Reptilia - Testudines - Testudinidae
Alternative combination: Testudo nebrascensis
Synonyms: Emys culbertsonii Leidy 1852, Emys hemispherica Leidy 1851, Emys oweni Leidy 1851, Geochelone (Caudochelys) ligonia Cope 1873, Geochelone (Hesperotestudo) amphithorax Cope 1873, Gopherus emiliae Hay 1908, Gopherus neglectus Brattstrom 1961, Stylemys amphithorax Cope 1873, Stylemys neglectus Brattstrom 1961, Testudo (Hesperotestudo) amphithorax Cope 1873, Testudo (Hesperotestudo) ligonia Cope 1873, Testudo amphithorax Cope 1873, Testudo culbertsonii Leidy 1852, Testudo emiliae Hay 1908, Testudo hemispherica Leidy 1851, Testudo lata Leidy 1851, Testudo ligonia Cope 1873, Testudo ligonius Cope 1873, Testudo oweni Leidy 1851
Full reference: J. Leidy. 1851. [Description of a new fossil tortoise from Nebraska territory]. Proceedings of the Academy of Natural Sciences of Philadelphia 5:172-173
Belongs to Stylemys according to E. Vlachos and M. Rabi 2018
See also Auffenberg 1963, Auffenberg 1964, Bramble 1982, Brattstrom 1961, Case 1925, Case 1936, Cope 1873, Cope 1891, Hay 1902, Hay 1908, Hay 1930, Hutchison 1996, Lambe 1908, Lambe 1913, Leidy 1851, Leidy 1851, Leidy 1852, Leidy 1852, Leidy 1853, Leidy 1857, Leidy 1873, Lydekker 1889, Vlachos 2018, Wall and Maddox 1998 and Williams 1953
Sister taxa: Stylemys bottii, Stylemys capax, Stylemys frizaciana, Stylemys gisellae, Stylemys inusitata, Stylemys karakolensis, Stylemys oregonensis, Stylemys pygmea, Testudo niobrarensis
Type specimens:
- Stylemys nebrascensis: USNM 97, a partial shell. 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.
- Emys culbertsonii: USNM V 2348, a shell. 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.
- Emys hemispherica: USNM V 98, a partial shell. 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.
- Emys oweni: USNM V 95, a partial shell. 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.
- Gopherus neglectus: LACM-CIT 126/1672, a partial shell (entire shell except for the posterior one-fourth of the carapace). Its type locality is Kew Quarry, which is in a Whitneyan/Arikareean terrestrial claystone/sandstone in the Sespe Formation of California.
- Testudo amphithorax: AMNH No. 1145, a partial shell (carapacial and plastral fragments). Its type locality is Horsetail Creek, which is in a Chadronian terrestrial horizon in the White River Formation of Colorado.
- Testudo emiliae: AMNH 6135, a partial shell. Its type locality is AMNH Rosebud 5, which is in a Harrisonian terrestrial horizon in the Rosebud Formation of South Dakota.
- Testudo lata: ANSP 10072, a partial shell. 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.
- Testudo ligonius: AMNH No. 1148, a partial shell (carapacial and plastral fragments). Its type locality is Horsetail Creek, which is in a Chadronian terrestrial horizon in the White River Formation of Colorado.
Ecology: ground dwelling herbivore-herbivore
Distribution:
• Harrisonian of United States (1: South Dakota collection)
• Oligocene of United States (7: California, Nebraska, South Dakota, Wyoming)
• Eocene to Oligocene of United States (1: Nebraska)
• Eocene of Canada (1: Saskatchewan), United States (4: Colorado, Nebraska)
Total: 14 collections including 19 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.