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Thalassemys
Taxonomy
Thalassemys was named by Rütimeyer (1859).
It was assigned to Emydidae by Rütimeyer (1873); to Acichelyidae by Lydekker (1889); to Thalassemyidae by Carroll (1988); to Plesiochelydiae by Milner (2004); to Pancryptodira by Danilov and Parham (2008); to Testudines by Anquetin et al. (2009); to Testudines by Pérez-García and Murelaga (2013), Perea et al. (2014); to Eucryptodira by Joyce (2007), Pérez-García et al. (2008), Mateus et al. (2009), Puntener et al. (2014), Pérez-García (2015); to Thalassemydidae by Bräm (1965), Lapparent de Broin et al. (1996), Karl et al. (2012), Anquetin et al. (2014), Puntener et al. (2015), Anquetin et al. (2017); and to Thalassochelydia by Joyce et al. (2021).
It was assigned to Emydidae by Rütimeyer (1873); to Acichelyidae by Lydekker (1889); to Thalassemyidae by Carroll (1988); to Plesiochelydiae by Milner (2004); to Pancryptodira by Danilov and Parham (2008); to Testudines by Anquetin et al. (2009); to Testudines by Pérez-García and Murelaga (2013), Perea et al. (2014); to Eucryptodira by Joyce (2007), Pérez-García et al. (2008), Mateus et al. (2009), Puntener et al. (2014), Pérez-García (2015); to Thalassemydidae by Bräm (1965), Lapparent de Broin et al. (1996), Karl et al. (2012), Anquetin et al. (2014), Puntener et al. (2015), Anquetin et al. (2017); and to Thalassochelydia by Joyce et al. (2021).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1859 | Thalassemys Rütimeyer |
| 1873 | Thalassemys Rütimeyer p. 27 |
| 1889 | Thalassemys Lydekker p. 148 |
| 1965 | Thalassemys Bräm p. 142 |
| 1984 | Parathalassemys Nessov and Krassevskaya |
| 1988 | Thalassemys Carroll |
| 1996 | Thalassemys Lapparent de Broin et al. p. 557 |
| 2000 | Parathalassemys Sukhanov p. 326 |
| 2003 | Parathalassemys Parham and Hutchison p. 784 |
| 2004 | Thalassemys Milner p. 1460 |
| 2007 | Thalassemys Joyce |
| 2008 | Thalassemys Danilov and Parham |
| 2008 | Thalassemys Pérez-García et al. |
| 2009 | Thalassemys Anquetin et al. |
| 2009 | Thalassemys Mateus et al. |
| 2012 | Thalassemys Karl et al. |
| 2013 | Thalassemys Pérez-García and Murelaga |
| 2014 | Thalassemys Anquetin et al. |
| 2014 | Thalassemys Perea et al. |
| 2014 | Thalassemys Puntener et al. |
| 2015 | Thalassemys Puntener et al. |
| 2015 | Thalassemys Pérez-García |
| 2017 | Thalassemys Anquetin et al. |
| 2021 | Thalassemys Joyce et al. |
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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. †Thalassemys Rütimeyer 1859
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†Thalassemys bruntrutana Puntener et al. 2015
†Thalassemys carva Nessov 1984
†Thalassemys hugii Rütimeyer 1873
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Invalid names: Eurysternum ignoratum Bräm 1965 [synonym], Thalassemys gresslyi Rütimeyer 1873 [synonym]
Invalid names: Parathalassemys Nessov and Krassevskaya 1984 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Anquetin et al. 2017 | Thalassemys can tentatively be diagnosed as a repre- sentative of Thalassochelydia, but the presence of three cervicals is suspected in some individuals. Thalassemys is currently differ- entiated from other thalassochelydians by a large size (carapace length greater than 600 mm), absence of nuchal notch, clearly visible linear striations perpendicular to most shell sutures, retention of reduced costo-peripheral fontanelles in adults, an osseous bridge in adults, vertebral scutes with anterolaterally concave and posterolaterally convex margins, lateral plastral fontanelles, a tendency toward the reduction of sutural contacts between hyoplastra and anterior plastral elements, and a wide scapular angle (usually more than 110°). |