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Tropidemys
Taxonomy
Tropidemys was named by Rütimeyer (1873).
It was assigned to Emydidae by Rütimeyer (1873), Portis (1878); to Acichelyidae by Lydekker (1889), Delair (1958); to Thalassemydidae by Bräm (1965); to Thalassemyidae by Carroll (1988); to Plesiochelyidae by Lapparent de Broin et al. (1996), Anquetin et al. (2014), Puntener et al. (2014), Pérez-García (2015), Anquetin et al. (2017); and to Thalassochelydia by Joyce and Mäuser (2020).
It was assigned to Emydidae by Rütimeyer (1873), Portis (1878); to Acichelyidae by Lydekker (1889), Delair (1958); to Thalassemydidae by Bräm (1965); to Thalassemyidae by Carroll (1988); to Plesiochelyidae by Lapparent de Broin et al. (1996), Anquetin et al. (2014), Puntener et al. (2014), Pérez-García (2015), Anquetin et al. (2017); and to Thalassochelydia by Joyce and Mäuser (2020).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1862 | Chelonia valanginiensis Pictet and Campiche |
| 1873 | Tropidemys Rütimeyer p. 40 |
| 1878 | Chelonides robusta Portis |
| 1878 | Tropidemys Portis p. 18 |
| 1889 | Tropidemys Lydekker pp. 155-156 |
| 1958 | Tropidemys Delair p. 55 |
| 1965 | Tropidemys Bräm p. 174 |
| 1988 | Tropidemys Carroll |
| 1996 | Tropidemys Lapparent de Broin et al. p. 557 |
| 2014 | Tropidemys Anquetin et al. |
| 2014 | Tropidemys Puntener et al. |
| 2015 | Tropidemys Pérez-García |
| 2017 | Tropidemys Anquetin et al. |
| 2020 | Tropidemys Joyce and Mäuser |
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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.
G. †Tropidemys Rütimeyer 1873
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†Tropidemys langii Rütimeyer 1873
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Invalid names: Craspedochelys plana Rütimeyer 1873 [synonym], Tropidemys expansa Rütimeyer 1873 [synonym], Tropidemys gibba Rütimeyer 1873 [synonym]
†Tropidemys seebachi Portis 1878
Invalid names: Chelonia valanginiensis Pictet and Campiche 1862 [nomen dubium], Chelonides robusta Portis 1878 [nomen dubium]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Anquetin et al. 2017 | Tropidemys can be diagnosed as a “plesiochelyid” by the full list of shell characters provided for that taxon above. Tropidemys is currently differentiated from all other “ple- siochelyids” by particularly thick shell bones, a posteriorly tec- tiform carapace, a greatly reduced or absent nuchal notch, keeled neurals (more pronounced posteriorly), wide and hexagonal intermediate and posterior neurals with anterolateral sides as long as posterolateral sides, retention of costo-peripheral fontanelles in juveniles (closed in adults), and narrow vertebral scutes. |