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Khunnuchelys
Taxonomy
Khunnuchelys was named by Brinkman et al. (1993). Its type is Khunnuchelys erinhotensis.
It was assigned to Trionychidae by Brinkman et al. (2008); to Trionychinae by Brinkman et al. (1993), Vitek and Danilov (2013) and Danilov et al. (2015); and to Pantrionychidae by Georgalis and Joyce (2017).
It was assigned to Trionychidae by Brinkman et al. (2008); to Trionychinae by Brinkman et al. (1993), Vitek and Danilov (2013) and Danilov et al. (2015); and to Pantrionychidae by Georgalis and Joyce (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Khunnuchelys Brinkman et al. p. 2215 |
| 2008 | Khunnuchelys Brinkman et al. p. 74 |
| 2013 | Khunnuchelys Vitek and Danilov |
| 2015 | Khunnuchelys Danilov et al. |
| 2017 | Khunnuchelys Georgalis and Joyce |
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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.
G. †Khunnuchelys Brinkman et al. 1993
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†Khunnuchelys erinhotensis Brinkman et al. 1993
†Khunnuchelys kizylkumensis Brinkman et al. 1993
†Khunnuchelys lophorhothon Danilov et al. 2015
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| I. G. Danilov et al. 2015 | A trionychid in which the orbits face strongly forwards; the suborbital region of the maxilla is deep; the palate is vaulted; the triturating surfaces of the maxilla and dentary are beaklike; the triturating surfaces of the maxillae meet at the midline, forming a mid-ventral ridge; the internal nares are located far posteriorly and are roofed by the palatines and maxillae; the anterolateral corner of the palatine and posterolateral corner of the maxilla are greatly enlarged to form about half of the triturating surface; the maxilla and jugal are swollen to form a broadly convex surface in dorsal view; the postorbital contacts the maxilla, excluding the jugal from the margin of the orbit; the roof of the skull is constricted to expose the palatine in dorsal view; the descending process of the parietal does not participate in the processus trochlearis oticum; a posteriorly facing occipital surface is bordered dorsally by a rounded ridge formed by the opisthotic and supraoccipital; a concave surface is present on the occiput above the fenestra postotica and lateral to the foramen magnum; the occipital surface of the exoccipital faces posteriorly; nervi hypoglossi exit via a single foramen in the exoccipital. Similar to Conchochelys in the presence of a deeply excavated palate, extensively developed secondary palate with broad contact of the maxillae at the midline, grooves extending backwards from the internal choanal openings, and short basioccipital region. Similar to Dogania in that the prefrontal makes a small contribution to the orbit margin between the frontal and maxilla. |