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western Etjo Mtn, above lower arenaceous layer (Triassic to of Namibia)

Where: Namibia (21.1° S, 16.4° E: paleocoordinates 54.0° S, 9.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Cynognathus subzone B or C other zone, Omingonde Formation (Karoo Group), Anisian to Anisian (247.2 - 235.0 Ma)

• Referred to as the "Lower Etjo Beds" by Keyser (1973) but now called the Omingonde Formation. "Based on the co-occurrence of Kannemeyeria and Erythrosuchus in subzone B of the Cynognathus Assemblage Zone, the Omingonde Formation may be broadly assigned an Anisian age." (Damiani et al. 2007. Palaeontology 50: 1531-1546)

•Abdala & Smith (2009) suggest the possibility of two different faunas in the upper Omingonde Formation; an older one corresponding to Cynognathus Subzone B and the upper possibly to Cynognathus Subzone C. On the basis of the presence of Chiniquodon in the upper fauna, Abdala & Smith (2009) tentatively suggested that the Omingonde could extend into the early Ladinian. However, it is not clear what level in the formation this Trirachodon collection came from and so a general Anisian-early Ladinian age is assigned

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; nodular shale

Size class: macrofossils

Collection methods: Specimens in the collections of the Geological Survey of South Africa, Pretoria

Primary reference: A. W. Keyser. 1973. A new Triassic vertebrate fauna from South West Africa. Palaeontologia africana 16:1-15 [R. Butler/R. Butler] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 99460: authorized by Richard Butler, entered by Richard Butler on 11.11.2010

Creative Commons license: CC BY (attribution)