Modderdrift farm: Wordian, South Africa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Anomodontia
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Eodicynodon oosthuizeni
Barry 1974
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Rubidge et al. 1994 | 2 specimens | ||||||||
| NMQR 2991, 3153; all are postcranial remains "found associated with cranial material and we can therefore be confident of the generic identification"; furthermore, the authors explicitly say that the remains represent the species E. oosthuizeni | ||||||||||
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Tapinocephalidae
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Tapinocaninus pamelae
Rubidge 1991
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Rubidge 1991 | |||||||||
| NMQR 2987, NMQR 2985, NMQR 2986, ROZ K95 | ||||||||||
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Therocephalia
- Scylacosauridae
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Ictidosaurus angusticeps
Broom 1903
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1 individual | |||||||||
| NMQR 2910, partial skull, lacking the occiput and posterior skull roof | ||||||||||
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Glanosuchus macrops
Broom 1904
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1 individual | |||||||||
| NMQR 2908, much of the antorbital portion of a skull incl. mandible | ||||||||||
| see common names | ||||||||||
Geography
| Country: | South Africa | State/province: | Western Cape | County: | Prince Albert |
| Coordinates: | 33.1° South, 22.5° East (view map) | ||||
| Paleocoordinates: | 60.3° South, 37.7° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Permian | Epoch: | Guadalupian |
| Stage: | Wordian | 10 m.y. bin: | Permian 4 |
| Key time interval: | Wordian | Zone: | Eodicynodon Assemblage |
| Age range of interval: | 266.90000 - 264.28000 m.y. ago |
Stratigraphy
| Geological group: | Beaufort | Formation: | Abrahamskraal | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "The outcrops on Modderdrift are assigned to the Eodicynodon AZ, which is part of the Abrahamskraal Formation, Beaufort Group, Karoo Supergroup; Middle Permian. [...] Considering the geologic time scale proposed by the International Commission of Stratigraphy (Gradstein and Ogg 2004), we follow Catuneanu et al. (2005) and Rubidge (2005) who assign a Wordian age to this assemblage zone." (Abdala et al., 2008). | |||||
Lithology and environment
| Primary lithology: | nodular calcareous not reported | ||
| Secondary lithology: | siltstone | ||
| Includes fossils? | Y | ||
| Lithology description: "The specimens were discovered in pedogenic calcareous nodular layers within siltstone successions below the first maroon mudrock of the Abrahamskraal Formation. These rocks are considered to have been deposited in a subaerial delta plain depositional environment (Rubidge 1995; Rubidge et al. 2000)." (Abdala et al., 2008). | |||
| Environment: | delta plain | Tectonic setting: | foreland basin |
| Glacial or sequence phase: | regressive | ||
| Geology comments: Rubidge et al. (2000, S. Afr. J. Geol. 103(1)) interpret the basal Abrahamskraal Fm. as non-marine part of a second-order highstand systems tract. | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | mechanical,survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Specimens were briefly described by Rubidge et al. (1983, Nav. Nas. Mus. 4).
NMQR = National Museum, Bloemfontein, South Africa | |
Metadata
| Also known as: | Modderdrift vertebrates | ||
| Database number: | 94649 | ||
| Authorizer: | J. Mueller, J. Falconnet | Enterer: | T. Liebrecht, J. Falconnet |
| Modifier: | J. Falconnet | Research group: | vertebrate |
| Created: | 2010-03-05 07:30:19 | Last modified: | 2023-06-10 14:52:50 |
| Access level: | the public | Released: | 2010-03-05 07:30:19 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 32224. | F. Abdala, B. S. Rubidge, and J. Heever. 2008. The Oldest Therocephalians (Therapsida, Eutheriodonta) and the Early Diversification of Therapsida. Palaeontology 51(4):1011-1024 [J. Mueller/T. Liebrecht] |
Secondary references:
| 65044 | B. S. Rubidge. 1991. A new primitive dinocephalian mammal-like reptile from the Permian of southern Africa. Palaeontology 34:547-559 [G. Lloyd/G. Lloyd] | |
| 32298 | B. S. Rubidge, G. M. King, and J. P. Hancox. 1994. The Postcranial Skeleton of the Earliest Dicynodont Synapsid Eodicynodon from the Upper Permian of South Africa. Palaeontology 37(2):397-408 [J. Mueller/T. Liebrecht] |