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Ashleychelys palmeri
Taxonomy
Ashleychelys palmeri was named by Weems and Sanders (2014). Its type specimen is ChM PV7002, a skeleton (a largely complete skeleton including the skull, lower jaw, much of the carapace and the plastron, girdle elements, humerus, and femur), and it is a 3D body fossil. Its type locality is Limehouse Branch, east bank, which is in a Rupelian offshore shelf marl in the Ashley Formation of South Carolina. It is the type species of Ashleychelys.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Ashleychelys palmeri Weems and Sanders p. 84 figs. Figs. 9–15, S1–S3 |
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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.
†Ashleychelys palmeri Weems and Sanders 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. E. Weems and A. E. Sanders 2014 | Moderately large sea turtle with a flattened and elongated skull and an anteroposteriorly elongated orbit; pre- frontals form the anterodorsal border of the orbit, whereas frontals form only a small portion of the dorsal rim of the or- bit; prominent brow ridges formed by the postorbitals lie above most of the dorsal rim of the orbit; quadrate turns strongly backward beneath squamosal; cavum tympani elongate, narrow, and tightly rounded at its posterior end; secondary palate mod- erately developed, with the vomer contributing about half of its length to the secondary palate; maxillary palate slightly ru- gose without pronounced troughs or ridges; pterygoid flanges ro- bustly developed; planar joint between the sixth and seventh cer- vical vertebrae; carapace moderately convex with a maximum length estimated to be about 55 cm, almost as wide as long, and with the third costals most elongate; vertebral scutes hexago- nal and about twice as wide as long; elongated costoperipheral fontanelles are persistently wide into adulthood; neurals exhibit a medial narrow low ridge unlike Carolinochelys wilsoni or Pro- colpochelys charlestonensis; carapace surface covered by an anastomosing pattern of grooves; hyoplastron and hypoplastron are angled sharply rather than gently upward away from the midline; xiphiplastra much narrower and longer than in P. charlestonensis; angle between scapular rods about 130◦; shaft of humerus very straight. |
Measurements
No measurements are available
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| Source: superf = superfamily, subo = suborder, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Bush and Bambach 2015, Uetz 2005, Carroll 1988 | |||||
Age range: base of the Late/Upper Oligocene to the top of the Chattian or 28.40000 to 23.03000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rupelian | USA (South Carolina) | Ashleychelys palmeri (type locality: 154345 154579) | |
| Late/Upper Oligocene | USA (Virginia) | Ashleychelys palmeri (167201) | |
| Chattian | USA (South Carolina) | Ashleychelys palmeri (60443) |