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Comptonatus chasei
Taxonomy
Comptonatus chasei was named by Lockwood et al. (2024) [The type specimen is housed at Isle of Wight County Museum Service]. Its type specimen is IWCMS 2014.80, a partial skeleton ( an almost complete skel- eton composed of the following elements: right maxilla, right nasal fragment, both vomers, both quadrates, both squamosals, both prefr), and it is a 3D body fossil. Its type locality is Compton Bay Comptonatus, which is in a Barremian terrestrial claystone in the Wessex Formation of the United Kingdom. It is the type species of Comptonatus.
Synonymy list
| Year | Name and author |
|---|---|
| 2024 | Comptonatus chasei Lockwood et al. p. 5 figs. 2-40, 42-45 |
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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.
†Comptonatus chasei Lockwood et al. 2024
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. F. Lockwood et al. 2024 | Comptonatus chasei differs from all other iguanodontians by possessing the following autapomorphies and unique combination of characters (autapomorphies indicated with an asterisk): (1) parietal ‘tubercle’ and step, dorsolateral to ascending process of supraoccipital*; (2) exoccipital bar/bridge overhangs the exoccipital pillar*; (3) basioccipital with thin median ridge in ventral sulcus; (4) dentary is straight across the entire ventral margin in lateral view; (5) dentary and maxillary crowns both have grooved primary ridges*; (6) tall neural spines on proximal caudal vertebrae (neural spine > three times height of centrum and c. four times the height in Cd1); (7) excluding Cd1 and Cd2, both proximal and middle caudal vertebrae have a deep ventral sulcus; (8) supraglenoid fossa of the scapula absent; (9) coracoid boss on dorsolateral medial surface*; (10) coracoid has medial cavity buttressed by cornuate ridge*; (11) prepubic blade markedly dorsoventrally expanded with (reconstructed) ratio of maximum to minimum depth of the prepubic blade c. 2.5; (12) boss on medial surface of tibia near dorsal margin*. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Kiessling 2004, Benton 1983, Marsh 1875 | |||||