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Echmatemys stevensoniana
Taxonomy
Emys stevensonianus was named by Leidy (1870). Its type specimen is USNM 963+965+967 (syntypes), a partial shell, and it is a 3D body fossil. Its type locality is A few miles from Fort Bridger, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
It was synonymized subjectively with Emys wyomingensis by Leidy (1873); it was recombined as Echmatemys stevensoniana by Hay (1930) and Vlachos (2018).
It was synonymized subjectively with Emys wyomingensis by Leidy (1873); it was recombined as Echmatemys stevensoniana by Hay (1930) and Vlachos (2018).
Synonyms
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Synonymy list
Year | Name and author |
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1870 | Emys stevensonianus Leidy p. 6 |
1873 | Emys septarius Cope p. 625 |
1875 | Emys stevensonianus Cope p. 36 |
1882 | Emys septaria Cope p. 992 |
1884 | Emys septaria Cope p. 139 |
1902 | Emys septaria Hay p. 448 |
1906 | Echmatemys septaria Hay p. 27 |
1908 | Echmatemys ocyrrhoe Hay |
1908 | Echmatemys septaria Hay p. 319 |
1908 | Echmatemys aegle Hay p. 346 |
1908 | Echmatemys cyane Hay p. 346 |
1908 | Echmatemys ocyrrhoe Hay p. 346 |
1930 | Echmatemys aegle Hay p. 95 |
1930 | Echmatemys cyane Hay p. 95 |
1930 | Echmatemys ocyrrhoe Hay p. 95 |
1930 | Echmatemys septaria Hay p. 95 |
1930 | Echmatemys stevensoniana Hay p. 96 |
1962 | Echmatemys septaria Roberts p. 386 |
2000 | Echmatemys septaria Zonneveld et al. |
2018 | Echmatemys stevensoniana 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.
†Echmatemys stevensoniana Leidy 1870
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Invalid names: Echmatemys aegle Hay 1908 [synonym], Echmatemys cyane Hay 1908 [synonym], Echmatemys ocyrrhoe Hay 1908 [synonym], Emys septarius Cope 1873 [synonym]
Diagnosis
Reference | Diagnosis | |
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E. Vlachos 2018 | Echmatemys stevensoniana can be diagnosed as a member of Echmatemys based on the characters listed for that clade above. Echmatemys stevensoniana differs from other Echmatemys based on the following combination of characters: neurals II–VIII hexagonal, suprapygal longer than wide and with narrow anterior border, contact of marginal II with vertebral I, and vertebral IV/V sulcus crossing suprapygal I. |