| Eodicynodon Assemblage Zone | |
|---|---|
| Stratigraphic range: Middle Permian | |
 Eodicynodon oosthuizeni | |
| Type | Biozone |
| Unit of | Abrahamskraal Formation of the Beaufort Group |
| Underlies | Tapinocephalus Assemblage Zone |
| Overlies | Ecca Group |
| Thickness | up to 2,034.12 feet (620 m) |
| Location | |
| Region | Northern & Western Cape |
| Country |  South Africa |
| Extent | Karoo Basin |
| Type section | |
| Named for | Eodicynodon |
| Named by | Harry Govier Seeley (1892) Robert Broom (1906, 1909) |
The Eodicynodon Assemblage Zone is a tetrapod assemblage zone or biozone which correlates to the Abrahamskraal Formation, Adelaide Subgroup of the Beaufort Group, a fossiliferous and geologically important geological Group of the Karoo Supergroup in South Africa.[1] The thickest outcrops, reaching approximately 620 metres (2,030 ft), occur south-east of Sutherland, north of Prince Albert, and south-east of Beaufort West. The Eodicynodon Assemblage Zone is the lowermost biozone of the Beaufort Group.[2][3][4]
The name of the biozone refers to Eodicynodon oosthuizeni, a small to medium-sized herbivorous dicynodont therapsid. It is characterized by the presence of this dicynodont genus along with the Nyaphulia, and the dinocephalian Tapinocaninus pamelae.[5][6]
- ^ Rubidge, B. S. (ed.) 1995b. Biostratigraphy of the Beaufort Group (Karoo Supergroup). South African Committee of Stratigraphy. Biostratigraphic Series 1. Pretoria, Council for Geoscience
- ^ S, Rubidge, Bruce (1990). "A new vertebrate biozone at the base of the Beaufort Group, Karoo sequence (South Africa)". Palaeontologia Africana. ISSN 0078-8554.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Cole, D.I.; Johnson, M.R.; Day, M.O. (June 2016). "Lithostratigraphy of the Abrahamskraal Formation (Karoo Supergroup), South Africa". South African Journal of Geology. 119 (2): 415–424. doi:10.2113/gssajg.119.2.415. ISSN 1012-0750.
- ^ Jirah, Sifelani; Rubidge, Bruce S. (2014-12-01). "Refined stratigraphy of the Middle Permian Abrahamskraal Formation (Beaufort Group) in the southern Karoo Basin". Journal of African Earth Sciences. 100: 121–135. doi:10.1016/j.jafrearsci.2014.06.014. ISSN 1464-343X.
- ^ Rubidge, B.S.; King, G.M.; Hancox, P.J. (1994). "The posteranial skeleton of the earliest dicynodont synapsid Eodicynodon from the Upper Permian of South Africa". Palaeontology. 37 (2): 397–408.
- ^ Rubidge, B.S.; Modesto, S.; Sidor, C.; Welman, J. (1999). "Eunotosaurus africanus from the Ecca-Beaufort contact in Northern Cape Province, South Africa-implications for Karoo basin development". South African Journal of Science. 95 (11/12): 553–554.