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Hesperotestudo ducateli
Taxonomy
Testudo ducateli was named by Collins and Lynn (1936). Its type specimen is USNM 13783, a shell (partial plastron), and it is a 3D body fossil. Its type locality is Chesapeake Beach Road Cut, Zone 10, which is in a Langhian marine horizon in the Calvert Formation of Maryland.
It was recombined as Testudo (Hesperotestudo) ducatelli by Williams (1953); it was recombined as Geochelone ducateli by Zug (2001); it was considered a nomen dubium by Auffenberg (1963); it was recombined as Hesperotestudo ducateli by Vlachos (2018) and Weems (2023).
It was recombined as Testudo (Hesperotestudo) ducatelli by Williams (1953); it was recombined as Geochelone ducateli by Zug (2001); it was considered a nomen dubium by Auffenberg (1963); it was recombined as Hesperotestudo ducateli by Vlachos (2018) and Weems (2023).
Synonymy list
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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.
†Hesperotestudo ducateli Collins and Lynn 1936
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Diagnosis
Reference | Diagnosis | |
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E. Vlachos 2018 | Hesperotestudo ducateli can be diagnosed as a member of Hesperotestudo based on the characters listed above. Hesperotestudo ducateli differs from other Hesperotestudo in the presence of a pentagonal entoplastron. | |
R. E. Weems 2023 | Relatively small tortoise, with an estimated carapace length of about 25 cm. The only preserved neural is the second; it is wider than long, about 4 mm thick, and octagonal in outline. Anterior costals elongate, about 7 mm thick, and bear distinct sulcal grooves; peripherals also elongate in characteristic testudinid fashion; sulcal grooves on the carapace well developed except for the groove that separates the costal and marginal scutes that follows the costoperipheral suture quite closely. Carapace rather high and tumid. Plastron typically 15 to 20 mm thick but ranges up to 40 mm near the inguinal buttresses and down to 4 mm near the hyoplastral-hypoplastral suture. There is a well-developed anal notch, a slightly projecting epiplastral lip, and a firm and extended articulation with the carapace. The anterior end of the plastron is strongly curved upward, and the dorsal surface of the epiplastral lip is almost horizontal. The ventral surface of the plastron is markedly concave just in front of the inguinal notches, and the corresponding visceral surface is elevated, suggesting the type individual was a male. |
Measurements
No measurements are available
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Source: f = family, c = class, subp = subphylum | |||||
References: Hendy et al. 2009, Ernst and Barbour 1989, Carroll 1988 |