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Trionyx aequa
Taxonomy
Amyda aequa was named by Hay (1908). Its type specimen is USNM 6065, a partial shell, and it is a 3D body fossil. Its type locality is Opal [USGS], which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
It was recombined as Zangerlichelys aequa by Chkhikvadze (2000); it was recombined as Trionyx aequa by Vitek and Joyce (2015).
It was recombined as Zangerlichelys aequa by Chkhikvadze (2000); it was recombined as Trionyx aequa by Vitek and Joyce (2015).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Amyda aequa Hay |
| 1908 | Amyda crassa Hay p. 532 figs. Plate 108; text-fig. 692 |
| 1930 | Amyda aequa Hay p. 110 |
| 1930 | Amyda crassa Hay p. 111 |
| 2000 | Zangerlichelys aequa Chkhikvadze |
| 2015 | Trionyx aequa Vitek and Joyce |
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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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, subp = subphylum | |||||
| References: Ernst and Barbour 1989, Carroll 1988 | |||||
Age range: base of the Bridgerian to the top of the Uintan or 50.30000 to 39.70000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bridgerian | USA (Wyoming) | Amyda aequa (15837 16410 131939) | |
| Uintan | USA (Utah) | Amyda crassa (16657) |