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Eucnemesaurus fortis
Taxonomy
Eucnemesaurus fortis was named by Van Hoepen (1920). Its type specimen is TrM 119, a partial skeleton, and it is a 3D body fossil. Its type locality is farm Zonderhout (291), Slabberts (zone A/5), which is in a Norian/Rhaetian terrestrial mudstone in the Elliot Formation of South Africa. It is the type species of Eucnemesaurus.
It was considered a nomen dubium by Galton and Upchurch (2004).
It was considered a nomen dubium by Galton and Upchurch (2004).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1920 | Eucnemesaurus fortis Van Hoepen p. 93 |
| 1924 | Eucnemesaurus fortis Haughton |
| 1939 | Eucnemesaurus fortis Kuhn p. 67 |
| 1940 | Eucnemesaurus fortis Huene p. 262 |
| 1941 | Eucnemesaurus fortis Huene p. 141 |
| 1954 | Eucnemesaurus fortis Haughton and Brink p. 37 |
| 1967 | Eucnemesaurus fortis Charig p. 712 |
| 1970 | Eucnemesaurus fortis Ellenberger p. 346 |
| 1970 | Eucnemesaurus fortis Steel p. 57 |
| 1985 | Aliwalia rex Galton |
| 1988 | Aliwalia rex Paul p. 250 |
| 1990 | Aliwalia rex Sues p. 147 |
| 1998 | Aliwalia rex Galton and Van Heerden pp. 172-174 |
| 2004 | Aliwalia rex Knoll p. 76 |
| 2004 | Aliwalia rex Langer p. 27 |
| 2005 | Eucnemesaurus fortis Yates pp. 274-275 |
| 2007 | Eucnemesaurus fortis Yates p. 96 |
| 2009 | Eucnemesaurus fortis Barrett p. 1032 |
| 2010 | Eucnemesaurus fortis Langer et al. p. 70 |
| 2015 | Eucnemesaurus fortis McPhee et al. p. 4 |
| 2016 | Eucnemesaurus fortis Peyre de Fabrègues and Allain p. 18 |
| 2020 | Eucnemesaurus fortis Peyre de Fabrègues and Allain p. 26 |
| 2023 | Eucnemesaurus fortis Sciscio et al. p. 3 |
| 2024 | Eucnemesaurus fortis Barrett and Choiniere p. 2 |
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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.
†Eucnemesaurus fortis Van Hoepen 1920
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Invalid names: Aliwalia rex Galton 1985 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. M. Yates 2007 | A sauropodomorph with: a small accessory lamina branching off of the paradiapophyseal lamina and dividing the middle chonos in the middle dorsal vertebrae; an abrupt proximal end of the lesser trochanter; a fourth trochanter with a curved and oblique long axis. | |
| B. W. McPhee et al. 2015 | E. entaxonis differs from E. fortis in the following features: (1) E. fortis presents a femur that is subcircular in cross-section rather than elliptical, and (2) the holotype of E. fortis (TM 119) displays a distal tibia in which the mediolaterally extensive posterior surface extends as far laterally as the anterior ascending process (for articulation with the astragalus). It is possible that the distal embayment present on the fourth trochanter in E. fortis is absent in E. entaxonis, but poor preservation in the latter taxon precludes confirmation of this. Furthermore, a dorsal neural arch of E. fortis possesses a unique accessory lamina within the centrodiapophyseal fossa—a feature that cannot be confirmed in the preserved material of E. entaxonis. This feature therefore remains a valid diagnostic character of E. fortis for the time being. |
Measurements
No measurements are available
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| Source: g = genus, subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Peczkis 1995, Hendy et al. 2009 | |||||
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Norian - Rhaetian | South Africa (Eastern Cape) | Aliwalia rex (36610) | |
| Norian - Rhaetian | South Africa (Free State) | Eucnemesaurus fortis (type locality: 36733 107176) |