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Testudo brontops
Taxonomy
Testudo brontops was named by Marsh (1890). Its type specimen is YPM VP 000608 (holotype), a shell, and it is a 3D body fossil. Its type locality is Indian Creek (Testudo brontops type locality), which is in a Chadronian terrestrial horizon in the Chadron Formation of South Dakota.
It was recombined as Testudo (Hesperotestudo) brontops by Williams (1950), Williams (1953); it was recombined as Geochelone (Hesperotestudo) brontops by Auffenberg (1963); it was recombined as Hesperotestudo brontops by Hutchison (1996).
It was recombined as Testudo (Hesperotestudo) brontops by Williams (1950), Williams (1953); it was recombined as Geochelone (Hesperotestudo) brontops by Auffenberg (1963); it was recombined as Hesperotestudo brontops by Hutchison (1996).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1890 | Testudo brontops Marsh p. 179 figs. Pl. 8 |
| 1902 | Testudo brontops Hay p. 451 |
| 1904 | Testudo brontops Hay |
| 1930 | Testudo brontops Hay p. 103 |
| 1950 | Testudo (Hesperotestudo) brontops Williams p. 20 |
| 1953 | Testudo (Hesperotestudo) brontops Williams p. 544 |
| 1963 | Geochelone (Hesperotestudo) brontops Auffenberg p. 87 |
| 1996 | Hesperotestudo brontops Hutchison p. 345 |
| 2018 | Testudo brontops Vlachos |
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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.
†Testudo brontops Marsh 1890
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Vlachos 2018 | “Testudo” brontops can be diagnosed as a member of Testudinidae based on the coincidence between the pleuro-marginal sulci and the costo-peripheral suture, the fused marginals XII, the well-differentiated neural series, and the presence of a well-developed epiplastral lip. “Testudo” brontops can be differentiated from stem and basal testudinids (e.g., Hadrianus, Oligopherus) based on the 4<8<4<8 anterior neural formula. “Testudo” brontops can be differentiated from other testudinids with a cervical scute (e.g., Gopherus, Stylemys, Hesperotestudo) based on the medially convex humero-pectoral sulcus that overlaps the posterior part of the entoplastron. |
Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988, Ernst and Barbour 1989 | |||||
Age range: Chadronian or 37.00000 to 33.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chadronian | USA (South Dakota) | Testudo brontops (type locality: 191398) |