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Polysternon
Taxonomy
Polysternon was named by Portis (1882). It is not extant.
It was assigned to Pelomedusidae by Carroll (1988); to Panpodocnemidae by Cadena et al. (2012); to Bothremydidae by Tong and Gaffney (2000) and de la Fuente et al. (2014); and to Foxemydina by Gaffney et al. (2006), Marmi et al. (2012) and Pérez-García (2016).
It was assigned to Pelomedusidae by Carroll (1988); to Panpodocnemidae by Cadena et al. (2012); to Bothremydidae by Tong and Gaffney (2000) and de la Fuente et al. (2014); and to Foxemydina by Gaffney et al. (2006), Marmi et al. (2012) and Pérez-García (2016).
Synonymy list
| Year | Name and author |
|---|---|
| 1882 | Polysternon Portis |
| 1988 | Polysternon Carroll |
| 2000 | Polysternon Tong and Gaffney p. 10 figs. 1-2 |
| 2006 | Polysternon Gaffney et al. p. 66 |
| 2012 | Polysternon Cadena et al. |
| 2012 | Polysternon Marmi et al. |
| 2014 | Polysternon de la Fuente et al. |
| 2016 | Polysternon Pérez-García |
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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. †Polysternon Portis 1882
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. S. Gaffney et al. 2006 | A bothremydid pleurodire of the subtribe Foxemydina with the following characters differentiating it from Foxemys: fossa pterygoidea present but not as deep as in Foxemys; condylus mandibularis anterior to main body of basisphenoid and well anterior to condylus occipitalis; orbital rim high in contrast to Foxemys; triturating surfaces triangular and wider than in Taphrosphyini but narrower than in Foxemys, Bothremys, and Chedighaii; shell similar to Foxemys but with parallel striations on the carapace, nuchal emargination present, round lateral borders of posterior lobe of plastron, and a narrow anal notch. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988, Uetz 2005 | |||||
Age range: base of the Maastrichtian to the top of the Early/Lower Maastrichtian or 72.10000 to 66.00000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Campanian - Maastrichtian | Spain (Vasco-Cantabrica) | P. sp. (208188 208189) | |
| Early/Lower Campanian | France (Provence-Alpes-Côte d'Azur) | Elochelys major (114968) Pleurosternon provinciale (114967) P. sp. (220117) | |
| Early/Lower Campanian | France (Languedoc-Roussillon) | P. provinciale (47782) | |
| Early/Lower Campanian | France | P. provinciale (83309) | |
| Late/Upper Campanian | France (Provence-Alpes-Côte d'Azur) | Testudinata indet. (220134) | |
| Middle Campanian | France (Provence-Alpes-Côte d'Azur) | P. sp. (48849) | |
| Middle Campanian - Late/Upper Campanian | France (Languedoc-Roussillon) | P. sp. (74660) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | France (Languedoc-Roussillon) | P. provinciale (88584) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Spain (Valencia) | P. sp. (53918) | |
| Maastrichtian | France (Provence-Alpes-Côte d'Azur) | P. provinciale (51692) | |
| Early/Lower Maastrichtian | France (Provence-Alpes-Côte d'Azur) | P. sp. (47893) | |
| Late/Upper Maastrichtian | Spain (Aragón) | P. sp. (45437 45438 45439 45440) |