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Testudo hexagonata
Taxonomy
Testudo hexagonata was named by Cope (1893). Its type specimen is TMM 30967-1817, a partial shell (shell fragments), and it is a 3D body fossil. Its type locality is head of Rock Creek, Mayfield Ranch, which is in an Irvingtonian terrestrial horizon in the Tule Formation of Texas.
It was considered a nomen vanum by Reynoso and Montellano-Ballesteros (2004); it was recombined as Gopherus hexagonatus by Vlachos (2018) and De La Garza et al. (2018).
It was considered a nomen vanum by Reynoso and Montellano-Ballesteros (2004); it was recombined as Gopherus hexagonatus by Vlachos (2018) and De La Garza et al. (2018).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1893 | Testudo hexagonata Cope |
| 1902 | Testudo hexagonata Hay p. 451 |
| 1908 | Testudo campester Hay |
| 1930 | Testudo campester Hay p. 103 |
| 1930 | Testudo hexagonata Hay p. 103 |
| 1937 | Bysmachelys canyonensis Johnston p. 447 |
| 1966 | Gopherus huecoensis Strain |
| 1982 | Gopherus canyonensis Bramble p. 854 |
| 1982 | Gopherus hexagonata Bramble p. 854 |
| 2004 | Gopherus canyonensis Reynoso and Montellano-Ballesteros p. 824 |
| 2018 | Gopherus hexagonatus De La Garza et al. |
| 2018 | Gopherus hexagonatus 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 hexagonata Cope 1893
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. D. Cope 1893 | The lip of the plastron is not produced and bifurcate, as in T. agassizii
(from S. E. California), but the posterior lobe is quite similar to that of the latter species. The posterior lobe of the T. laticaudata is intermediate in proportions between those of T. hexagonata and T. polyphemus. Both of the extinct species may belong to the genus Xerobates, Ag., but this can not be determined until the crania are discovered. The specimens of this species are smaller than the single one which represents the T. laticaudata. Though allied to the latter, the forms of the lobes of the plastron display too many differences to permit me to regard them as identical. | |
| E. Vlachos 2018 | Gopherus hexagonatus can be diagnosed as a member of Gopherus based on the characters mentioned above. Gopherus hexagonatus differs from other Gopherus to the exclusion of Gopherus donlaloi in its larger size and from Gopherus donlaloi in the presence of hexagonal neurals III–VIII. |
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: Irvingtonian or 1.80000 to 0.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Irvingtonian | USA (Texas) | Testudo hexagonata (type locality: 20498) |