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Baptemys
Taxonomy
Baptemys was named by Leidy (1870). It was considered paraphyletic by Knauss et al. (2011).
It was assigned to Chelonia by Leidy (1873); to Adocidae by Hay (1902); to Dermatemydidae by Hay (1908), Hay (1930), Carroll (1988), Hutchison (1992), Holroyd et al. (2001), Joyce et al. (2004), Knauss et al. (2011), Bourque et al. (2015) and Lichtig and Lucas (2015); and to Pandermatemys by Joyce and Bourque (2016).
It was assigned to Chelonia by Leidy (1873); to Adocidae by Hay (1902); to Dermatemydidae by Hay (1908), Hay (1930), Carroll (1988), Hutchison (1992), Holroyd et al. (2001), Joyce et al. (2004), Knauss et al. (2011), Bourque et al. (2015) and Lichtig and Lucas (2015); and to Pandermatemys by Joyce and Bourque (2016).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1870 | Baptemys Leidy pp. 4-5 |
| 1872 | Notomorpha Cope p. 3 |
| 1872 | Notomorpha gravis Cope p. 5 |
| 1872 | Notomorpha Cope p. 474 |
| 1872 | Notomorpha gravis Cope p. 476 |
| 1873 | Emys gravis Cope |
| 1873 | Baptemys Leidy p. 341 |
| 1884 | Notomorpha gravis Cope |
| 1902 | Baptemys Hay p. 445 |
| 1902 | Notomorpha Hay p. 448 |
| 1902 | Notomorpha gravis Hay p. 448 |
| 1908 | Notomorpha Hay p. 269 |
| 1908 | Notomorpha gravis Hay p. 269 figs. Figs 335-336 |
| 1908 | Baptemys Hay p. 270 |
| 1930 | Baptemys Hay p. 92 |
| 1930 | Notomorpha Hay p. 92 |
| 1930 | Notomorpha gravis Hay p. 92 |
| 1988 | Baptemys Carroll |
| 1992 | Baptemys Hutchison |
| 2001 | Baptemys Holroyd et al. |
| 2004 | Baptemys Joyce et al. |
| 2011 | Baptemys Knauss et al. |
| 2015 | Baptemys Bourque et al. |
| 2015 | Gomphochelys Bourque et al. |
| 2015 | Notomorpha Bourque et al. |
| 2015 | Gomphochelys Bourque et al. p. 7 |
| 2015 | Baptemys Lichtig and Lucas |
| 2016 | Baptemys Joyce and Bourque |
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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. †Baptemys Leidy 1870
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†Baptemys garmanii Cope 1872
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Invalid names: Baptemys tricarinata Hay 1908 [synonym], Dermatemys costilata Cope 1875 [synonym]
†Baptemys nanus Bourque et al. 2015
Invalid names: Gomphochelys Bourque et al. 2015 [synonym], Notomorpha Cope 1872 [synonym], Notomorpha gravis Cope 1872 [nomen dubium]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. R. Bourque et al. 2015 | Carapace unicarinate; xiphiplastra
curved convexly at outer margins; plastral forelobe broad; plastral hindlobe lobate and lacking caudal notch; entoplastron wider than long, with gular–humeral sulcus positioned halfway or on posterior two-thirds of element. | |
| J. R. Bourque et al. 2015 (Gomphochelys) | Gomphochelys nanus differs from other dermatemydids
by the following: relatively small adult size for the family Dermatemydidae (carapace »32 cm long for UF 225761); bones of the shell robust with thickened peripherals and pygal (shared with Agomphus pectoralis); pygal lacks keel or crest (shared with Agomphus and Dermatemys mawii); posterior peripherals relatively straight and shortened (shared with A. pectoralis); marginal scutes short in dorsal aspect with narrow underlap ventrally (shared with A. pectoralis); plastral forelobes and hindlobes reduced; entoplastron reduced, about as wide as long or only slightly wider than long (shared with A. pectoralis); and gular– humeral sulcus positioned either along, just anterior to, or just posterior to the ento–hyoplastral suture. The following are synapomorphies of G. nanus and other dermatemydids: costiform processes extend across P1 and terminate in the anterior third of P2 (shared with some Notomorpha garmanii, Staurotypus, Claudius, and Hoplochelys); three pronounced longitudinal carinae on the dorsum of the carapace (shared with N. garmanii, Hoplochelys, and Agomphus alabamensis) composed of a set of rounded lateral carinae that extend from the posterior half of C1 to posterior-most C7, as well as a pronounced dorsally flattened medial keel that extends from the posterior N1 (at the intervertebral sulcus for V1–2), is interrupted at the V4–5 sulcus on N8, and terminates on the suprapygals (terminates on N8 in referred specimen UF 249085); pygal wider than long (it is longer than wide in most N. garmanii and in all Baptemys wyomingensis and Dermatemys examined); and xiphiplastron pointed and lacks caudal notch (shared with A. pectoralis, Hoplochelys, and N. garmanii). |
Measurements
No measurements are available
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| Source: g = genus, superf = superfamily, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Holroyd et al. 2001, Uetz 2005, Carroll 1988 | |||||
Age range: base of the Wasatchian to the top of the Duchesnean or 55.80000 to 37.00000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wasatchian | USA (North Dakota) | B. tricarinata (15895) | |
| Wasatchian | USA (New Mexico) | B. garmanii (176875 176893) | |
| Wasatchian | USA (Colorado) | B. sp. (176835 176836 176837) | |
| Wasatchian | USA (Wyoming) | B. sp. (15566 59894) Notomorpha gravis, Notomorpha garmanii (131859) | |
| Early/Lower Eocene | USA (Wyoming) | B. tricarinata (131862 131863) Gomphochelys nanus (176522) | |
| Wasatchian - Bridgerian | USA (New Mexico) | B. sp. (25762 25763) | |
| Late/Upper Uintan | USA (Texas) | B. sp. (16542) | |
| Duchesnean | USA (Utah) | B. sp. (16877) |