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Secernosaurus koerneri

Reptilia - Hadrosauridae

Taxonomy
Secernosaurus koerneri was named by Brett-Surman (1979). Its type specimen is FMNH PR 13423, a partial skeleton, and it is a 3D body fossil. Its type locality is Lago Colhue Huapi, Rio Chico (FMNH), which is in a Campanian/Maastrichtian terrestrial horizon in the Lago Colhué Huapi Formation of Argentina. It is the type species of Secernosaurus.

Synonymy list
YearName and author
1979Secernosaurus koerneri Bonaparte p. 233
1979Secernosaurus koerneri Brett-Surman p. 561 fig. 2
1980Secernosaurus koerneri Bonaparte and Powell p. 26
1983Secernosaurus koerneri Weishampel and Weishampel p. 44
1984Secernosaurus koerneri Bonaparte p. 141
1986Secernosaurus koerneri Bonaparte p. 90
1987Secernosaurus koerneri Powell p. 149
1990Secernosaurus koerneri Weishampel and Horner p. 556
1992Secernosaurus koerneri Horner p. 15
1996Secernosaurus koerneri Bonaparte p. 111 fig. 45
1997Secernosaurus koerneri Novas p. 680
2001Secernosaurus koerneri Coria and Salgado p. 166
2004Secernosaurus koerneri Horner et al. p. 439
2006Secernosaurus koerneri Lund and Gates p. 274
2007Secernosaurus koerneri Casal et al. p. 60
2008Secernosaurus koerneri Godefroit et al. p. 66
2010Secernosaurus koerneri Cruzado-Caballero et al. p. 153
2010Secernosaurus koerneri Ibiricu et al.
2010Secernosaurus koerneri Juárez Valieri et al. p. 218
2010Secernosaurus koerneri Prieto-Marquez p. 842
2010Secernosaurus koerneri Prieto-Marquez and Salinas pp. 815-816
2010Secernosaurus koerneri Prieto-Márquez p. 5 fig. 2
2010Secernosaurus koerneri Prieto-Márquez and Norell p. 8
2010Secernosaurus koerneri Prieto-Márquez and Wagner p. 1243 fig. 3
2011Secernosaurus koerneri Coria p. R9
2011Secernosaurus koerneri Prieto-Márquez p. 63
2012Secernosaurus koerneri Apesteguía et al. p. 399
2012Secernosaurus koerneri Prieto-Márquez p. 518
2012Secernosaurus koerneri Ramírez-Velasco et al. p. 392
2013Secernosaurus koerneri Poropat p. 114
2013Secernosaurus koerneri Prieto-Marquez
2014Secernosaurus koerneri Coria p. 333
2015Secernosaurus koerneri Casal et al. p. 86
2016Secernosaurus koerneri Cruzado-Caballero p. 49
2016Secernosaurus koerneri Lehman et al. p. 346
2016Secernosaurus koerneri Martínez et al. p. 59
2016Secernosaurus koerneri Prieto-Márquez and Gutarra p. 140
2016Secernosaurus koerneri Salisbury et al. p. 126
2017Secernosaurus koerneri Bertozzo et al. p. 13
2017Secernosaurus koerneri Cruzado-Caballero and Powell p. 1
2018Secernosaurus koerneri Cruzado-Caballero et al. p. 182
2019Secernosaurus koerneri Ibiricu et al. p. 276

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
RankNameAuthor
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
—Dryomorpha
—Styracosterna
—Hadrosauriformes
—Hadrosauroidea()
familyHadrosauridae
subfamilyHadrosaurinaeLambe 1918
tribeKritosauriniLapparent and Lavocat 1955
genusSecernosaurus
specieskoerneri

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.

†Secernosaurus koerneri Brett-Surman 1979
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Diagnosis
ReferenceDiagnosis
A. Prieto-Marquez and G. C. Salinas 2010Hadrosaurid dinosaur that differs from all other members of the clade on the basis of the following autapomorphies and unique combination of appendicular characters: V-shaped nasofrontal suture where the anterior margin of each frontal forms a median triangular process that is laterally deep, anteriorly excavated, and has an anteriorly offset ventral margin. Pubis with a distal blade that differs from that of all other hadrosauroids (except that of species of Gryposaurus, Prosaurolophus, and probably Saurolophus) in having a subrect-angular lateral geometry with parallel dorsal and ventral margins; the prepubic process differs from that of species of Gryposaurus, Prosaurolophus, and Saurolophus in having a ventral margin that forms a wider arch, showing a more gentle ventral deflection distally. Ilium with the unique combination of the following four characters: dorsomedially twisted postacetabular process forming a ventromedially oriented brevis shelf-like surface; median longitudinal ridge on the dorsal surface of the postacetabular process; postacetabular process nearly as long as the iliac central plate and oriented posterodorsally; and asymmetrical and anteroposteriorly extensive supraacetabular process.
R. A. Coria 2011diagnosticado por una cresta supracetabular poco desarrollada y proceso postacetabular con bordes lateral y medial paralelos