N slopes, Etjo Mtn, btwn lower + middle arenaceous layers: Anisian, Namibia
collected by Keyser

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anomodontia
1 specimen
R313, skull
Renaut et al. 2003
1 specimen
R320, skull
see common names

Geography
Country:Namibia
Coordinates: 21.1° South, 16.5° East (view map)
Paleocoordinates:37.5° South, 6.3° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Triassic Epoch: Middle Triassic
Stage: Anisian 10 m.y. bin: Triassic 2
Key time interval: Anisian Other zone:  Cynognathus subzone B
Age range of interval: 246.7 - 241.464 m.y. ago
Stratigraphy
Geological group:Karoo Formation:Omingonde
Stratigraphic resolution:group of beds
Stratigraphy comments: 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. Dolichuranus was suggested by Abdala & Smith (2009) to come from the older fauna, and would therefore be early Anisian in age.
Lithology and environment
Primary lithology:nodular "shale"
Includes fossils?Y
Environment:terrestrial indet. Tectonic setting:rift
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Temporal resolution:snapshot
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collectors:Keyser
Collection method comments: Specimens in the collections of the Geological Survey of South Africa, Pretoria
Metadata
Database number:99453
Authorizer:R. Butler Enterer:R. Butler
Modifier:R. Butler Research group:vertebrate
Created:2010-11-11 23:24:00 Last modified:2025-02-22 15:12:02
Access level:the public Released:2010-11-11 23:24:00
Creative Commons license:CC0
Reference information

Primary reference:
34203. A. W. Keyser. 1973. A new Triassic vertebrate fauna from South West Africa. Palaeontologia africana 16:1-15 [R. Butler/R. Butler]

Secondary references:

34212 F. Abdala and R. M. H. Smith. 2009. A Middle Triassic cynodont fauna from Namibia and its implications for the biogeography of Gondwana. Journal of Vertebrate Paleontology 29:837-851 [R. Butler/R. Butler]
62280 A. J. Renaut, R. J. Damiani, A. M. Yates and P. J. Hancox. 2003. A taxonomic note concerning a dicynodont (Synapsida: Anomodontia) from the Middle Triassic of East Africa. Palaeontologia africana 39:93-94 [R. Butler/R. Butler]
34213 R. M. H. Smith and R. Swart. 2002. Changing fluvial environments and vertebrate taphonomy in response to climatic drying in a mid-Triassic rift valley fill: the Omingonde Formation (Karoo Supergroup) of central Namibia. Palaios 17:249-267 [R. Butler/R. Butler]