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Chelydropsis aubasi
Discussion
The species epithet is formed by reference to the late Charles Aubas, who supported discovery of the new species named after him by providing local fossil collectors access to the sandpit of Chry-Chartreuve, urn:lsid:zoobank.org:act:8DB084EC-EE90-440A-A8B2-F0E926831542.
Taxonomy
Chelydropsis aubasi was named by Joyce et al. (2022). Its type specimen is Syntype series of 15 specimens (NMB CHC collection) (NMB CHC.3, a neural III and IV with partial right costal IV (Figure 2c); NMB CHC.15, a right peripheral I (Figure 3a); NMB CHC.13, a right peripheral II (Figure) and is a 3D body fossil. Its type locality is Chéry-Chartreuve, which is in a Bartonian terrestrial horizon in France.
Synonymy list
| Year | Name and author |
|---|---|
| 2022 | Chelydropsis aubasi Joyce et al. |
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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.
†Chelydropsis aubasi Joyce et al. 2022
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. G. Joyce et al. 2022 | Chelydropsis aubasi can be differentiated from C. murchisoni and crown chelydrids by the plesiomorphic presence of an osseous bridge consisting of pegs and sockets, formation of a solid plastron that lacks central and lateral fontanelles, presence of only nuanced posterior carapacial serrations, and development of rounded plastral lobes. Chelydropsis aubasi differs from Tullochelys montana and the remaining, unambiguous pan-chelydrids by relatively small size (much greater in Protochelydra zangerli and C. kusnetzovi), presence of a relatively broad vertebral I that nearly contacts marginal II (much narrower in C. kusnetzovi), a more anteriorly located gutter that runs from peripheral II–VI (peripheral process that typically terminates in peripheral III (peripheral II in C. decheni and T. montana), relatively broad and rounded anterior and posterior plastral lobes (otherwise only broad in T. montana), an inguinal buttress that terminates in peripheral VII or VIII (otherwise only present in T. montana), an inguinal scale that covers the hyo-hypoplastral suture (an intermittent inframarginal in all other forms), V-shaped intergulars that form a distinct “epiplastral beak” (absent in C. kusnetzovi), and retraction of the abdominal from the axillary notch. |