Beaufort West Commonage (Tropidostoma & Cistecephalus Assemblage Zone) (Permian to of South Africa)

Where: Western Cape, South Africa (32.4° S, 22.6° E: paleocoordinates 60.0° S, 32.6° W)

• coordinate based on nearby landmark

When: Poortjie Member, Capitanian to Capitanian (265.1 - 254.2 Ma)

• Beaufort West Commonage was listed as Cistecephalus Assemblage Zone in Kitching, 1977 (and was referred previously as Endothiodon Assemblage Zone) before the definition of the Tropidostoma Assemblage Zone (see Rubidge & Keyser, 1995). Posterior works, as Kammerer et al., 2011, identify fossils from this locality as pertaining to the both the Tropidostoma and the Cistecephalus Assemblage Zones.

•Direct dates for the Tropidostoma and Cistecephalus Assemblage Zones from Rubidge et al., 2013

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by John Almond, Madelon Tusenius

Primary reference: J. W. Kitching. 1977. The distribution of the Karroo vertebrate fauna. Memoirs of the Bernard Price Institute for Palaeontological Research 1:1-131 [H. Sims/J. Camp]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 176922: authorized by Richard Butler, entered by Juan Benito Moreno on 08.03.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Gorgodontia - Gorgonopidae
"Aelurosaurus whaitsi n. sp." = Aelurosaurus whaitsi4, "Aelurosaurus breviceps n. sp." = Aelurosaurus whaitsi4, "Scymnognathus whaitsi n. gen. n. sp." = Gorgonops whaitsi4, Gorgonops torvus4
"Aelurosaurus whaitsi n. sp." = Aelurosaurus whaitsi4 Broom 1911 reptile
AMNH 5528, fragment of snout
"Aelurosaurus breviceps n. sp." = Aelurosaurus whaitsi4 Broom 1911 reptile
AMNH 5514, snout and dentary
"Scymnognathus whaitsi n. gen. n. sp." = Gorgonops whaitsi4 Broom 1912 reptile
AMNH 5530a, incomplete and very crushed skull. BMNH R 4053, fragmentary skull. BMNH R 4052, flattened snout
Gorgonops torvus4 Owen 1876 reptile
AMNH 5515, well preserved but flattened skull (type). AMNH 5531, 5544, 5546, 5568
Osteichthyes
 Therapsida -
"Endothiodon uniseries" = Endothiodon bathystoma, "Endothiodon whaitsi" = Endothiodon bathystoma
"Endothiodon uniseries" = Endothiodon bathystoma Owen dicynodont
"Endothiodon whaitsi" = Endothiodon bathystoma Owen dicynodont
 Therapsida - Pylaecephalidae
"Dicynodon feliceps" = Diictodon feliceps, "Dicynodon sollasi" = Diictodon feliceps, "Dicynodon ictidops n. sp." = Diictodon feliceps2, "Dicynodon psittacops n. sp." = Diictodon feliceps1
"Dicynodon feliceps" = Diictodon feliceps Owen 1876 dicynodont
"Dicynodon sollasi" = Diictodon feliceps Owen 1876 dicynodont
"Dicynodon ictidops n. sp." = Diictodon feliceps2 Owen 1876 dicynodont
AMNH FARB 5510, a poorly prepared, laterally crushed, complete skull
"Dicynodon psittacops n. sp." = Diictodon feliceps1 Owen 1876 dicynodont
AMNH FARB 5534, a dorsoventrally crushed skull, lower jaws and most of the postcranium
 Therapsida - Cryptodontidae
"Dicynodon latirostris n. sp." = Oudenodon bainii3
"Dicynodon latirostris n. sp." = Oudenodon bainii3 Owen 1860 therapsid
SAM-PK-5141, a poorly preserved, dorsoventrally crushed skull and lower jaws
 Therocephalia -
Alopecorhinus parvidens Broom 1912 therapsid
Scylacoides ferox Broom 1915 therapsid
Ictidognathus hemburyi n. sp. Broom 1912 therapsid