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Prosaurosphargis yingzishanensis
Taxonomy
Prosaurosphargis yingzishanensis was named by Wolniewicz et al. (2023). Its type specimen is HFUT YZSB-19-109, a partial skeleton, and it is a 3D body fossil. Its type locality is Yingzishan quarry, which is in a Spathian lagoonal/restricted shallow subtidal mudstone in the Jialingjiang Formation of China. It is the type species of Prosaurosphargis.
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Prosaurosphargis yingzishanensis Wolniewicz 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.
†Prosaurosphargis yingzishanensis Wolniewicz et al. 2023
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. S. Wolniewicz et al. 2023 | Diagnosis: A saurosphargid characterised by the following combination of character states: 1) spaces between dorsal transverse processes anteroposteriorly shorter than the anteroposterior widths of the transverse processes (like in Saurosphargis and Sinosaurosphargis, but different from Largocephalosaurus, in which the spaces between the dorsal transverse processes are wider than the transverse processes); 2) ribs without uncinate processes (like in Sinosaurosphargis, but unlike in Saurosphargis and Largocephalosaurus, in which uncinate processes are present); 3) osteoderms forming a median, parasaggital and lateral rows (similar to Largocephalosaurus polycarpon, but different from L. qianensis, in which additional, small osteoderms more extensively cover the lateral sides of the body, and different from Sinosaurosphargis, in which the osteoderms form an extensive dorsal armour); 4) ectepicondylar groove on humerus present (like in Largocephalosaurus qianensis, absent in L. polycarpon); 5) entepicondylar foramen in humerus absent (as in Largocephalosaurus) (details of humerus morphology unknown in Sinosaurosphargis); 6) radius short relative to humerus compared with other saurosphargids; 7) presence of a single distal tarsal (distal tarsal IV) (different from Largocephalosaurus, which possesses two distal tarsals – III and IV) (number of tarsals unknown in Sinosaurosphargis). |
Measurements
No measurements are available
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| Source: subc = subclass, subp = subphylum, p = phylum | |||||
| References: Carroll 1988, Kiessling 2004 | |||||