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Ampelognathus coheni
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
| Year | Name and author |
|---|---|
| 2023 | Ampelognathus coheni Tykoski et al. |
| 2025 | Ampelognathus coheni Czepiński and Madzia p. 13 |
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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
| Reference | Diagnosis | |
|---|---|---|
| R. S. Tykoski et al. 2023 | Ampelognathus 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. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Kiessling 2004, Benton 1983 | |||||
Age range: Middle Cenomanian or 100.50000 to 93.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Cenomanian | USA (Texas) | Ampelognathus coheni (type locality: 94333) |