PBDB Taxon

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Argillochelys

Reptilia - Testudines

Taxonomy

Argillochelys was named by Lydekker (1889) [Sepkoski's age data: T Eo-l T Eo-m]. It is not extant.

It was assigned to Chelonidae by Lydekker (1889); to Eochelyinae by Moody (1980); to Eocheloniinae by Weems (1988); to Cheloniidae by Carroll (1988), Hirayama (1995); to Chelonia by Sepkoski (2002); and to Pancheloniidae by Zvonok and Danilov (2017).

Species

A. africana, A. antiqua, A. brachyceps, A. convexa (syn. Chelone declivis), A. cuneiceps, A. subcristata (syn. Chelone subcarinata)

Synonymy list

Year	Name and author
1889	Argillochelys Lydekker p. 40
1980	Argillochelys Moody p. 165
1988	Argillochelys Carroll
1988	Argillochelys Weems p. 141 figs. Table 2
1995	Argillochelys Hirayama p. 282
2002	Argillochelys Sepkoski
2017	Argillochelys Zvonok and Danilov p. 492

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha

Rank	Name	Author
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Testudinata	(Oppel 1811)
order	Testudines	Batsch 1788
suborder	Cryptodira
—	Panchelonioidea	Joyce et al. 2004
—	Pancheloniidae	Joyce et al. 2004
genus	Argillochelys

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. †Argillochelys Lydekker 1889

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†Argillochelys africana Tong and Hirayama 2008

†Argillochelys antiqua König 1825

†Argillochelys brachyceps Owen 1850

†Argillochelys convexa Owen 1841

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Invalid names: Chelone declivis Owen 1849 [synonym]

†Argillochelys cuneiceps Owen 1849

†Argillochelys subcristata Owen 1841

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Invalid names: Chelone subcarinata Owen 1849 [synonym]

Diagnosis

Reference	Diagnosis
E. A. Zvonok and I. G. Danilov 2017	(1) Orbits directed laterally and slightly anteriorly. (2) Frontals contributing to the orbital margins. (3) The secondary palate reaches between half and two thirds the distance between the anterior margin of the skull and the fossa temporalis inferior. (4) Labial ridge of the upper jaw is vertical and sharp. (5) Vomer hexagonal in outline and in a wide contact with the palatines on the secondary palate. (6) Pterygoids broad anteriorly and with posterolaterally oriented external processes. (7) Length of the mandibular symphysis about one third the length of the mandibular ramus. (8) Triturating surface of the lower jaw with labial, lingual, and sym- physeal ridges. (9) Plastron with wide axillo-inguinal distance (plastral bridge). See Discussion for details about characters.