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Pseudemys williamsi
Taxonomy
Chrysemys williamsi was named by Rose and Weaver (1966). Its type specimen is UF 11561, a shell, and it is a 3D body fossil. Its type locality is McGehee Farm, which is in a Hemphillian terrestrial horizon in the Alachua Formation of Florida.
It was recombined as Pseudemys williamsi by Vlachos (2018), Weems (2023).
It was recombined as Pseudemys williamsi by Vlachos (2018), Weems (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1966 | Chrysemys williamsi Rose and Weaver |
| 2018 | Pseudemys williamsi Vlachos |
| 2023 | Pseudemys williamsi Weems |
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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.
†Pseudemys williamsi Rose and Weaver 1966
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Vlachos 2018 | Pseudemys williamsi can be diagnosed as a member of Emydidae and Pseudemys by the full list of shell characters listed for those clades above. Pseudemys williamsi resembles Pseudemys concinna in the presence of a short, viscerally-overlapped cervical onto the nuchal and short gular overlap on the entoplastron, but differs in the presence of an unnotched pygal and unserrated peripherals. | |
| R. E. Weems 2023 | Nuchal with characteristic P. williamsi conformation. Costals and peripherals have a nearly smooth, dense external surface with prominent sulcal grooves that mark the borders of dermal scutes.
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Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009, Uetz 2005 | |||||
Age range: base of the Late/Upper Clarendonian to the top of the Hemphillian or 12.50000 to 4.70000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Clarendonian | USA (Florida) | Pseudemys williamsi (18554) | |
| Hemphillian | USA (Florida) | Chrysemys williamsi (type locality: 18560) | |
| early Early Hemphillian - late Early Hemphillian | USA (Florida) | Pseudemys williamsi (18539) |