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Ampelognathus coheni

Reptilia

Taxonomy
Ampelognathus coheni was named by Tykoski et al. (2023) [Holotype: DMNH 2021-05-02, "an almost complete left dentary, missing a piece of its posterolateral corner, all dentition except the root of dentary tooth 6, and the medial walls of most alveoli dorsal to the replacement teeth foramina."]. Its type specimen is DMNH 2021-05-0, a partial skull (an almost complete left dentary), and it is a 3D body fossil. Its type locality is Grapevine Lake Dam Spillway, which is in a Cenomanian delta plain sandstone in the Lewisville Formation of Texas. It is the type species of Ampelognathus.

Synonymy list
YearName and author
2023Ampelognathus coheni Tykoski et al.

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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
RankNameAuthor
subclassEureptilia()
Romeriida
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Cerapoda
Ornithopoda()
genusAmpelognathus
speciescoheni

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.

Ampelognathus coheni Tykoski et al. 2023
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Diagnosis
ReferenceDiagnosis
R. S. Tykoski et al. 2023Ampelognathus coheni is distinguished from other, closely related ornithopod dinosaurs by: an approximately 45° counter-clockwise ‘twist’ or torsion of the middle and posterior sections of the dentary relative to the anterior part of the dentary, resulting in dorsomedial orientation of the axes of the posterior (distal) alveoli relative to the anterior (mesial) alveoli (autapomorphy); no diastema between predentary contact and first dentary alveolus; coronoid process weak or low, so that dentary height at the process is less than 150 percent mandibular height under the mid-part of the tooth row.