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Trachydermochelys phlyctaenus
Taxonomy
Trachydermochelys phlyctaenus was named by Seeley (1869). Its type specimen is CAMSM 56340–6, a partial shell (seven peripheral plates), and it is a 3D body fossil. Its type locality is Cambridge Greensand [non-specific locality data], which is in an Albian open shallow subtidal marl in the West Melbury Marly Chalk Formation of the United Kingdom.
It was synonymized subjectively with Plastremys lata by Seeley (1869); it was considered a nomen nudum by Joyce (2017).
It was synonymized subjectively with Plastremys lata by Seeley (1869); it was considered a nomen nudum by Joyce (2017).
Synonymy list
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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.
†Trachydermochelys phlyctaenus Seeley 1869
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. G. Joyce 2022 | Trachydermochelys phlyctaenus can be diagnosed as a representative of Helochelydridae by the presence of a shell surface texture consisting of raised tubercles, a thickened epiplastral lip, and an enlarged entoplastron with raised interclavicular ossification on its dorsal surface. Trachydermochelys phlyctaenus resembles the roughly coeval Helochelys danubina and the somewhat older Helochelydra nopcsai by having a tubercle density of approximately 8–10 per linear centimeter, but the tubercles differ by being lower, less circular, and distinct. The surface texture of the roughly coeval Plastremys lata consists of low welts only while that Plastremys rutteri is similarly distinct, but significantly coarser |