PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Tenontosaurus

Reptilia

Taxonomy

Tenontosaurus was named by Ostrom (1970).

It was assigned to Iguanodontidae by Ostrom (1970), Langston (1974), Thulborn (1974), Galton (1974), Taquet (1975), Galton and Jensen (1979), Sues (1980) and Molnar (1980); to Ornithopoda by Sues and Norman (1990); to Hypsilophodontia by Norman (1989) and Norman (1990); to Hypsilophodontidae by Weishampel and Weishampel (1983), Milner and Norman (1984), Norman (1984), Russell (1984), Carroll (1988), Galton (1989) and Stanford et al. (2004); to Euornithopoda by Weishampel (2006); to Iguanodontia by Sereno (1986), Weishampel and Heinrich (1992), Coria and Salgado (1996), Sereno (1997), Winkler et al. (1997), Sereno (1998), Sereno (1999), Coria and Calvo (2002), Norman (2004), Novas et al. (2004) and Ruiz-Omeñaca et al. (2007); to Iguanodontia by Kirkland (1997), Butler et al. (2008), Guenther (2009), McDonald et al. (2010), Ruiz-Omeñaca et al. (2010) and Han et al. (2012); and to Iguanodontia by Buchholz (2002), Galton (2009), McDonald (2012), Madzia et al. (2018), Herne et al. (2019), Dieudonné et al. (2020) and Verdú et al. (2021).

Species

T. dossi, T. tilletti

Synonymy list

Year	Name and author
1970	Tenontosaurus Ostrom p. 85 figs. Pl. 16-21
1974	Tenontosaurus Galton pp. 151-152
1974	Tenontosaurus Langston p. 82
1974	Tenontosaurus Thulborn p. 172
1975	Tenontosaurus Taquet p. 507
1979	Tenontosaurus Galton and Jensen p. 5
1980	Tenontosaurus Molnar p. 137
1980	Tenontosaurus Sues p. 52
1983	Tenontosaurus Weishampel and Weishampel p. 44
1984	Tenontosaurus Milner and Norman p. 147
1984	Tenontosaurus Norman pp. 342-344 fig. 7
1984	Tenontosaurus Russell p. 23
1986	Tenontosaurus Sereno
1988	Tenontosaurus Carroll
1989	Tenontosaurus Galton p. 218
1989	Tenontosaurus Norman p. 63
1990	Tenontosaurus Norman p. 153 fig. 11.7
1990	Tenontosaurus Sues and Norman p. 500
1992	Tenontosaurus Weishampel and Heinrich p. 164
1996	Tenontosaurus Coria and Salgado p. 454 fig. 13
1997	Tenontosaurus Kirkland p. 98
1997	Tenontosaurus Sereno p. 440 fig. 2
1997	Tenontosaurus Winkler et al. pp. 342-345 fig. 19
1998	Tenontosaurus Sereno p. 67 fig. 5
1999	Tenontosaurus Sereno p. 2138 fig. 2
2002	Tenontosaurus Buchholz p. 21
2002	Tenontosaurus Coria and Calvo p. 508 fig. 9
2004	Tenontosaurus Norman p. 414
2004	Tenontosaurus Novas et al. p. 79 fig. 2C
2004	Tenontosaurus Stanford et al. p. 257
2006	Tenontosaurus Weishampel p. 145
2007	Tenontosaurus Ruiz-Omeñaca et al. p. 8
2008	Tenontosaurus Butler et al. pp. 11, 21 figs. 2-3
2009	Tenontosaurus Galton p. 215
2009	Tenontosaurus Guenther p. 1428
2010	Tenontosaurus McDonald et al. p. 33 fig. 39
2010	Tenontosaurus Ruiz-Omeñaca et al. p. 84
2012	Tenontosaurus Han et al. p. 1391 fig. 14
2012	Tenontosaurus McDonald p. 2
2018	Tenontosaurus Madzia et al. p. 973 fig. 4
2019	Tenontosaurus Herne et al. p. 574 fig. 25
2020	Tenontosaurus Dieudonné et al.
2021	Tenontosaurus 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	()

Rank	Name	Author
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Genasauria
—	Cerapoda
—	Ornithopoda	()
—	Clypeodonta
—	Iguanodontia	()
genus	Tenontosaurus

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.

G. †Tenontosaurus Ostrom 1970

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†Tenontosaurus dossi Winkler et al. 1997

†Tenontosaurus tilletti Ostrom 1970

Diagnosis

Reference	Diagnosis
R. J. Butler et al. 2008	Dorsoventrally tall maxilla, nearly full height of the rostrum; orbit square; 12 cervical vertebrae; elongate tail (59+ caudals).