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Stylemys nebrascensis
Taxonomy
Stylemys nebrascensis was named by Leidy (1851). Its type specimen is USNM 97, a partial shell, and it is a 3D body fossil. Its type locality is White River Badlands (coll. D.D. Owen, USNM, St. nebrascensis type locality), which is in a Rupelian terrestrial horizon in the Brule Formation of South Dakota. It is the type species of Testudo (Stylemys).
It was recombined as Testudo nebrascensis by Leidy (1851), Leidy (1852), Leidy (1853), Leidy (1857) and Leidy (1873).
It was recombined as Testudo nebrascensis by Leidy (1851), Leidy (1852), Leidy (1853), Leidy (1857) and Leidy (1873).
Synonyms
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Synonymy list
Year | Name and author |
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1851 | Stylemys nebrascensis Leidy |
1851 | Emys hemispherica Leidy p. 173 |
1851 | Stylemys nebrascensis Leidy p. 173 |
1851 | Testudo lata Leidy p. 173 |
1851 | Testudo nebrascensis Leidy p. 173 |
1851 | Emys oweni Leidy pp. 327-328 |
1852 | Testudo culbertsonii Leidy |
1852 | Testudo hemispherica Leidy |
1852 | Testudo nebrascensis Leidy |
1852 | Testudo oweni Leidy |
1852 | Emys culbertsonii Leidy p. 34 |
1853 | Testudo culbertsonii Leidy |
1853 | Testudo hemispherica Leidy |
1853 | Testudo lata Leidy |
1853 | Testudo nebrascensis Leidy |
1853 | Testudo oweni Leidy |
1857 | Testudo nebrascensis Leidy p. 90 |
1873 | Testudo amphithorax Cope |
1873 | Testudo ligonius Cope |
1873 | Testudo amphithorax Cope p. 19 |
1873 | Testudo ligonius Cope p. 19 |
1873 | Testudo nebrascensis Leidy p. 339 |
1884 | Stylemys nebrascensis Cope |
1889 | Stylemys nebrascensis Lydekker p. 94 |
1891 | Stylemys nebrascensis Cope p. 5 |
1902 | Stylemys nebrascensis Hay p. 450 |
1902 | Testudo amphithorax Hay p. 451 |
1902 | Testudo ligonia Hay p. 451 |
1908 | Stylemys nebrascensis Hay |
1908 | Testudo emiliae Hay p. 419 |
1908 | Stylemys nebrascensis Lambe |
1913 | Stylemys nebrascensis Lambe |
1925 | Stylemys nebrascensis Case p. 87 |
1930 | Stylemys nebrascensis Hay p. 101 |
1930 | Testudo amphithorax Hay p. 102 |
1930 | Testudo emiliae Hay p. 103 |
1930 | Testudo ligonia Hay p. 104 |
1936 | Stylemys nebrascensis Case p. 87 |
1950 | Testudo (Hesperotestudo) ligonia Williams p. 25 |
1953 | Testudo (Hesperotestudo) amphithorax Williams p. 544 |
1961 | Gopherus neglectus Brattstrom p. 544 |
1963 | Geochelone (Hesperotestudo) amphithorax Auffenberg p. 87 |
1963 | Geochelone (Caudochelys) ligonia Auffenberg p. 93 |
1963 | Gopherus emiliae Auffenberg p. 94 |
1964 | Stylemys amphithorax Auffenberg p. 323 |
1964 | Stylemys nebrascensis Auffenberg p. 323 |
1982 | Stylemys emiliae Bramble p. 854 |
1982 | Stylemys neglectus Bramble p. 854 |
1996 | Stylemys amphithorax Hutchison p. 346 |
1996 | Stylemys nebrascensis Hutchison p. 347 |
1998 | Stylemys nebrascensis Wall and Maddox p. 11 |
2018 | Stylemys nebrascensis Vlachos |
2018 | Stylemys nebrascensis Vlachos and Rabi p. 663 |
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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.
†Stylemys nebrascensis Leidy 1851
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Invalid names: Emys culbertsonii Leidy 1852 [synonym], Emys hemispherica Leidy 1851 [synonym], Emys oweni Leidy 1851 [synonym], Gopherus neglectus Brattstrom 1961 [synonym], Testudo amphithorax Cope 1873 [synonym], Testudo emiliae Hay 1908 [synonym], Testudo lata Leidy 1851 [synonym], Testudo ligonius Cope 1873 [synonym]
Diagnosis
Reference | Diagnosis | |
---|---|---|
J. Leidy 1852 (Testudo culbertsonii) | Dr. Leidy stated that he had been studying the characters of the fossil tortoises from Nebraska Territory, and had come to the conclusion that they had been terrestrialandnotaquaticintheirhabits,andbelongedtothegenusTestudo. Inall, the penultimate vertebral plate is inverted V formed,enclosing with the pygal plate the last vertebral plate; the costal plates are alternately broad and narrow; and in those specimens in which the marks of the pygal scute remains, it is undivided, as in the recent Testudo. | |
J. Leidy 1852 (Testudo oweni) | Dr. Leidy stated that he had been studying the characters of the fossil tortoises from Nebraska Territory, and had come to the conclusion that they had been terrestrialandnotaquaticintheirhabits,andbelongedtothegenusTestudo. Inall, the penultimate vertebral plate is inverted V formed,enclosing with the pygal plate the last vertebral plate; the costal plates are alternately broad and narrow; and in those specimens in which the marks of the pygal scute remains, it is undivided, as in the recent Testudo. | |
J. Leidy 1852 | Dr. Leidy stated that he had been studying the characters of the fossil tortoises from Nebraska Territory, and had come to the conclusion that they had been terrestrial and not aquatic in their habits,andbelongedtothegenusTestudo. In all, the penultimate vertebral plate is inverted V formed,enclosing with the pygal plate the last vertebral plate; the costal plates are alternately broad and narrow; and in those specimens in which the marks of the pygal scute remains, it is undivided, as in the recent Testudo. | |
J. Leidy 1852 (Testudo hemispherica) | Dr. Leidy stated that he had been studying the characters of the fossil tortoises from Nebraska Territory, and had come to the conclusion that they had been terrestrialandnotaquaticintheirhabits,andbelongedtothegenusTestudo. Inall, the penultimate vertebral plate is inverted V formed,enclosing with the pygal plate the last vertebral plate; the costal plates are alternately broad and narrow; and in those specimens in which the marks of the pygal scute remains, it is undivided, as in the recent Testudo. | |
E. Vlachos 2018 | Stylemys nebrascensis can be diagnosed as a member of Stylemys based on the characters listed above. Stylemys nebrascensis can be differentiated from other Stylemys based on the presence of a premaxillae ridge with a corresponding dentary symphyseal groove, a neural pattern of 4>6A>6A>6A>6A>6A>6A>6A, weakly-developed epiplastral lip with absent or shallow epiplastral excavation, and a humero-pectoral sulcus that is situated posterior to the entoplastron and that is medially straight and anterolaterally convex. |