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Trionyx robustus
Taxonomy
Plastomenus robustus was named by Gilmore (1919). Its type specimen is USNM 8538, a partial shell, and it is a 3D body fossil. Its type locality is Kimbetoh West [USNM], which is in a Campanian terrestrial horizon in the Kirtland Formation of New Mexico.
It was recombined as Aspideretoides robustus by Sullivan et al. (2012); it was recombined as Trionyx robustus by Vitek and Joyce (2015).
It was recombined as Aspideretoides robustus by Sullivan et al. (2012); it was recombined as Trionyx robustus by Vitek and Joyce (2015).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1919 | Plastomenus robustus Gilmore p. 53 figs. Pl. 17, 18:1 |
| 1930 | Plastomenus robustus Hay p. 107 |
| 1935 | Aspideretes ovatus Gilmore p. 182 figs. 15, Pl. 18:1 |
| 2012 | Aspideretoides robustus Sullivan et al. p. 356 |
| 2015 | Trionyx robustus 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.
†Trionyx robustus Gilmore 1919
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Invalid names: Aspideretes ovatus Gilmore 1935 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. M. Sullivan et al. 2012 | Differs from Aspideretoides splendidus (Hay 1908) in the xiphipastron having a broader medial contact with the anterior portions arched forward, and a broad contact with the posterior margins of the hypoplastra. Differs from Aspideretoides austerus in having a broader hypoplastron; and the posterior margin of the hypoplastron deep,
resulting in a more acute margin than in A. splendidus and A. austerus. Lateral and medial margins of the hypoplastron and hyoplastron directed anteroposteriorly and subparallel. |