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Emys wyomingensis
ATTENTION: This is a Taxon that could easily tangled with Emys wyomingensis ( Echmatemys wyomingensis) has been named in Leidy (1869) based on a left epiplastron. One year later, Leidy (1870a) named Baptemys wyomingensis from the same locality, based on an almost complete shell (Leidy 1873, pl. 11). Leidy (1870a) raised some doubts on the validity of Emys wyomingensis by saying that the epiplastron could belong the same animal as Baptemys wyomingensis. I am not sure if by that he meant the same individual or the same species, but the epiplastron of Emys wyomingensis is certainly a pan-testudinoid and clearly distinct from Baptemys. In the same year, Cope (186970) already suggested the synonymy between the two species, and placed them under Adocus. But shortly after, Leidy (1873) and Hay (1908) provided further evidence on the distinction of these two species. However, in the literature these taxa often get confused.
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| Year | Name and author |
|---|---|
| 1869 | Emys wyomingensis Leidy p. 66 |
| 1870 | Emys wyomingensis Cope |
| 1870 | Emys wyomingensis Leidy p. 5 figs. not figued |
| 1873 | Baena ponderosa Cope p. 624 |
| 1873 | Emys wyomingensis Leidy p. 140 |
| 1878 | Emys wyomingensis Osborn et al. |
| 1882 | Emys wyomingensis Cope |
| 1884 | Baena ponderosa Cope |
| 1884 | Emys wyomingensis Cope |
| 1902 | Baena ponderosa Hay p. 438 |
| 1902 | Emys wyomingensis Hay p. 448 |
| 1904 | Emys wyomingensis Hay |
| 1908 | Emys wyomingensis Hay pp. 270-271 figs. Plate 37, figs. II-13; plate 38, fig. 10; plate 40, fig. 1; plate 41, figs, i, 2; text-figs. 337-345 |
| 1908 | Baptemys fluviatilis Hay p. 277 figs. Plate 42, figs. I, 2; teit-figs. 350, 351 |
| 1908 | Echmatemys uintensis Hay pp. 342-343 |
| 1915 | Echmatemys uintensis Gilmore p. 127 |
| 1930 | Baptemys fluviatilis Hay p. 92 |
| 1930 | Echmatemys uintensis Hay p. 96 |
| 1945 | Emys wyomingensis Gilmore p. 105 |
| 2000 | Emys wyomingensis Zonneveld et al. |
| 2015 | Emys wyomingensis Bourque et al. |
| 2016 | Emys wyomingensis Joyce and Bourque |
| 2018 | Emys wyomingensis Vlachos |
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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.
| Reference | Diagnosis | |
|---|---|---|
| J. R. Bourque et al. 2015 | Carapace unicarinate; xiphiplastra
curved convexly at outer margins; plastral forelobe broad; plastral hindlobe lobate and lacking caudal notch; entoplastron wider than long, with gular–humeral sulcus positioned halfway or on posterior two-thirds of element. | |
| E. Vlachos 2018 | Echmatemys wyomingensis can be diagnosed as a member of Echmatemys based on the characters mentioned above. Echmatemys wyomingensis differs from other Echmatemys based on the following combination of characters: presence of an octagonal neural (V or VI), presence of nine neurals, short contact between marginal I and pleural I, no contact between vertebral I and marginal II, and pectorals covering only the posterior part of the entoplastron. |
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| Source: f = family, c = class, subp = subphylum | |||||
| References: Uetz 2005, Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Middle Eocene to the top of the Bridgerian or 47.80000 to 46.20000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bridgerian | USA (Wyoming) | Chrysemys wyomingensis (16284) Emys wyomingensis (16211 type locality: 128447 130809) | |
| Middle Eocene | USA (Wyoming) | Emys wyomingensis (81455) |