taxon

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Hadrosauridae (hadrosaurid)

Reptilia - Hadrosauridae

Taxonomy

Hadrosauridae was named by Cope (1869). Its type is Hadrosaurus. It was considered monophyletic by Kobayashi et al. (2021).

It was synonymized subjectively with Trachodontidae by Lydekker (1888), Marsh (1895), Marsh (1896), Hay (1902), Hatcher (1902), Matthew (1915), Nagao (1936) and Nagao (1939); it was reranked as the subfamily Hadrosauridae by Nopcsa (1901); it was synonymized subjectively with Trachydontidae by Mansel-Pleydell (1902); it was synonymized subjectively with Trachyodontidae by Sauvage (1909); it was reranked as the unranked clade Hadrosauridae by Prieto-Márquez (2010), Campione and Evans (2011) and Verdú et al. (2021).

It was assigned to Ornithopoda by Zittel (1890); to Orthopoda by Cope (1869), Cope (1870), Cope (1871), Cope (1875), Cope (1883), Cope (1883), Cope (1891) and Cope (1898); to Hadrosauridae by Nopcsa (1901); to Postpubici by Jaekel (1911); to Phytophagi by Jaekel (1914); to Predentata by Gilmore (1919); to Iguanodontoidae by Hay (1930); to Dinosauria by Rapp (1944); to Brachypoda by Thulborn (1974) and Thulborn (1977); to Ornitophoda by Bonaparte (1978); to Ornithischia by Madsen and Miller (1979); to Dryosauroidea by Norman (1984); to Ornithopoda by Dollo (1882) and Bakker (1986); to Styracosterna by Benton (1990); to Hadrosauria by Huene (1959) and Horner (1990); to Iguanodontia by Baur (1891), Russell (1984), Norman (1989) and Forster (1997); to Iguanodontia by Norman and Sues (2000); to Ornithischia by Eberth et al. (2001); to Iguanodontoidea by Casamiquela (1964), Cooper (1985) and Norman (2004); to Hadrosauriformes by You et al. (2005); to Ornithopoda by Sauvage (1882), Marsh (1882), Dollo (1884), Marsh (1884), Marsh (1885), Winkler (1893), Russell (1930), Lull and Wright (1942), Sternberg (1953), Sternberg (1954), Miller (1955), Romer (1956), Parsch (1963), Tatarinov (1964), Kuhn (1964), Estes (1964), Kuhn (1966), Romer (1966), Charig (1967), Miller (1967), Swinton (1970), Thulborn (1970), Haubold (1971), Rozhdestvensky (1977), Baird and Horner (1979), Dong (1979), Benton (1979), Ostrom (1980), McIntosh (1981), Thurmond and Jones (1981), Weishampel and Weishampel (1983), Milner and Norman (1984), Norman (1984), Carroll (1988), Nessov (1995), Peng et al. (2001), Martinelli and Forasiepi (2004) and Apesteguía et al. (2012); to Ornithopoda by Van Den Broeck (1900) and Coria et al. (2012); to Iguanodontia by Prieto-Márquez et al. (2019); to Hadrosauroidea by Sereno (1986), Horner (1992), Hunt and Lucas (1993), Sereno (1997), Sereno (1998), Godefroit et al. (1998), Sereno (1999), Casanovas et al. (1999), You et al. (2003), Godefroit et al. (2004), Bolotsky and Godefroit (2004), Prieto-Márquez et al. (2006), Prieto-Márquez et al. (2006), Godefroit et al. (2008), Pereda-Suberbiola et al. (2009), Sues and Averianov (2009), McDonald et al. (2010), Prieto-Marquez and Salinas (2010), Prieto-Márquez and Wagner (2010), Ramírez-Velasco et al. (2012) and Zhang et al. (2019); to Hadrosauromorpha by Norman (2014) and Verdú et al. (2021); to Hadrosauroidea by Dalla Vecchia (2009), Prieto-Márquez (2010), McDonald (2012), Prieto-Márquez (2012), Tan et al. (2015), Cruzado-Caballero and Powell (2017), Takasaki et al. (2019), Dalla Vecchia (2020) and Kobayashi et al. (2021); and to Ornithopoda by Le Loeuff (1998), Cruzado-Caballero et al. (2010), Campione and Evans (2011), Freedman Fowler and Horner (2015), Kobayashi et al. (2019) and Ibiricu et al. (2021).

Synonyms

Tyrannosauropus was named by Haubold (1971). It is considered to be a form taxon. Its type is Tyrannosauropus petersoni.

It was considered a nomen dubium by Lockley and Hunt (1994); it was considered a nomen dubium by Manning et al. (2008) and Romilio and Salisbury (2014).

It was assigned to Tyrannosauroidea by Haubold (1971); to Carnosauria by Haubold (1974) and Thulborn and Wade (1984); and to Theropoda by Romero Molina et al. (2003).
Tyrannosauropus petersoni was named by Haubold (1971). It is considered to be a form taxon. It is a trace fossil. Its type locality is Castle Gate No. 1 mine tracksite, which is in a Campanian terrestrial sandstone/coal in the Castlegate Formation of Utah. It is the type species of Tyrannosauropus.

It was considered a nomen dubium by Lockley and Hunt (1994) and Manning et al. (2008).
Willinakaqe was named by Juárez Valieri et al. (2010).

It was considered a nomen vanum by Cruzado-Caballero and Coria (2016); it was considered a nomen vanum by Cruzado-Caballero and Powell (2017).

It was assigned to Saurolophidae by Juárez Valieri et al. (2010); to Hadrosauridae by Apesteguía et al. (2012); and to Kritosaurini by Prieto-Marquez (2013), Lehman et al. (2016) and Bertozzo et al. (2017).
Willinakaqe salitralensis was named by Juárez Valieri et al. (2010). Its type specimen is MPCA-Pv SM 8, a partial skull (right premaxilla), and it is a 3D body fossil. Its type locality is Salitral Moreno (NH1) [MPCA], which is in a Campanian/Maastrichtian fluvial sandstone/sandstone in the Allen Formation of Argentina.

It was considered a nomen vanum by Cruzado-Caballero and Coria (2016); it was considered a nomen dubium by Cruzado-Caballero (2016); it was considered a nomen vanum by Cruzado-Caballero and Powell (2017).
Cinodon was named by Cope (1874). Its type is Cinodon arctatus.

It was corrected as Cionodon by Cope (1875), Dollo (1882), Sauvage (1882), Marsh (1882), Cope (1883), Dollo (1884), Marsh (1884), Marsh (1885), Zittel (1890), Marsh (1895), Marsh (1896), Nopcsa (1900), Nopcsa (1901), Hay (1902), Lambe (1905), Sauvage (1909), Huene (1909), von Zittel (1911), Hay (1930), Kuhn (1964), Chapman and Brett-Surman (1990) and Ryan (1997); it was synonymized subjectively with Trachodon by Hatcher (1902); it was synonymized subjectively with Thespesius by Romer (1956), Tatarinov (1964) and Romer (1966); it was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Dinosauria by Cope (1874) and Cope (1875); to Madrosauridae by Sauvage (1882); to Hadrosauridae by Nopcsa (1901); to Trachyodontidae by Sauvage (1909); to Trachodontidae by Marsh (1895), Marsh (1896), Hay (1902), Lambe (1905), Huene (1909) and von Zittel (1911); to Hadrosaurinae by Hay (1930); and to Hadrosauridae by Cope (1874), Dollo (1882), Marsh (1882), Cope (1883), Dollo (1884), Marsh (1884), Marsh (1885), Zittel (1890), Nopcsa (1900), Kuhn (1964), Chapman and Brett-Surman (1990) and Ryan (1997).
Orthomerus was named by Seeley (1883). Its type is Orthomerus dolloi.

It was synonymized subjectively with Telmatosaurus by Mulder (1984) and Chapman and Brett-Surman (1990); it was considered a nomen dubium by Brinkmann (1988); it was considered a nomen dubium by Weishampel and Horner (1990); it was considered a nomen dubium by Casanovas et al. (1999), Horner et al. (2004), Dalla Vecchia (2006) and Godefroit and Motchurova-Dekova (2010).

It was assigned to Hadrosauridae by Nopcsa (1901); to Trachyodontidae by Sauvage (1909); to Trachodontidae by Lydekker (1888), Huene (1909) and von Zittel (1911); to Protrachodontinae by Huene (1927) and Nopcsa (1928); to Protrachodontidae by Nopcsa (1915), Nopcsa (1923), Lapparent (1947) and Huene (1948); to Iguanodontidae by Lapparent (1948); to Prohadrosaurinae by Young (1958) and Casamiquela (1964); to Hadrosaurinae by Weishampel and Weishampel (1983), Casanovas-Cladellas et al. (1985), Casanovas-Cladellas et al. (1986) and Casanovas et al. (1987); and to Hadrosauridae by Dollo (1884), Zittel (1890), Nopcsa (1900), Van Den Broeck (1900), Romer (1956), Tatarinov (1964), Kuhn (1964), Campbell (1966), Romer (1966), Charig (1967), Thulborn (1974), Buffetaut et al. (1980), Brinkmann (1984), Buffetaut et al. (1985), Carroll (1988), Buffetaut (1992), Grigorescu (1992), Le Loeuff and Buffetaut (1995), Casanovas-Cladellas et al. (1995) and Le Loeuff (1998).
Hypsibema was named by Cope (1869).

It was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen dubium by Miller (1967); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Dinosauria by Cope (1870) and Cope (1875); to Hadrosauridae by Nopcsa (1901); to Stegosauridae by Zittel (1890) and Hay (1902); to Trachodontidae by Huene (1909) and von Zittel (1911); to Hadrosaurinae by Hay (1930); to Hadrosauridae by Cope (1883), Nopcsa (1900), Romer (1956), Tatarinov (1964), Kuhn (1964), Romer (1966) and Thulborn (1974); and to Sauropoda by Baird and Horner (1979) and Russell (1984).
Claosauridae was named by Marsh (1890). It is not extant. Its type is Claosaurus.

It was reranked as the subfamily Claosauridae by Nopcsa (1901); it was synonymized subjectively with Iguanodontidae by Hay (1902); it was synonymized subjectively with Trachodontidae by Hatcher (1902); it was synonymized subjectively with Hadrosauridae by Kuhn (1964) and Kuhn (1966).

It was assigned to Ornithopoda by Marsh (1890), Marsh (1895) and Marsh (1896); and to Hadrosauridae by Nopcsa (1901).
Trachodon was named by Leidy (1856). It is the type genus of Trachodontinae.

It was synonymized subjectively with Hadrosaurus by Zittel (1890) and Nopcsa (1901); it was synonymized subjectively with Anatosaurus by Gabriel and Lupton (1980); it was considered a nomen dubium by Swinton (1970); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Lacertilia by Leidy (1856); to Sauria by Leidy (1860); to Iguanodontidae by Lucas (1904); to Trachyodontidae by Sauvage (1909); to Orthopoda by Cope (1877) and Joleaud (1922); to Trachodontinae by Tornier (1913), Brown (1914) and Nopcsa (1928); to Hadrosaurinae by Hay (1930) and Lull and Wright (1942); to Lambeosaurinae by Sternberg (1936), Sternberg (1953) and Sternberg (1954); to Trachodontidae by Lydekker (1888), Marsh (1895), Marsh (1896), Hay (1902), Hatcher (1902), Lambe (1905), Huene (1909), Lambe (1911), von Zittel (1911), Brown (1914), Nopcsa (1915), Matthew (1915), Gilmore (1915), Lull (1924), Huene (1927) and Bataller (1960); and to Hadrosauridae by Van Den Broeck (1900), Russell (1930), Romer (1956), Tatarinov (1964), Kuhn (1964), Romer (1966), Charig (1967), Thulborn (1974), Taquet (1975) and Madsen and Miller (1979).
Trachodontidae was named by Lydekker (1888). It is not extant.

It was synonymized subjectively with Hadrosauridae by Lambe (1917), Lambe (1918), Gilmore (1919), Lambe (1920), Hay (1930), Sternberg (1936), Lull and Wright (1942), Romer (1956), Tatarinov (1964), Kuhn (1964), Kuhn (1966), Romer (1966) and Brambilla (1972).

It was assigned to Iguanodontoidea by Hay (1902); to Dinosauria by Sauvage (1909); to Orthopoda by Lambe (1905) and Lambe (1911); to Ornithopodidae by von Zittel (1911); to Predentata by Gilmore (1916) and Parks (1920); to Iguanodontia by Osborn (1923); to Ornithopoda by Huene (1927); to Ornithopoidea by Nopcsa (1928); to Ornithopodoidea by Nopcsa (1929), Huene (1934) and Huene (1934); to Ornithischia by Parks (1935); to Ornithopoda by Lydekker (1888), Marsh (1890), Marsh (1896), Mansel-Pleydell (1902), Arldt (1909), Huene (1909), Huene (1914), Matthew (1915), Nopcsa (1923), Lull (1924), Roxo (1937), Kuhn (1946) and Lapparent (1947); and to Trachodontoidea by Huene (1948).
Microhadrosaurus was named by Dong (1979). Its type is Microhadrosaurus nanshiungensis.

It was considered a nomen dubium by Weishampel and Horner (1990); it was considered a nomen dubium by Horner et al. (2004).

It was assigned to Hadrosauridae by Dong (1979) and Chapman and Brett-Surman (1990); and to Hadrosaurinae by Dong (1992).
Cinodon arctatus was named by Cope (1874). Its type specimen is AMNH 3951 and is a 3D body fossil. Its type locality is Bijou Creek (USG&GS), which is in a Maastrichtian terrestrial horizon in the Laramie Formation of Colorado. It is the type species of Cionodon.

It was recombined as Cionodon arctatus by Cope (1875), Cope (1875), Cope (1875), Sauvage (1876), Cope (1877), Cope (1883), Nopcsa (1900), Nopcsa (1901), Hay (1902), Sauvage (1909), Hay (1930) and Kuhn (1964); it was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).
Diclonius was named by Cope (1876).

It was synonymized subjectively with Hadrosaurus by Marsh (1884), Marsh (1885), Zittel (1890) and Nopcsa (1901); it was synonymized subjectively with Trachodon by Marsh (1895), Marsh (1896), Hay (1902), Hatcher (1902), von Zittel (1911), Tornier (1913) and Huene (1927); it was synonymized subjectively with Thespesius by Romer (1956), Tatarinov (1964) and Romer (1966); it was considered a nomen dubium by Lull and Wright (1942); it was considered a nomen dubium by Coombs (1988), Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Orthopoda by Cope (1877); to Ornithopoda by Dollo (1885); to Ornithopoda by Gadow (1897); to Ornithopoda by Gadow (1898) and Gadow (1901); to Trachodontidae by Lydekker (1888) and Huene (1909); to Hadrosaurinae by Lambe (1918) and Lambe (1920); and to Hadrosauridae by Cope (1876), Cope (1883), Cope (1883), Cope (1883), Dollo (1884), Lambe (1917) and Kuhn (1964).
Thespesius was named by Leidy (1856). Its type is Thespesius occidentalis.

It was synonymized subjectively with Hadrosaurus by Cope (1875), Zittel (1890) and Nopcsa (1901); it was synonymized subjectively with Trachodon by Hatcher (1902) and von Zittel (1911); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Sauria by Leidy (1860); to Iguanodontidae by Hay (1902); to Trachodontidae by Versluys (1910), Gilmore (1915) and Huene (1927); to Trachodontinae by Nopcsa (1928); to Hadrosaurinae by Gilmore (1924), Gilmore (1924), Hay (1930), Gilmore (1933), Nagao (1936), Sternberg (1936), Lull and Wright (1942), Sternberg (1953), Sternberg (1954), Young (1958) and Casamiquela (1964); and to Hadrosauridae by Moodie (1926), Russell (1930), Romer (1956), Tatarinov (1964), Kuhn (1964), Romer (1966), Charig (1967), Thulborn (1974) and Madsen and Miller (1979).
Thespesius occidentalis was named by Leidy (1856). Its type specimen is USNM 219-221 and is a 3D body fossil. Its type locality is between Moreau and Grand Rivers (USGS), which is in a Maastrichtian terrestrial horizon in the Lance Formation of South Dakota. It is the type species of Thespesius.

It was recombined as Hadrosaurus occidentalis by Cope (1869), Cope (1871), Cope (1874), Cope (1875), Cope (1875), Nopcsa (1900) and Nopcsa (1901); it was considered a nomen dubium by Sternberg (1926); it was considered a nomen dubium by Weishampel and Horner (1990), Breithaupt (1999) and Horner et al. (2004).
Hadrosaurus minor was named by Marsh (1870). Its type specimen is YPM 1600, a set of vertebrae, and it is a 3D body fossil. Its type locality is West Jersey Marl Company's Pit, Barnsboro (New Egypt), which is in a Maastrichtian terrestrial sandstone/marl in the New Egypt Formation of New Jersey.

It was recombined as Trachodon minor by Hay (1902) and Huene (1927); it was recombined as Edmontosaurus minor by Baird and Horner (1977), Gallagher (1984) and Baird (1986); it was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen nudum by Langston (1960); it was considered a nomen dubium by Weishampel and Horner (1990), Horner et al. (2004), Weishampel (2006), Lund and Gates (2006) and Prieto-Márquez et al. (2006).
Diclonius perangulatus was named by Cope (1876). Its type specimen is AMNH 5737, a tooth, and it is a 3D body fossil.

It was recombined as Hadrosaurus perangulatus by Nopcsa (1901); it was recombined as Trachodon perangulatus by Hay (1902) and Hay (1930); it was misspelled as Trachodon perangulus by Huene (1927); it was considered a nomen dubium by Lull and Wright (1942); it was considered a nomen dubium by Coombs (1988), Weishampel and Horner (1990) and Horner et al. (2004).
Diclonius calamarius was named by Cope (1876). Its type specimen is AMNH 5733 and is a 3D body fossil.

It was recombined as Hadrosaurus calamarius by Nopcsa (1901); it was recombined as Trachodon calamarius by Hay (1902), Huene (1927) and Hay (1930); it was considered a nomen dubium by Lull and Wright (1942); it was considered a nomen dubium by Coombs (1988), Weishampel and Horner (1990) and Horner et al. (2004).
Microhadrosaurus nanshiungensis was named by Dong (1979). Its type specimen is IVPP V.4732, a mandible, and it is not a trace fossil. Its type locality is Dayou Mountain, Nanxiong Basin (PROXY), which is in a Maastrichtian terrestrial horizon in China. It is the type species of Microhadrosaurus.

It was considered a nomen dubium by Weishampel and Horner (1990), Horner et al. (2004) and Mo et al. (2007).
Trachodon (Pteropelyx) marginatus was named by Lambe (1902). Its type specimen is NMC 419, a partial skeleton, and it is a 3D body fossil.

It was recombined as Trachodon marginatus by Lambe (1905), Lambe (1911), Brown (1913), Lambe (1913), Bach (1914), Brown (1914), Lambe (1914), Brown (1916), Versluys (1923) and Huene (1927); it was recombined as Stephanosaurus marginatus by Lambe (1914), Brown (1914), Lambe (1914), Lambe (1915), Lambe (1916), Gilmore (1917), Sternberg (1918) and Moodie (1930); it was recombined as Kritosaurus marginatus by Gilmore (1924), Hay (1930), Russell (1930), Kuhn (1964) and Russell (1964); it was synonymized subjectively with Lambeosaurus lambei by Russell (1940), Russell (1946) and Currie (2005); it was considered a nomen dubium by Lull and Wright (1942), Weishampel and Horner (1990), Hunt and Lucas (1992), Horner et al. (2004) and Lund and Gates (2006).
Neosaurus was named by Gilmore and Stewart (1945). It is not extant.

It was replaced with Parrosaurus by Gilmore (1945), Romer (1956), Tatarinov (1964), Romer (1966) and Steel (1970); it was synonymized subjectively with Hypsibema by Baird and Horner (1979).

It was assigned to Camarasauridae by Gilmore and Stewart (1945).
Neosaurus missouriensis was named by Gilmore and Stewart (1945). Its type specimen is USNM 16735, a set of vertebrae (13 caudal centra and two unidentified fragments), and it is a 3D body fossil. Its type locality is Chronister Site, which is in a Santonian/Campanian karst claystone in Missouri.

It was recombined as Parrosaurus missouriensis by Gilmore (1945) and Steel (1970); it was recombined as Hypsibema missouriense by Baird and Horner (1979) and Stinchcomb et al. (1994); it was recombined as Hypsibema missouriensis by Salgado and Calvo (1993); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).
Parrosaurus was named by Gilmore (1945).

It was synonymized objectively with Hypsibema by Baird and Horner (1979) and Stinchcomb et al. (1994); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Sauropoda by Tatarinov (1964); to Brachiosauridae by Romer (1966); and to Titanosaurinae by Romer (1956) and Steel (1970).
Hadrosaurus breviceps was named by Marsh (1889). Its type specimen is YPM 1779 and is a 3D body fossil. Its type locality is Bearpaw Mountains (PROXY), which is in a Campanian/Campanian terrestrial horizon in the Judith River Formation of Montana.

It was recombined as Trachodon breviceps by Marsh (1896), Hay (1902), von Zittel (1911), Huene (1927) and Hay (1930); it was recombined as Kritosaurus breviceps by Lull and Wright (1942), Vialli (1960), Kuhn (1964) and Wolberg (1980); it was considered a nomen dubium by Weishampel and Horner (1990), Hunt and Lucas (1992), Horner et al. (2004), Lund and Gates (2006) and Prieto-Márquez et al. (2006).
Hadrosaurus cavatus was named by Cope (1871). Its type specimen is AMNH 1390 and is a 3D body fossil. Its type locality is Swedesboro (Navesink), which is in a Maastrichtian terrestrial sandstone in the Navesink Formation of New Jersey.

It was recombined as Trachodon cavatus by Hay (1902) and Huene (1927); it was synonymized subjectively with Edmontosaurus minor by Gallagher (1984); it was considered a nomen dubium by Weishampel and Horner (1990), Horner et al. (2004), Lund and Gates (2006) and Prieto-Márquez et al. (2006); it was synonymized subjectively with Hadrosaurus foulkii by Baird and Horner (1977) and Weishampel (2006).
Ornithotarsus was named by Cope (1869). Its type is Ornithotarsus immanis. It is the type genus of Ornithotarsidae.

It was synonymized subjectively with Trachodon by Hatcher (1902); it was synonymized subjectively with Hadrosaurus by Baird and Horner (1977), Weishampel and Horner (1990), Horner et al. (2004) and Weishampel (2006); it was considered a nomen dubium by Prieto-Márquez et al. (2006) and Brownstein (2021).

It was assigned to Symphypoda by Cope (1869), Cope (1869) and Cope (1869); to Symphypoda by Cope (1870); to Ornithotarsidae by Cope (1871) and Cope (1875); to Hadrosauridae by Nopcsa (1901); to Trachyodontidae by Sauvage (1909); to Trachodontidae by Marsh (1896), Hay (1902), Huene (1909), von Zittel (1911) and Huene (1927); to Hadrosaurinae by Hay (1930) and Lull and Wright (1942); and to Hadrosauridae by Zittel (1890), Nopcsa (1900), Russell (1930), Rapp (1944), Miller (1955), Romer (1956), Tatarinov (1964), Kuhn (1964), Romer (1966), Thulborn (1974) and Chapman and Brett-Surman (1990).
Trachodon (Pteropelyx) selwyni was named by Lambe (1902). Its type specimen is NMC 290, a set of teeth, and it is a 3D body fossil.

It was recombined as Trachodon selwyni by Lambe (1905), Lambe (1911), Brown (1914), Versluys (1923), Huene (1927), Hay (1930) and Kuhn (1964); it was recombined as Gryposaurus selwyni by Lambe (1914); it was recombined as Corythosaurus selwyni by Russell (1930); it was considered a nomen dubium by Lull and Wright (1942), Weishampel and Horner (1990), Horner et al. (2004) and Currie (2005).
Claorhynchus was named by Cope (1892). Its type is Claorhynchus trihedrus.

It was synonymized subjectively with Trachodon by Hatcher (1902); it was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).

It was assigned to Agathaumidae by Cope (1892); to Ceratopsidae by Hay (1902); to Trachodontidae by Hatcher et al. (1907), Huene (1909) and von Zittel (1911); to Hadrosaurinae by Hay (1930); and to Hadrosauridae by Romer (1956), Tatarinov (1964), Kuhn (1964), Romer (1966) and Thulborn (1974).
Claorhynchus trihedrus was named by Cope (1892). Its type specimen is AMNH 3978, a partial skull, and it is a 3D body fossil. It is the type species of Claorhynchus.

It was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).
Trachodon mirabilis was named by Leidy (1856). Its type specimen is ANSP 9620, a set of teeth, and it is a 3D body fossil. Its type locality is Judith River badlands (USGS), which is in a Campanian/Campanian terrestrial horizon in the Judith River Formation of Montana.

It was recombined as Hadrosaurus mirabilis by Cope (1869), Leidy (1870), Cope (1874), Cope (1875), Cope (1875), Zittel (1890), Boule (1891), Winkler (1893), Nopcsa (1900), Nopcsa (1901), Gadow (1901), Hay (1910) and Perrier (1928); it was recombined as Diclonius mirabilis by Cope (1883), Cope (1883), Cope (1884), Hulke (1884), Cope (1885), Cope (1886), Seeley (1887), Cope (1889), Cope (1891), Lambe (1917), Gilmore (1924) and Riabinin (1930); it was considered a nomen dubium by Tatarinov (1964); it was considered a nomen dubium by Swinton (1970); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).
Saurolophus krystofovici was named by Riabinin (1930). It is a 3D body fossil. Its type locality is Jiayin, which is in a Maastrichtian floodplain sandstone/mudstone in the Yuliangzi Formation of China.

It was considered a nomen dubium by Gilmore (1933); it was misspelled as Saurolophus krischtofovici by Young (1935) and Young (1944); it was considered a nomen nudum by Rozhdestvensky (1952); it was considered a nomen dubium by Young (1958); it was considered a nomen dubium by Maryanska and Osmólska (1981), Weishampel and Horner (1990), Norman and Sues (2000), Godefroit et al. (2000), Horner et al. (2004), Lund and Gates (2006), Bell (2011), Godefroit et al. (2011) and Godefroit et al. (2012).
Cionodon stenopsis was named by Cope (1875). Its type specimen is AMNH uncatalogued and is a 3D body fossil. Its type locality is Milk River, which is in a Maastrichtian terrestrial horizon in the Frenchman Formation of Canada.

It was considered a nomen nudum by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).
Pteropelyx was named by Cope (1889).

It was synonymized subjectively with Claosaurus by Nopcsa (1901) and Huene (1909); it was reranked as Trachodon (Pteropelyx) by Lambe (1902); it was synonymized subjectively with Trachodon by Hatcher (1902); it was synonymized subjectively with Thespesius by Romer (1956), Tatarinov (1964) and Romer (1966); it was considered a nomen dubium by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004); it was synonymized subjectively with Corythosaurus by Lund and Gates (2006).

It was assigned to Iguanodontidae by Hay (1902); to Trachodon by Lambe (1902); to Hadrosaurinae by Hay (1930); and to Hadrosauridae by Kuhn (1964).
Pteropelyx grallipes was named by Cope (1889). Its type specimen is AMNH 3971 and is a 3D body fossil. Its type locality is Cow Island, which is in a Campanian/Campanian terrestrial horizon in the Judith River Formation of Montana.

It was synonymized subjectively with Claosaurus annectens by Nopcsa (1900) and Nopcsa (1901); it was considered a nomen dubium by Lull and Wright (1942); it was considered a nomen dubium by Weishampel and Horner (1990) and Horner et al. (2004).
Trachodon (Pteropelyx) altidens was named by Lambe (1902). Its type specimen is NMC 1092, a maxilla, and it is a 3D body fossil.

It was recombined as Trachodon altidens by Lambe (1905), Lambe (1911), Brown (1914), Versluys (1923), Huene (1927) and Hay (1930); it was recombined as Procheneosaurus altidens by Lull and Wright (1942), Kuhn (1964) and Wolberg (1980); it was considered a nomen dubium by Weishampel and Horner (1990), Horner et al. (2004) and Currie (2005).
Hypsibema crassicauda was named by Cope (1869). Its type specimen is USNM 6136, 7189, a set of vertebrae, and it is a 3D body fossil. Its type locality is James King marl pits, which is in a Campanian marine siltstone/claystone in North Carolina.

It was considered a nomen nudum by Lull and Wright (1942); it was misspelled as Hypsibema crassicaude by Richards (1950); it was considered a nomen nudum by Langston (1960); it was considered a nomen dubium by Miller (1967); it was considered a nomen dubium by Weishampel and Horner (1990); it was considered a nomen dubium by Horner et al. (2004).
Orthomerus dolloi was named by Seeley (1883). Its type specimen is BMNH 42955, a set of postcrania, and it is a 3D body fossil. Its type locality is Zichen (IRSNB), which is in a Maastrichtian marine horizon in the Maastricht Formation of Belgium. It is the type species of Orthomerus.

It was recombined as Telmatosaurus dolloi by Mulder (1984); it was considered a nomen dubium by Brinkmann (1988), Weishampel and Horner (1990) and Wellnhofer (1994); it was considered a nomen dubium by Casanovas et al. (1999), Horner et al. (2004), Prieto-Márquez et al. (2006), Buffetaut (2009), Cruzado-Caballero et al. (2010), Godefroit and Motchurova-Dekova (2010) and Dalla Vecchia (2014).
Arstanosaurus was named by Shilin and Suslov (1982). It is not extant.

It was considered a nomen dubium by Weishampel and Horner (1990) and Tsogtbaatar (1997); it was considered a nomen dubium by Norman and Kurzanov (1997), Norman and Sues (2000) and Horner et al. (2004); it was considered a nomen nudum by Lund and Gates (2006).

It was assigned to Hadrosauridae by Shilin and Suslov (1982) and Ryan (1997).
Arstanosaurus akkurganensis was named by Shilin and Suslov (1982). Its type specimen is IZ AN KSSR 1/1 and is a 3D body fossil. Its type locality is Akkurgan (AKK-3), which is in a Santonian/Campanian terrestrial sandstone in the Bostobe Formation of Kazakhstan.

It was considered a nomen dubium by Weishampel and Horner (1990); it was considered a nomen dubium by Norman and Kurzanov (1997), Norman and Sues (2000), Horner et al. (2004), Lund and Gates (2006), Naish et al. (2012) and Bell and Brink (2013).
Troodon isfarensis was named by Nessov (1995). Its type specimen is CCMGE 484/12457, a skull, and it is not a trace fossil. Its type locality is Kyzylpilyal I, FIS-2, which is in a Santonian terrestrial horizon in the Yalovach Formation of Tajikistan.

It was recombined as Saurornithoides isfarensis by Olshevsky (2000); it was considered a nomen dubium by Makovicky and Norell (2004), Averianov and Sues (2007) and Averianov and Alifanov (2012).
Prohadrosauridae was named by Huene (1956).

It was synonymized subjectively with Hadrosauridae by Kuhn (1964) and Kuhn (1966).

It was assigned to Hadrosauria by Huene (1959).
Cionodon kysylkumense was named by Riabinin (1931). Its type specimen is CCMGE 1/3760, a set of vertebrae, and it is not a trace fossil.

It was recombined as Trachodon kysilkumense by Kuhn (1964); it was recombined as Bactrosaurus kysylkumensis by Nessov (1995); it was considered a nomen dubium by Maryanska and Osmólska (1981) and Weishampel and Horner (1990); it was considered a nomen dubium by Norman and Sues (2000) and Horner et al. (2004).
Protrachodontidae was named by Nopcsa (1915).

It was synonymized subjectively with Hadrosauridae by Kuhn (1966).

It was assigned to Trachodontoidea by Huene (1948).

Synonymy list

Year	Name and author
1856	Trachodon Leidy p. 72
1856	Trachodon mirabilis Leidy p. 72
1856	Thespesius Leidy p. 311
1856	Thespesius occidentalis Leidy p. 311
1857	Thespesius occidentalis Leidy p. 90
1857	Trachodon mirabilis Leidy p. 90
1860	Trachodon Leidy p. 140
1860	Trachodon mirabilis Leidy p. 140
1860	Thespesius Leidy p. 151
1860	Thespesius occidentalis Leidy p. 151
1868	Trachodon mirabilis Leidy p. 199
1869	Hadrosauridae Cope p. 91
1869	Hadrosaurus mirabilis Cope p. 98
1869	Hadrosaurus occidentalis Cope p. 98
1869	Ornithotarsus Cope p. 117
1869	Hadrosaurus minor Cope p. 192
1869	Hypsibema Cope p. 192
1869	Hypsibema crassicauda Cope p. 192
1869	Ornithotarsus Cope p. 278
1870	Hypsibema crassicauda Cope
1870	Hadrosauridae Cope p. 91
1870	Ornithotarsus Cope p. 120
1870	Hadrosaurus minor Cope pp. 122-J
1870	Hypsibema Cope pp. 122-G
1870	Hypsibema crassicauda Cope pp. 122-G
1870	Hadrosaurus minor Leidy p. 68
1870	Hadrosaurus mirabilis Leidy p. 68
1870	Thespesius occidentalis Leidy p. 68
1870	Hadrosaurus minor Marsh p. 2
1871	Hadrosaurus cavatus Cope
1871	Hadrosaurus occidentalis Cope pp. 50-52
1871	Hadrosaurus minor Cope p. 51
1871	Hypsibema crassicauda Cope pp. 211-212
1871	Hadrosauridae Cope p. 234
1871	Ornithotarsus Cope p. 234
1874	Cinodon Cope p. 10ff
1874	Cinodon arctatus Cope p. 10ff
1874	Hadrosaurus mirabilis Cope p. 19
1874	Hadrosaurus occidentalis Cope p. 20
1874	Cinodon Cope p. 21ff
1874	Cinodon arctatus Cope p. 22
1875	Cionodon Cope pp. 9-10
1875	Cionodon stenopsis Cope pp. 9-10
1875	Cionodon arctatus Cope p. 10
1875	Ornithotarsus Cope p. 13
1875	Hadrosauridae Cope p. 14
1875	Hypsibema Cope p. 36
1875	Hypsibema crassicauda Cope p. 36
1875	Hadrosaurus mirabilis Cope p. 56
1875	Hadrosaurus occidentalis Cope p. 56
1875	Cionodon arctatus Cope p. 60
1875	Cionodon stenopsis Cope p. 63
1875	Hadrosaurus minor Cope p. 247
1875	Hypsibema crassicauda Cope p. 247
1875	Hadrosaurus cavatus Cope p. 248
1875	Cionodon arctatus Cope p. 433
1875	Hadrosaurus occidentalis Cope p. 433
1875	Hadrosaurus mirabilis Cope p. 434
1876	Diclonius Cope
1876	Diclonius calamarius Cope
1876	Diclonius perangulatus Cope
1876	Diclonius Cope p. 254
1876	Diclonius perangulatus Cope p. 254
1876	Diclonius calamarius Cope p. 255
1876	Cionodon arctatus Sauvage p. 442
1877	Diclonius calmarius Cope p. 316
1877	Diclonius perangulatus Cope p. 316
1877	Diclonius Cope p. 572
1877	Diclonius calamarius Cope p. 572
1877	Diclonius perangulatus Cope p. 572
1877	Trachodon Cope p. 573
1877	Trachodon mirabilis Cope p. 573
1877	Cionodon arctatus Cope p. 597
1882	Cionodon Dollo
1882	Hadrosauridae Dollo
1882	Cionodon Marsh
1882	Hadrosauridae Marsh
1882	Cionodon Sauvage p. 35
1882	Madrosauridae Sauvage p. 35
1883	Cionodon Cope p. 99
1883	Diclonius Cope p. 99
1883	Diclonius mirabilis Cope p. 99
1883	Hadrosauridae Cope p. 99
1883	Hypsibema Cope p. 99
1883	Cionodon arctatus Cope p. 104
1883	Diclonius Cope p. 468
1883	Diclonius mirabilis Cope p. 774
1883	Hadrosauridae Cope p. 774
1883	Orthomerus Seeley p. 248 fig. 2
1883	Orthomerus dolloi Seeley p. 248 fig. 2
1884	Diclonius mirabilis Cope p. 315
1884	Cionodon Dollo p. 298
1884	Diclonius Dollo p. 298
1884	Hadrosauridae Dollo p. 298
1884	Orthomerus Dollo p. 298
1884	Orthomerus dolloi Hulke p. 44
1884	Diclonius mirabilis Hulke p. 48
1884	Cionodon Marsh p. 69
1884	Hadrosauridae Marsh p. 69
1885	Diclonius mirabilis Cope p. 1208
1885	Diclonius Dollo p. 40
1885	Cionodon Marsh p. 764
1885	Hadrosauridae Marsh p. 764
1886	Diclonius mirabilis Cope p. 153
1887	Diclonius mirabilis Seeley p. 85
1888	Trachodontidae Lydekker
1888	Diclonius Lydekker p. 241
1888	Orthomerus Lydekker p. 241
1888	Orthomerus dolloi Lydekker p. 241
1888	Trachodontidae Lydekker p. 241
1888	Trachodon Lydekker p. 243
1889	Diclonius mirabilis Cope pp. 904-905
1889	Pteropelyx Cope pp. 904-905
1889	Pteropelyx grallipes Cope pp. 904-905
1889	Hadrosaurus breviceps Marsh pp. 335-336 figs. 4-5
1890	Trachodontidae Marsh p. 424
1890	Claosauridae Marsh p. 425
1890	Hadrosaurus mirabilis Zittel p. 697
1890	Hypsibema Zittel p. 748
1890	Hadrosauridae Zittel p. 763
1890	Cionodon Zittel p. 765
1890	Ornithotarsus Zittel p. 765
1890	Orthomerus Zittel p. 766
1891	Hadrosauridae Baur p. 450
1891	Hadrosaurus mirabilis Boule p. 15
1891	Hadrosauridae Cope p. 43
1891	Diclonius mirabilis Cope p. 44 fig. 22
1892	Claorhynchus Cope pp. 757-758
1892	Claorhynchus trihedrus Cope pp. 757-758
1893	Hadrosauridae Winkler p. 111
1893	Hadrosaurus mirabilis Winkler p. 112
1895	Cionodon Marsh
1895	Claosauridae Marsh
1895	Trachodon Marsh
1896	Trachodon breviceps Marsh p. 224 figs. Pl. 75
1896	Cionodon Marsh p. 244
1896	Claosauridae Marsh p. 244
1896	Ornithotarsus Marsh p. 244
1896	Trachodon Marsh p. 244
1896	Trachodontidae Marsh p. 244
1897	Diclonius Gadow p. 205
1898	Hadrosauridae Cope p. 70
1898	Diclonius Gadow p. 23
1899	Trachodon mirabilis Lambe p. 69
1900	Hadrosaurus mirabilis Nopcsa p. 556
1900	Hadrosaurus occidentalis Nopcsa p. 556
1900	Cionodon Nopcsa p. 557
1900	Cionodon arctatus Nopcsa p. 557
1900	Cionodon stenopsis Nopcsa p. 557
1900	Hadrosaurus breviceps Nopcsa p. 557
1900	Hadrosaurus cavatus Nopcsa p. 557
1900	Hadrosaurus minor Nopcsa p. 557
1900	Hypsibema Nopcsa p. 557
1900	Hypsibema crassicauda Nopcsa p. 557
1900	Ornithotarsus Nopcsa p. 557
1900	Orthomerus Nopcsa p. 558
1900	Orthomerus dolloi Nopcsa p. 558
1900	Hadrosauridae Van Den Broeck p. 87
1900	Orthomerus Van Den Broeck p. 87
1900	Orthomerus dolloi Van Den Broeck p. 87
1900	Trachodon Van Den Broeck p. 87
1901	Diclonius Gadow p. 429
1901	Hadrosaurus mirabilis Gadow p. 429
1901	Claosauridae Nopcsa p. 208
1901	Hadrosauridae Nopcsa p. 208
1901	Cionodon Nopcsa p. 211
1901	Cionodon arctatus Nopcsa p. 212
1901	Cionodon stenopsis Nopcsa p. 212
1901	Hadrosaurus breviceps Nopcsa p. 212
1901	Hadrosaurus calamarius Nopcsa p. 212
1901	Hadrosaurus minor Nopcsa p. 212
1901	Hadrosaurus mirabilis Nopcsa p. 212
1901	Hadrosaurus occidentalis Nopcsa p. 212
1901	Hadrosaurus perangulatus Nopcsa p. 212
1901	Hypsibema Nopcsa p. 212
1901	Hypsibema crassicauda Nopcsa p. 212
1901	Ornithotarsus Nopcsa p. 212
1901	Orthomerus Nopcsa p. 213
1901	Orthomerus dolloi Nopcsa p. 213
1902	Trachodon Hatcher pp. 384-385
1902	Hypsibema Hay p. 497
1902	Hypsibema crassicauda Hay p. 497
1902	Claorhynchus Hay p. 500
1902	Claorhynchus trihedrus Hay p. 500
1902	Thespesius Hay p. 502
1902	Thespesius occidentalis Hay p. 502
1902	Pteropelyx Hay p. 503
1902	Pteropelyx grallipes Hay p. 503
1902	Trachodon Hay p. 503
1902	Trachodon breviceps Hay p. 503
1902	Trachodon calamarius Hay p. 503
1902	Trachodon cavatus Hay p. 503
1902	Trachodontidae Hay p. 503
1902	Cionodon Hay p. 504
1902	Cionodon arctatus Hay p. 504
1902	Cionodon stenopsis Hay p. 504
1902	Trachodon minor Hay p. 504
1902	Trachodon mirabilis Hay p. 504
1902	Trachodon perangulatus Hay p. 504
1902	Ornithotarsus Hay p. 505
1902	Trachodon (Pteropelyx) selwyni Lambe
1902	Trachodon (Pteropelyx) Lambe p. 69
1902	Trachodon (Pteropelyx) selwyni Lambe pp. 69-70
1902	Trachodon (Pteropelyx) marginatus Lambe p. 70
1902	Trachodon (Pteropelyx) altidens Lambe pp. 76-77
1902	Pteropelyx grallipes Lambe p. 77
1902	Trachydontidae Mansel-Pleydell p. lxxv
1904	Trachodon Lucas p. 318
1905	Cionodon Lambe p. 24
1905	Cionodon stenopsis Lambe p. 24
1905	Trachodon Lambe p. 24
1905	Trachodon altidens Lambe p. 24
1905	Trachodon marginatus Lambe p. 24
1905	Trachodon selwyni Lambe p. 24
1905	Trachodontidae Lambe p. 49
1907	Claorhynchus Hatcher et al. p. 114
1907	Claorhynchus trihedrus Hatcher et al. p. 114
1909	Trachodontidae Arldt p. 263
1909	Orthomerus dolloi Dollo p. 104
1909	Cionodon Huene p. 16
1909	Claorhynchus Huene p. 16
1909	Diclonius Huene p. 16
1909	Ornithotarsus Huene p. 16
1909	Orthomerus Huene p. 16
1909	Trachodon Huene p. 16
1909	Trachodontidae Huene p. 16
1909	Hypsibema Huene p. 17
1909	Trachodon mirabilis Osborn p. 160
1909	Cionodon Sauvage p. 377
1909	Cionodon arctatus Sauvage p. 377
1909	Ornithotarsus Sauvage p. 377
1909	Orthomerus Sauvage p. 377
1909	Trachodon Sauvage p. 377
1909	Trachyodontidae Sauvage p. 377
1910	Trachodon mirabilis Brown p. 270
1910	Hadrosaurus mirabilis Hay p. 15
1910	Thespesius Versluys p. 229
1910	Thespesius occidentalis Versluys p. 229
1911	Hadrosauridae Jaekel p. 159
1911	Trachodon Lambe p. 9
1911	Trachodon selwyni Lambe p. 9
1911	Trachodontidae Lambe p. 9
1911	Trachodon altidens Lambe p. 10
1911	Trachodon marginatus Lambe p. 10
1911	Trachodon von Zittel p. 291
1911	Trachodontidae von Zittel p. 291
1911	Cionodon von Zittel p. 292
1911	Orthomerus von Zittel p. 292
1911	Trachodon breviceps von Zittel p. 292 fig. 441
1911	Trachodon mirabilis von Zittel p. 292 fig. 439
1911	Claorhynchus von Zittel p. 293
1911	Hypsibema von Zittel p. 293
1911	Ornithotarsus von Zittel p. 293
1912	Trachodon mirabilis Brown p. 106
1913	Trachodon mirabilis Brown p. 387
1913	Trachodon marginatus Brown p. 402
1913	Trachodon mirabilis Brown pp. 404-405 figs. 7-8
1913	Trachodon marginatus Lambe p. 25
1913	Trachodon Tornier p. 372
1913	Trachodon mirabilis Tornier p. 372
1914	Trachodon marginatus Bach p. 347
1914	Trachodon mirabilis Brown p. 358
1914	Trachodon Brown p. 377
1914	Trachodon altidens Brown p. 379
1914	Trachodon marginatus Brown p. 379
1914	Trachodon selwyni Brown p. 379
1914	Stephanosaurus marginatus Brown pp. 560-562
1914	Trachodon Brown p. 564
1914	Trachodontidae Huene p. 41
1914	Trachodon mirabile Huene p. 588 figs. Pl. 11:4
1914	Hadrosauridae Jaekel p. 197
1914	Stephanosaurus marginatus Lambe pp. 17-19
1914	Trachodon marginatus Lambe pp. 133-134
1914	Gryposaurus selwyni Lambe pp. 148-149
1914	Stephanosaurus marginatus Lambe p. 293
1915	Thespesius Gilmore pp. 658-660
1915	Trachodon Gilmore pp. 658-659
1915	Thespesius occidentalis Gilmore p. 659
1915	Stephanosaurus marginatus Lambe p. 117
1915	Trachodon Matthew p. 28
1915	Trachodontidae Matthew p. 32
1915	Protrachodontidae Nopcsa
1915	Orthomerus Nopcsa p. 8
1915	Orthomerus dolloi Nopcsa p. 8
1915	Trachodon Nopcsa p. 8
1916	Trachodon marginatus Brown p. 710
1916	Trachodontidae Gilmore p. 281
1916	Stephanosaurus marginatus Lambe p. 193
1917	Stephanosaurus marginatus Gilmore p. 41
1917	Diclonius Lambe pp. 66-67
1917	Diclonius mirabilis Lambe p. 67
1918	Trachodon mirabilis Lambe pp. 135-139
1918	Diclonius Lambe p. 138
1918	Stephanosaurus marginatus Sternberg p. 90
1919	Hadrosauridae Gilmore p. 64
1920	Diclonius Lambe pp. 67-68
1920	Trachodontidae Parks p. 9
1922	Trachodon Joleaud p. 62
1923	Orthomerus Nopcsa p. 105
1923	Trachodontidae Nopcsa p. 126
1923	Trachodontidae Osborn
1923	Trachodon altidens Versluys p. 2
1923	Trachodon marginatus Versluys p. 2
1923	Trachodon mirabilis Versluys p. 2
1923	Trachodon selwyni Versluys p. 2
1924	Thespesius Gilmore p. 14
1924	Diclonius mirabilis Gilmore p. 25
1924	Kritosaurus marginatus Gilmore p. 33
1924	Thespesius Gilmore p. 34
1924	Trachodon Lull p. 240
1924	Trachodontidae Lull p. 240
1926	Thespesius Moodie p. 73
1927	Trachodontidae Huene p. 259
1927	Trachodon Huene p. 260
1927	Trachodon altidens Huene p. 260
1927	Trachodon breviceps Huene p. 260
1927	Trachodon calamarius Huene p. 260
1927	Trachodon marginatus Huene p. 260
1927	Trachodon mirabilis Huene p. 260
1927	Trachodon perangulus Huene p. 260
1927	Trachodon selwyni Huene p. 260
1927	Thespesius Huene p. 261
1927	Ornithotarsus Huene p. 264
1927	Trachodon cavatus Huene p. 264
1927	Trachodon minor Huene p. 264
1927	Orthomerus Huene p. 267
1927	Orthomerus dolloi Huene p. 270
1928	Orthomerus Nopcsa p. 184
1928	Thespesius Nopcsa p. 184
1928	Trachodon Nopcsa p. 184
1928	Trachodontidae Nopcsa p. 184
1928	Hadrosaurus mirabilis Perrier p. 3088
1929	Trachodontidae Nopcsa p. 70
1930	Hadrosauridae Hay p. 208
1930	Hadrosaurus cavatus Hay p. 209
1930	Hadrosaurus minor Hay p. 209
1930	Trachodon Hay p. 209
1930	Trachodon altidens Hay p. 210
1930	Trachodon breviceps Hay p. 211
1930	Trachodon calamarius Hay p. 211
1930	Trachodon mirabilis Hay p. 211
1930	Trachodon perangulatus Hay p. 211
1930	Thespesius Hay p. 212
1930	Thespesius occidentalis Hay p. 212
1930	Trachodon selwyni Hay p. 212
1930	Cionodon Hay p. 214
1930	Cionodon arctatus Hay p. 214
1930	Cionodon stenopsis Hay p. 214
1930	Kritosaurus marginatus Hay p. 214
1930	Hypsibema Hay p. 215
1930	Hypsibema crassicauda Hay p. 215
1930	Claorhynchus Hay p. 216
1930	Claorhynchus trihedrus Hay p. 216
1930	Ornithotarsus Hay p. 216
1930	Pteropelyx Hay p. 216
1930	Pteropelyx grallipes Hay p. 216
1930	Stephanosaurus marginatus Moodie p. 437
1930	Saurolophus krystofovici Riabinin
1930	Diclonius mirabilis Riabinin p. 14
1930	Hadrosaurus cavatus Russell p. 137
1930	Hadrosaurus minor Russell p. 137
1930	Ornithotarsus Russell p. 137
1930	Hadrosauridae Russell p. 138
1930	Thespesius Russell p. 140
1930	Trachodon Russell p. 142
1930	Kritosaurus marginatus Russell p. 148
1930	Corythosaurus selwyni Russell p. 149
1931	Thespesius occidentalis Johnson p. 368
1931	Cionodon kysylkumense Riabinin p. 116 figs. Pl. 2
1933	Thespesius Gilmore p. 62
1934	Trachodontidae Huene p. 15
1935	Trachodontidae Parks p. 184
1935	Saurolophus krischtofovici Young
1936	Thespesius Nagao p. 213
1936	Trachodon mirabilis Sternberg p. 652
1936	Thespesius Sternberg p. 654
1936	Trachodon Sternberg pp. 654-655
1937	Trachodontidae Roxo p. 65
1942	Hadrosauridae Lull and Wright p. 133
1942	Ornithotarsus Lull and Wright p. 133
1942	Thespesius Lull and Wright p. 133
1942	Trachodon Lull and Wright p. 133
1942	Trachodon mirabilis Lull and Wright p. 149
1942	Thespesius occidentalis Lull and Wright pp. 150-151
1942	Kritosaurus breviceps Lull and Wright pp. 170-172
1942	Procheneosaurus altidens Lull and Wright pp. 222-223
1944	Hadrosauridae Rapp p. 287
1944	Hadrosaurus cavatus Rapp p. 287
1944	Hadrosaurus minor Rapp p. 287
1944	Ornithotarsus Rapp p. 287
1944	Trachodon mirabilis Young p. 195
1944	Saurolophus kryschtofovici Young p. 202
1945	Parrosaurus Gilmore p. 540
1945	Parrosaurus missouriensis Gilmore p. 540
1945	Neosaurus Gilmore and Stewart p. 25 figs. 1-3
1945	Neosaurus missouriensis Gilmore and Stewart p. 25 figs. 1-3
1946	Trachodontidae Kuhn p. 66
1946	Orthomerus dolloi Riabinin p. 66
1947	Trachodontidae Lapparent p. 18
1947	Orthomerus Lapparent p. 33
1947	Orthomerus dolloi Lapparent p. 33
1948	Hadrosaurus minor Colbert
1948	Orthomerus Huene p. 94
1948	Protrachodontidae Huene p. 94
1948	Trachodontidae Huene p. 94
1948	Orthomerus Lapparent p. 1186
1950	Hypsibema crassicaude Richards p. 7
1953	Hadrosauridae Sternberg p. 11
1953	Thespesius Sternberg p. 11
1953	Trachodon Sternberg p. 11
1954	Hadrosauridae Sternberg p. 383
1954	Thespesius Sternberg p. 383
1954	Trachodon Sternberg p. 383
1954	Cionodon kisilkumense Yuryev p. 191
1955	Hadrosauridae Miller, Jr. p. 911
1955	Hadrosaurus cavatus Miller, Jr. p. 911
1955	Hadrosaurus minor Miller, Jr. p. 911
1955	Ornithotarsus Miller, Jr. p. 911
1956	Prohadrosauridae Huene p. 539
1956	Parrosaurus Romer p. 622
1956	Hadrosauridae Romer p. 629
1956	Claorhynchus Romer p. 630
1956	Hypsibema Romer p. 630
1956	Ornithotarsus Romer p. 630
1956	Orthomerus Romer p. 630
1956	Thespesius Romer p. 630
1956	Trachodon Romer p. 631
1958	Orthomerus Young p. 106
1958	Thespesius Young p. 106
1959	Hadrosauridae Huene p. 122
1959	Prohadrosauridae Huene p. 122
1959	Saurolophus krystofovici Kobayashi p. 390
1960	Trachodon Bataller p. 161
1960	Orthomerus dolloi Jeletzky p. 35
1960	Trachodon mirabilis Moore and Miller p. 57
1960	Kritosaurus breviceps Vialli p. 176
1962	Hadrosaurus minor Miller p. 194
1962	Hadrosaurus cavatus Miller p. 196
1963	Hadrosauridae Parsch p. 4
1964	Hadrosauridae Casamiquela
1964	Orthomerus Casamiquela
1964	Thespesius Casamiquela
1964	Hadrosauridae Estes p. 144
1964	Hadrosauridae Kuhn p. 13
1964	Cionodon Kuhn p. 16
1964	Cionodon arctatus Kuhn p. 16
1964	Cionodon stenopsis Kuhn p. 16
1964	Claorhynchus Kuhn p. 16
1964	Claorhynchus trihedrus Kuhn p. 16
1964	Diclonius Kuhn p. 16
1964	Diclonius perangulatus Kuhn p. 16
1964	Diclonius calamarius Kuhn p. 17
1964	Pteropelyx Kuhn p. 17
1964	Pteropelyx grallipes Kuhn p. 17
1964	Hadrosaurus minor Kuhn p. 20
1964	Hypsibema Kuhn p. 20
1964	Hypsibema crassicauda Kuhn p. 20
1964	Kritosaurus breviceps Kuhn p. 21
1964	Kritosaurus marginatus Kuhn pp. 21-22
1964	Ornithotarsus Kuhn p. 24
1964	Orthomerus Kuhn p. 24
1964	Orthomerus dolloi Kuhn p. 24
1964	Procheneosaurus altidens Kuhn p. 26
1964	Saurolophus krischtofovici Kuhn p. 26
1964	Thespesius Kuhn p. 27
1964	Thespesius occidentalis Kuhn p. 27
1964	Trachodon Kuhn p. 27
1964	Trachodon atavus Kuhn p. 28
1964	Trachodon kysilkumense Kuhn p. 28
1964	Trachodon mirabilis Kuhn p. 28
1964	Trachodon selwyni Kuhn p. 28
1964	Pteropelyx grallipes Russell p. 10
1964	Trachodon mirabilis Russell p. 10
1964	Kritosaurus marginatus Russell p. 12
1964	Parrosaurus Tatarinov p. 552
1964	Hadrosauridae Tatarinov p. 559
1964	Claorhynchus Tatarinov p. 569
1964	Hypsibema Tatarinov p. 569
1964	Ornithotarsus Tatarinov p. 569
1964	Orthomerus Tatarinov p. 569
1964	Orthomerus dolloi Tatarinov p. 569
1964	Thespesius Tatarinov p. 569
1964	Trachodon Tatarinov p. 569
1966	Orthomerus Campbell p. 165
1966	Hadrosauridae Kuhn p. 103
1966	Claorhynchus Romer p. 370
1966	Hadrosauridae Romer p. 370
1966	Hypsibema Romer p. 370
1966	Ornithotarsus Romer p. 370
1966	Orthomerus Romer p. 370
1966	Parrosaurus Romer p. 370
1966	Thespesius Romer p. 370
1966	Trachodon Romer p. 370
1967	Hadrosauridae Charig p. 716
1967	Orthomerus Charig p. 716
1967	Orthomerus dolloi Charig p. 716
1967	Thespesius Charig p. 716
1967	Thespesius occidentalis Charig p. 716
1967	Trachodon Charig p. 716
1967	Hadrosauridae Miller p. 233
1970	Parrosaurus Steel pp. 76-77
1970	Parrosaurus missouriensis Steel pp. 76-77
1970	Hadrosauridae Swinton p. 215
1970	Hadrosauridae Thulborn p. 428 fig. 9
1971	Orthomerus dolloi Dinca et al. p. 90
1971	Tyrannosauropus Haubold p. 77 fig. 47.12
1971	Tyrannosauropus petersoni Haubold p. 77 fig. 47.12
1971	Hadrosauridae Haubold p. 89
1972	Tyrannosauropus petersoni Ellenberger p. 56
1974	Tyrannosauropus Haubold p. 46
1974	Claorhynchus Thulborn p. 173
1974	Hadrosauridae Thulborn p. 173
1974	Hypsibema Thulborn p. 173
1974	Ornithotarsus Thulborn p. 173
1974	Orthomerus Thulborn p. 173
1974	Thespesius Thulborn p. 173
1974	Trachodon Thulborn p. 173
1975	Trachodon Taquet p. 508
1977	Edmontosaurus minor Baird and Horner p. 50
1977	Hadrosauridae Rozhdestvensky p. 113
1977	Hadrosauridae Thulborn p. 726 fig. 1
1978	Hadrosauridae Bonaparte p. 331
1979	Hypsibema missouriense Baird and Horner p. 7
1979	Hypsibema Baird and Horner p. 10
1979	Hypsibema crassicauda Baird and Horner p. 10
1979	Hadrosauridae Baird and Horner p. 16
1979	Hadrosauridae Benton p. 143
1979	Hadrosauridae Dong
1979	Microhadrosaurus Dong p. 344 figs. Pl. 1:4-5
1979	Microhadrosaurus nanshiungensis Dong p. 344 figs. Pl. 1:4-5
1979	Microhadrosaurus Dong p. 346
1979	Microhadrosaurus nanshiungensis Dong p. 346
1979	Hadrosauridae Madsen and Miller p. 5
1979	Thespesius Madsen and Miller p. 5
1979	Trachodon Madsen and Miller p. 5
1980	Orthomerus Buffetaut et al. p. 201
1980	Hadrosauridae Ostrom p. 22
1980	Kritosaurus breviceps Wolberg p. 50
1980	Procheneosaurus altidens Wolberg p. 50
1981	Hadrosauridae McIntosh p. 31
1981	Hadrosauridae Thurmond and Jones p. 145
1982	Arstanosaurus Shilin and Suslov p. 132
1982	Arstanosaurus akkurganensis Shilin and Suslov p. 132 fig. 1
1983	Hadrosauridae Weishampel and Weishampel p. 44
1983	Orthomerus Weishampel and Weishampel p. 44
1983	Orthomerus dolloi Weishampel and Weishampel p. 44
1984	Orthomerus Brinkmann p. 301
1984	Orthomerus dolloi Brinkmann p. 304
1984	Edmontosaurus minor Gallagher p. 23
1984	Hadrosauridae Milner and Norman p. 146
1984	Telmatosaurus dolloi Mulder p. 108
1984	Hadrosauridae Norman pp. 160-161 fig. 2
1984	Hadrosauridae Russell p. 29
1984	Hypsibema Russell p. 29
1984	Tyrannosauropus Thulborn and Wade p. 419
1984	Tyrannosauropus petersoni Thulborn and Wade p. 449
1985	Orthomerus Buffetaut et al. p. 65
1985	Orthomerus dolloi Buffetaut et al. p. 65
1985	Orthomerus Casanovas-Cladellas et al. p. 156
1985	Hadrosauridae Cooper p. 287
1986	Edmontosaurus minor Baird p. 82
1986	Hadrosauridae Bakker p. 461
1986	Orthomerus Casanovas-Cladellas et al. p. 101
1986	Orthomerus dolloi Casanovas-Cladellas et al. p. 102
1986	Microhadrosaurus nanshiungensis Guan p. 35
1986	Hadrosauridae Sereno
1986	Microhadrosaurus nanshiungensis Zhao p. 71
1987	Orthomerus Casanovas et al. p. 107
1987	Orthomerus dolloi Casanovas et al. p. 107
1988	Hadrosauridae Carroll
1988	Orthomerus Carroll
1988	Trachodon mirabilis Coombs, Jr. p. 817
1989	Hadrosauridae Norman p. 61 fig. 1
1990	Hadrosauridae Benton p. 19
1990	Cionodon Chapman and Brett-Surman p. 177
1990	Microhadrosaurus Chapman and Brett-Surman p. 177
1990	Ornithotarsus Chapman and Brett-Surman p. 177
1990	Hadrosauridae Horner pp. 184-185
1992	Orthomerus Buffetaut p. 133
1992	Microhadrosaurus Dong p. 165
1992	Orthomerus Grigorescu p. 156
1992	Hadrosauridae Horner p. 119
1993	Hadrosauridae Hunt and Lucas p. 80
1993	Hypsibema crassicauda Salgado and Calvo p. 217
1993	Hypsibema missouriensis Salgado and Calvo p. 217
1994	Hypsibema crassicauda Stinchcomb et al. p. 46
1994	Hypsibema missouriense Stinchcomb et al. p. 51
1995	Orthomerus Casanovas-Cladellas et al. p. 278
1995	Orthomerus Le Loeuff and Buffetaut p. 183
1995	Orthomerus dolloi Le Loeuff and Buffetaut p. 183
1995	Troodon isfarensis Nessov p. 43 figs. Pl. 3:12
1995	Hadrosauridae Nessov p. 46
1995	Bactrosaurus kysylkumensis Nessov pp. 47-48
1997	Hadrosauridae Forster p. 47A
1997	Arstanosaurus Ryan p. 443
1997	Arstanosaurus akkurganensis Ryan p. 443
1997	Cionodon Ryan p. 443
1997	Cionodon kysylkumense Ryan p. 443
1997	Hadrosauridae Sereno p. 443
1998	Hadrosauridae Godefroit et al. p. 50 fig. 38
1998	Hadrosauridae Le Loeuff p. 56
1998	Orthomerus Le Loeuff p. 56
1998	Orthomerus dolloi Le Loeuff p. 56
1998	Hadrosauridae Sereno p. 62
1999	Hadrosauridae Casanovas et al. p. 351 fig. 3
1999	Hadrosauridae Sereno p. 2138 fig. 2
2000	Hadrosauridae Norman and Sues p. 465
2000	Saurornithoides isfarensis Olshevsky p. 28
2001	Hadrosauridae Eberth et al. p. 57
2001	Hadrosauridae Peng et al. p. 33
2003	Tyrannosauropus Romero Molina et al. p. 26
2003	Hadrosauridae You et al. p. 152 fig. 3
2004	Hadrosauridae Bolotsky and Godefroit p. 352
2004	Hadrosauridae Godefroit et al. p. 141
2004	Hadrosauridae Martinelli and Forasiepi
2004	Hadrosauridae Norman p. 432
2005	Hadrosauridae You et al. p. 789 fig. 4
2006	Hadrosauridae Prieto-Márquez et al. p. 938
2006	Hadrosauridae Prieto-Márquez et al. p. 80
2008	Hadrosauridae Godefroit et al. p. 67 fig. 18
2009	Tyrannosauropus petersoni Boutakiout et al. p. 42
2009	Hadrosauridae Dalla Vecchia p. 2
2009	Hadrosauridae Pereda-Suberbiola et al. p. 568 fig. 6
2009	Hadrosauridae Sues and Averianov p. 2552 fig. 2
2010	Hadrosauridae Cruzado-Caballero et al. p. 1510
2010	Willinakaqe Juárez Valieri et al. p. 219
2010	Willinakaqe salitralensis Juárez Valieri et al. p. 219 figs. 2-9
2010	Hadrosauridae McDonald et al. p. 808 fig. 10
2010	Hadrosauridae Prieto-Marquez and Salinas p. 835 fig. 20
2010	Hadrosauridae Prieto-Márquez p. 454
2010	Hadrosauridae Prieto-Márquez and Wagner p. 1243 fig. 3
2011	Hadrosauridae Campione and Evans p. 7
2011	Tyrannosauropus petersoni Romilio and Salisbury p. 136
2012	Hadrosauridae Apesteguía et al.
2012	Willinakaqe Apesteguía et al.
2012	Willinakaqe salitralensis Apesteguía et al. p. 399
2012	Hadrosauridae Coria et al. p. 3
2012	Tyrannosauropus petersoni Jiménez Hernández et al. p. 35
2012	Hadrosauridae McDonald p. 2
2012	Hadrosauridae Prieto-Márquez p. 529
2012	Hadrosauridae Ramírez-Velasco et al. p. 392
2013	Willinakaqe salitralensis Poropat p. 114
2013	Willinakaqe Prieto-Marquez
2013	Willinakaqe salitralensis Prieto-Marquez
2014	Willinakaqe salitralensis Coria p. 334
2014	Hadrosauridae Norman p. 37 fig. 2.30
2014	Tyrannosauropus petersoni Xing et al. p. 309
2015	Willinakaqe salitralensis Casal et al. p. 89
2015	Hadrosauridae Freedman Fowler and Horner
2015	Hadrosauridae Tan et al. p. 246
2015	Orthomerus dolloi Ulansky p. 5
2016	Willinakaqe Lehman et al. p. 346
2016	Willinakaqe salitralensis Lehman et al. p. 346
2016	Willinakaqe salitralensis Prieto-Márquez and Gutarra p. 141
2016	Willinakaqe salitralensis Salisbury et al. p. 126
2017	Willinakaqe Bertozzo et al. p. 13
2017	Willinakaqe salitralensis Bertozzo et al. p. 13
2017	Hadrosauridae Cruzado-Caballero and Powell p. 12 fig. 13
2019	Hadrosauridae Kobayashi et al.
2019	Hadrosauridae Prieto-Márquez et al.
2019	Hadrosauridae Takasaki et al. p. 2
2019	Tyrannosauropus petersoni Xing et al. p. 1137
2019	Hadrosauridae Zhang et al.
2020	Hadrosauridae Dalla Vecchia p. 584
2021	Hadrosauridae Ibiricu et al.
2021	Hadrosauridae Kobayashi et al. p. 9 fig. 7
2021	Tyrannosauropus petersoni Leonardi and Carvalho p. 128
2021	Hadrosauridae Verdú et al. p. 10 fig. 9

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()

Rank	Name	Author
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Genasauria
—	Cerapoda
—	Ornithopoda	()
—	Clypeodonta
—	Iguanodontia	()
—	Dryomorpha
—	Styracosterna
—	Hadrosauriformes
—	Hadrosauroidea	()
family	Hadrosauridae
family	Hadrosauridae

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Fm. †Hadrosauridae Cope 1869 [hadrosaurid]

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G. †Acheralichnus Sánchez Roja 2004

†Acheralichnus leonardii Sánchez Roja 2004

G. †Aquilarhinus Prieto-Márquez et al. 2020

†Aquilarhinus palimentus Prieto-Márquez et al. 2020

G. †Eotrachodon Prieto-Márquez et al. 2016

†Eotrachodon orientalis Prieto-Márquez et al. 2016

Subfm. †Hadrosaurinae Lambe 1918 [hadrosaurine]

G. †Anasazisaurus Hunt and Lucas 1993

†Anasazisaurus horneri Hunt and Lucas 1993 [Anasazi lizard]

Unr. †Brachylophosaurini Gates et al. 2011

G. †Acristavus Gates et al. 2011

†Acristavus gagslarsoni Gates et al. 2011

G. †Brachylophosaurus Sternberg 1953

†Brachylophosaurus canadensis Sternberg 1953

Invalid names: Brachylophosaurus goodwini Horner 1988 [synonym]

G. †Hadrosaurus Leidy 1858

†Hadrosaurus foulkii Leidy 1858

G. †Maiasaura Horner and Makela 1979

†Maiasaura peeblesorum Horner and Makela 1979

G. †Ornatops McDonald et al. 2021

†Ornatops incantatus McDonald et al. 2021

G. †Probrachylophosaurus Freedman Fowler and Horner 2015

†Probrachylophosaurus bergei Freedman Fowler and Horner 2015

G. †Wulagasaurus Godefroit et al. 2008

†Wulagasaurus dongi Godefroit et al. 2008

Tr. †Edmontosaurini Glut 1997

G. †Edmontosaurus Lambe 1917

†Edmontosaurus annectens Marsh 1892

Invalid names: Anatosaurus copei Lull and Wright 1942 [synonym], Edmontosaurus edmontoni Gilmore 1924 [synonym], Edmontosaurus saskatchewanensis Sternberg 1926 [synonym], Trachodon longiceps Marsh 1890 [synonym]

†Edmontosaurus regalis Lambe 1917

Invalid names: Agathaumas milo Cope 1874 [synonym]

Invalid names: Anatosaurus Lull and Wright 1942 [synonym], Anatotitan Brett-Surman 1990 [synonym]

G. †Kerberosaurus Bolotsky and Godefroit 2004

†Kerberosaurus manakini Bolotsky and Godefroit 2004

Invalid names: Kundurosaurus nagornyi Godefroit et al. 2012 [synonym]

Invalid names: Kundurosaurus Godefroit et al. 2012 [synonym]

G. †Shantungosaurus Hu 1973

†Shantungosaurus giganteus Hu 1973

Invalid names: Huaxiaosaurus aigahtens Zhao 2011 [synonym], Zhuchengosaurus maximus Zhao et al. 2007 [synonym]

Invalid names: Huaxiaosaurus Zhao 2011 [synonym], Zhuchengosaurus Zhao et al. 2007 [synonym]

G. †Ugrunaaluk Mori et al. 2016

†Ugrunaaluk kuukpikensis Mori et al. 2016

G. †Kamuysaurus Kobayashi et al. 2019

†Kamuysaurus japonicus Kobayashi et al. 2019

Tr. †Kritosaurini Lapparent and Lavocat 1955

G. †Coahuilasaurus Longrich et al. 2024

†Coahuilasaurus lipani Longrich et al. 2024

G. †Gryposaurus Lambe 1914

†Gryposaurus alsatei Lehman et al. 2016

†Gryposaurus latidens Horner 1992

†Gryposaurus monumentensis Gates and Sampson 2007

†Gryposaurus notabilis Lambe 1914

Invalid names: Gryposaurus incurvimanus Parks 1919 [synonym]

G. †Huallasaurus Rozadilla et al. 2021

†Huallasaurus australis Bonaparte et al. 1984

G. †Kelumapusaura Rozadilla et al. 2021

†Kelumapusaura machi Rozadilla et al. 2021

G. †Kritosaurus Brown 1910

†Kritosaurus horneri Hunt and Lucas 1993 [Anasazi lizard]

†Kritosaurus navajovius Brown 1910

G. †Naashoibitosaurus Hunt and Lucas 1993

†Naashoibitosaurus ostromi Hunt and Lucas 1993

G. †Secernosaurus Brett-Surman 1979

†Secernosaurus koerneri Brett-Surman 1979

G. †Mandschurosaurus Riabinin 1930

†Mandschurosaurus amurensis Riabinin 1925

Invalid names: Mandschurosaurus laosensis Hoffet 1943 [nomen dubium]

Tr. †Saurolophini Godefroit et al. 2012

G. †Augustynolophus Prieto-Márquez et al. 2015

†Augustynolophus morrisi Prieto-Marquez and Wagner 2013

G. †Bonapartesaurus Cruzado-Caballero and Powell 2017

†Bonapartesaurus rionegrensis Cruzado-Caballero and Powell 2017

G. †Prosaurolophus Brown 1916

†Prosaurolophus maximus Brown 1916

Invalid names: Prosaurolophus blackfeetensis Horner 1992 [synonym]

G. †Saurolophus Brown 1912

†Saurolophus angustirostris Rozhdestvensky 1952

†Saurolophus osborni Brown 1912

Subfm. †Lambeosaurinae Parks 1923 [lambeosaurine]

G. †Adelolophus Gates et al. 2014

†Adelolophus hutchisoni Gates et al. 2014

G. †Amurosaurus Bolotsky and Kurzanov 1991

†Amurosaurus riabinini Bolotsky and Kurzanov 1991

Invalid names: Sahaliyania elunchunorum Godefroit et al. 2008 [synonym]

Invalid names: Sahaliyania Godefroit et al. 2008 [synonym]

G. †Angulomastacator Wagner and Lehman 2009

†Angulomastacator daviesi Wagner and Lehman 2009

G. †Aralosaurus Rozhdestvensky 1968

†Aralosaurus tuberiferus Rozhdestvensky 1968

Unr. †Arenysaurini Longrich et al. 2021

G. †Adynomosaurus Prieto-Márquez et al. 2019

†Adynomosaurus arcanus Prieto-Márquez et al. 2019

G. †Ajnabia Longrich et al. 2021

†Ajnabia odysseus Longrich et al. 2021

G. †Arenysaurus Pereda-Suberbiola et al. 2009

†Arenysaurus ardevoli Pereda-Suberbiola et al. 2009

G. †Blasisaurus Cruzado-Caballero et al. 2010

†Blasisaurus canudoi Cruzado-Caballero et al. 2010

G. †Canardia Prieto-Marquez et al. 2013

†Canardia garonnensis Prieto-Marquez et al. 2013

G. †Koutalisaurus Prieto-Márquez et al. 2006

G. †Minqaria Longrich et al. 2024

†Minqaria bata Longrich et al. 2024

G. †Pararhabdodon Casanovas Cladellas 1992

†Pararhabdodon isonensis Casanovas Cladellas 1992

Invalid names: Koutalisaurus kohlerorum Prieto-Márquez et al. 2006 [synonym]

Tr. †Corythosaurini Glut 1997

G. †Corythosaurus Brown 1914

†Corythosaurus casuarius Brown 1914

Invalid names: Corythosaurus bicristatus Parks 1935 [synonym], Corythosaurus brevicristatus Parks 1935 [synonym], Corythosaurus excavatus Gilmore 1923 [synonym], Tetragonosaurus cranibrevis Sternberg 1935 [synonym], Tetragonosaurus erectofrons Parks 1931 [synonym]

†Corythosaurus intermedius Parks 1923

G. †Hypacrosaurus Brown 1913

†Hypacrosaurus altispinus Brown 1913

Invalid names: Cheneosaurus tolmanensis Lambe 1917 [synonym]

†Hypacrosaurus stebingeri Horner and Currie 1994

Invalid names: Cheneosaurus Lambe 1917 [synonym]

G. †Lambeosaurus Parks 1923

†Lambeosaurus clavinitialis Sternberg 1935

Invalid names: Corythosaurus frontalis Parks 1935 [synonym]

†Lambeosaurus lambei Parks 1923

Invalid names: Tetragonosaurus praeceps Parks 1931 [synonym]

†Lambeosaurus magnicristatus Sternberg 1935

Invalid names: Didanodon Osborn 1902 [synonym], Didanodon altidens Osborn 1902 [nomen nudum], Procheneosaurus Matthew 1920 [synonym], Stephanosaurus Lambe 1914 [synonym]

G. †Velafrons Gates et al. 2007 [sail forehead]

†Velafrons coahuilensis Gates et al. 2007

G. †Jaxartosaurus Riabinin 1937

†Jaxartosaurus aralensis Riabinin 1938

Invalid names: Jaxartosaurus fuyunensis Wu 1984 [nomen dubium]

G. †Kazaklambia Bell and Brink 2013

†Kazaklambia convincens Rozhdestvensky 1968

Tr. †Lambeosaurini Sullivan et al. 2011

G. †Magnapaulia Prieto-Marquez et al. 2012

†Magnapaulia laticaudus Morris 1981

G. †Latirhinus Prieto-Márquez and Serrano Brañas 2012

†Latirhinus uitstlani Prieto-Márquez and Serrano Brañas 2012

G. †Nipponosaurus Nagao 1936

†Nipponosaurus sachalinensis Nagao 1936

G. †Olorotitan Godefroit et al. 2003

†Olorotitan arharensis Godefroit et al. 2003

Tr. †Parasaurolophini Glut 1997

G. †Charonosaurus Godefroit et al. 2000

†Charonosaurus jiayinensis Godefroit et al. 2000

G. †Parasaurolophus Parks 1922

†Parasaurolophus cyrtocristatus Ostrom 1961

†Parasaurolophus tubicen Wiman 1931

†Parasaurolophus walkeri Parks 1922

G. †Tlatolophus Ramírez-Velasco et al. 2021

†Tlatolophus galorum Ramírez-Velasco et al. 2021

G. †Tsintaosaurus Young 1958

†Tsintaosaurus spinorhinus Young 1958

Invalid names: Aralosaurini Prieto-Marquez et al. 2013 [empty], Cheneosaurinae Lull and Wright 1942 [synonym], Hadrosaurus paucidens Marsh 1889 [nomen dubium], Stephanosaurinae Lambe 1920 [replaced], Tsintaosaurini Prieto-Marquez et al. 2013 [empty]

G. †Lapampasaurus Coria et al. 2012

†Lapampasaurus cholinoi Coria et al. 2012

G. †Malefica Prieto-Márquez and Wagner 2023

†Malefica deckerti Prieto-Márquez and Wagner 2023

Subfm. †Saurolophinae Brown 1914

G. †Barsboldia Maryanska and Osmólska 1981

†Barsboldia sicinskii Maryanska and Osmólska 1981

G. †Laiyangosaurus Zhang et al. 2019

†Laiyangosaurus youngi Zhang et al. 2019

G. †Rhinorex Gates and Scheetz 2014

†Rhinorex condrupus Gates and Scheetz 2014

Invalid names: Glishades Prieto-Márquez 2010 [nomen dubium]

G. †Tridigitichnus Casamiquela 1994

†Tridigitichnus inopinatus Casamiquela 1994

G. †Yamatosaurus Kobayashi et al. 2021

†Yamatosaurus izanagii Kobayashi et al. 2021

Invalid names: Arstanosaurus Shilin and Suslov 1982 [nomen dubium], Arstanosaurus akkurganensis Shilin and Suslov 1982 [nomen dubium], Cionodon Cope 1874 [nomen dubium], Claorhynchus Cope 1892 [nomen dubium], Claosauridae Marsh 1890 [synonym], Diclonius Cope 1876 [nomen dubium], Edmontosaurinae Horner 1992 [empty], Euhadrosauria Weishampel et al. 1993 [empty], Gryposaurinae Horner 1992 [empty], Hadrosaurus breviceps Marsh 1889 [nomen dubium], Hadrosaurus cavatus Cope 1871 [nomen dubium], Hadrosaurus minor Marsh 1870 [nomen dubium], Hypsibema Cope 1869 [nomen dubium], Maiasaurinae Horner 1992 [empty], Microhadrosaurus Dong 1979 [nomen dubium], Neosaurus missouriensis Gilmore and Stewart 1945 [nomen dubium], Ornithotarsus Cope 1869 [nomen dubium], Orthomerus Seeley 1883 [nomen dubium], Parrosaurus Gilmore 1945 [nomen dubium], Prohadrosauridae Huene 1956 [synonym], Prohadrosaurinae Young 1958 [empty], Protrachodontidae Nopcsa 1915 [synonym], Pteropelyx Cope 1889 [nomen dubium], Saurolophidae Prieto-Márquez and Wagner 2010 [empty], Saurolophus krystofovici Riabinin 1930 [nomen dubium], Thespesius Leidy 1856 [nomen dubium], Trachodon Leidy 1856 [nomen dubium], Trachodontidae Lydekker 1888 [synonym], Troodon isfarensis Nessov 1995 [nomen dubium], Tyrannosauropus Haubold 1971 [nomen dubium], Willinakaqe Juárez Valieri et al. 2010 [nomen vanum]

Diagnosis

Reference	Diagnosis
E. D. Cope 1869	I. Teeth in several rows forming a vertical pavement ; metatarsals 1 three.
L. Dollo 1882	Several rows of teeth simulate the molars of living ungulates.
K. A. v. Zittel 1890	ZurischerikieferundPraedentcdelöffelartigausgebreitet,zahnlos. Rückenwirbel opisthocöl. Postpubis verlängert und dünn; Ischium sehr schlank, Femur mit kammjörmigem, viertem Trochanter. Oberkiefer- und Unterkieferzahne in mehreren Reihen übereinander stehend und eine fast senkrechte Kaufläche bildend.
B. F. Nopcsa 1901	Intermaxillare fogatlan: egyszerre több fogsor van használatban. Nyakcsigolyák opistocoelek. Lábszárcsontok üresek, különben olyanok mint a Claosauridák. [Intermaxillary toothless: several dentures are used at the same time. Cervical vertebrae opisthocoelous. Tibiae are hollow, otherwise they are like Claosaurids.]
B. F. Nopcsa 1901 (Claosauridae)	Intermaxillare fogatlan, csak egy fogsor van használatban. Mellsö csigolyák opistocoelek. 9 sacrumcsigolya. A sternum csontosodott. A pubes kicsiny és gyenge. Femur a tibiánál hosszabb. A kézen 4, a lábon 3 ujj; a csontok tömörek; paták. [Intermaxillary is toothless, only one denture is used. Trunk vertebrae opisthocoelous. 9 sacrum vertebra. The sternum was ossified. The pubes are small and weak. Femur longer than tibia. 4 fingers on the hands and 3 on the feet; the bones are solid; hooves.]
R. S. Lull 1924 (Trachodontidae)	Premaxillaries toothless; teeth with several rows simultaneously functional; anterior vertebrae opisthoccelous ; femur generally longer than the tibia; hand four-fingered; foot four-toed, with hoof-like unguals. The tooth battery reaches its maximum development in the members of this family, there being as many as frorn 45 to 60 vertical and from 10 to 14 horizontal rows of teeth, making at least 2000 in both jaws, a very perfect adaptation to a harsh plant diet. The trachodonts also possessed a powerful, laterally compressed tail suitable for swimming, and the hands and probably the feet w ere webbed, the skin in the hand extending paddle-like beyond the ends of the digits, as we know from the mummified specimens which have been preserved to us. There was no defensive armor, as the skin is covered everywhere with small, raised, roughly pentagonal scales, somewhat similar to those of the Gila monster, Heloderma, and never overlapping, as are those of most lizards and snakes and the fishes.
B. F. Nopcsa 1928 (Trachodontidae)	teeth very numerous, not sculptured, rapidly replacing each other; opisthocoelous cervicals
F. v. Huene 1948 (Trachodontidae)	Numerous teeth in several rows functioning as a unit; premaxilla in the form of a flat long duck-like beak; elongated forearm.
F. v. Huene 1948 (Protrachodontidae)	Relatively few teeth; short premaxilla (Orthomerus, Tanus).

Measurements

No measurements are available

Composition:

hydroxyapatiteo

Entire body:

yeso

Adult length:

10 to < 100o

Adult width:

1.0 to < 10o

Adult height:

1.0 to < 10o

Maximum body mass:

10000 kgg

Minimum body mass:

1000 kgg

Architecture:

compact or denseo

Ontogeny:

accretion, modification of partso

Grouping:

gregariouso

Environment:

terrestrialo

Locomotion:

actively mobileo

Life habit:

ground dwellingo

Diet:

herbivoresubo

Reproduction:

oviparouso

Dispersal:

direct/internalo

Dispersal 2:

mobileo

Created:

2009-01-03 20:40:05

Modified:

2009-01-03 22:40:05

Source: g = genus, subo = suborder, o = order

References: Marsh 1875, Peczkis 1995, Benton 1983

Age range: base of the Aalenian to the top of the Edmontonian or 174.10000 to 66.00000 Ma

Collections (1423 total)

Time interval	Ma	Country or state	Original ID and collection number
Oldest occurrences
Aalenian - Bajocian	174.1 - 168.3	China (Sichuan)	Trachodontidae indet. (140257)
Early/Lower Cretaceous	145.0 - 100.5	Mongolia (Dornogov)	Hadrosauridae indet. (127659)
Early/Lower Cretaceous	145.0 - 100.5	Mongolia (Omngov)	Sauropoda indet. (48928)
Cretaceous	145.0 - 66.0	Argentina (Salta)	Hadrosauridae indet. (85837)
Aptian - Albian	125.0 - 100.5	USA (Montana)	Hadrosauridae indet. (142754)
Aptian - Albian	125.0 - 100.5	Canada (British Columbia)	Hadrosauridae indet. (126798 187325)
Aptian - Albian	125.0 - 100.5	Laos (Savannakhet)	Hadrosauridae indet., Mandschurosaurus laosensis, Hadrosauridae indet. (130271)
Aptian - Albian	125.0 - 100.5	Kyrgyzstan (Jalal-Abad)	Hadrosauridae indet. (59602)
Albian	113.0 - 100.5	Spain (Aragón)	Trachodon sp. (61323)
Late/Upper Albian	105.3 - 99.6	USA (Nebraska)	Trachodon sp. (27035)
Youngest occurrences
Time interval	Ma	Country or state	PBDB collection number
Late/Upper Maastrichtian	70.6 - 66.0	Antarctica	Hadrosauridae indet. (51962) Hadrosaurinae indet. (51900)
Late/Upper Maastrichtian	70.6 - 66.0	USA (New Mexico)	Hadrosauridae indet. (47015 56045 59068 97795 138836 171032) Kritosaurus navajovius (76747) Lambeosaurini indet. (138833 138834) Trachodontidae indet. (62486 62488)
Late/Upper Maastrichtian	70.6 - 66.0	Morocco (Khouribga)	Ajnabia odysseus, Minqaria bata (215206) Lambeosaurinae indet. (230117)
Late/Upper Maastrichtian	70.6 - 66.0	USA (Texas)	Hadrosauridae indet. (189806) Hadrosauridae indet., Gryposaurus alsatei (187092)
Late/Upper Maastrichtian	70.6 - 66.0	Russian Federation (Amur)	Hadrosauridae indet., Lambeosauridae indet., Gryposaurus asiaticus (38134) Kerberosaurus manakini, Hadrosauridae indet. (47029)
Late/Upper Maastrichtian	70.6 - 66.0	Canada (Saskatchewan)	Edmontosaurus annectens (229474) Hadrosaurinae indet. (54105) Thespesius sp. (45675)
Late/Upper Maastrichtian	70.6 - 66.0	Spain (Burgos)	Hadrosauridae indet. (213730)
Late/Upper Maastrichtian	70.6 - 66.0	Netherlands (Limburg)	Euhadrosauria indet. (67136) Hadrosauridae indet. (67133 67135 67137) Orthomerus dolloi (48876) Telmatosaurus dolloi (67134)
Late/Upper Maastrichtian	70.6 - 66.0	USA (Wyoming)	Anatosaurus annectens (45878 54176 150933) Anatosaurus sp. (14585 52695 57162 57163 57166 57168 57169 57170 150976) Claosaurus annectens (46209) Edmontosaurus annectens (26760) Hadrosauridae indet. (22638 52089 128559 175972 239131) Hadrosauridae indet., Claosaurus annectens (49238) Lambeosaurinae indet. (48327) Trachodon annectens (54178) Trachodon longiceps (46120) Trachodon sp. (57764 164991 164992 164993 171094) Trachodon sp., Trachodontidae indet. (46125) Trachodontidae indet. (46128)
Late/Upper Maastrichtian	70.6 - 66.0	France (Haute-Garonne)	Hadrosauridae indet. (48865 67193 67194 67196 98904 118194) Pararhabdodon sp. (172587)