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Echmatemys arethusa
Taxonomy
Echmatemys arethusa was named by Hay (1908). Its type specimen is AMNH 5920 (holotype), a partial shell, and it is a 3D body fossil. Its type locality is Grizzly Buttes, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
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.
†Echmatemys arethusa Hay 1908
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Vlachos 2018 | Echmatemys arethusa can be diagnosed as a member of Echmatemys based on the characters mentioned above. Echmatemys arethusa differs from other Echmatemys based on the following combination of characters: hexagonal neurals with short antero-lateral sides, lack of contact between vertebral I and marginal II, lack of overlap of pleural I onto the nuchal, and entoplastron covered both by the gulars and pectorals. |
Measurements
No measurements are available
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| Source: g = genus, subo = suborder, c = class, subp = subphylum | |||||
| References: Carroll 1988, Holroyd et al. 2001, Hendy et al. 2009, Uetz 2005 | |||||
Age range: Bridgerian or 50.30000 to 46.20000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bridgerian | USA (Wyoming) | Echmatemys arethusa (type locality: 16228) |