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Psilosemys wyomingensis
Taxonomy
Psilosemys wyomingensis was named by Hutchison (2013). Its type specimen is UCMP 179440, a partial skeleton (fragmentary shell including anterior lobe of plastron and fragments of posterior lobe, nuchal and peripherals 1–3, 6–8, parts of costals 1–3, 6, and neurals 1 a), and it is a 3D body fossil. Its type locality is Fifteenmile Creek 15, which is in a Wasatchian terrestrial horizon in the Willwood Formation of Wyoming. It is the type species of Psilosemys.
Entered
by P. Holroyd on 2015-04-19
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.
†Psilosemys wyomingensis Hutchison 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Vlachos 2018 | Psilosemys wyomingensis can be diagnosed as a member of Pan-Testudinoidea based an extensive visceral covering of the plastral scales, the presence of inguinal and axillary scutes, and well-developed axillary and inguinal buttresses and as a member of Pan-Emydidae based on the absence of musk duct foramina, expansion of vertebral V onto the pygal, and presence of paired marginals XII. Psilosemys wyomingensis differs from other members of Pan-Emydidae by the following combination of characters: pleural I that cover the lateral parts of the nuchal, pectorals located posterior to entoplastron, plastral buttress only reaching the costals, carapace only weakly sculpted at most, costal V shorter distally than costal VI, and presence of a small and narrow inguinal. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009, Kiessling 2004, Uetz 2005 | |||||
Age range: base of the Lysitean to the top of the Lostcabinian or 56.00000 to 51.10000 Ma
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lysitean - Lostcabinian | USA (Wyoming) | Psilosemys wyomingensis (15451) | |
| Wasatchian | USA (Wyoming) | Emydidae indet. P (15488 59896 59897) Psilosemys wyomingensis (15509 168289 type locality: 168290 168307 168308 168309 168314 168315 168322 168323 168324 168325 168326 168327 168329) |