List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Traversodontidae
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Trirachodon sp.
Seeley 1895
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1 specimen | |||||||||
| GSM OM-5, skull plus lower jaw | ||||||||||
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= Traversodontidae indet.
Huene 1936
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Abdala and Smith 2009 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Namibia |
| Coordinates: | 21.1° South, 16.4° East (view map) |
| Paleocoordinates: | 54.0° South, 9.9° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | small collection |
Stratigraphy
| Geological group: | Karoo | Formation: | Omingonde | Member: | Upper |
| Local section: | Etjo Mountain | Local bed: | 483 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "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)
Locality OM-5 is stratigraphically very high in the upper Omingonde Formation (see Abdala & Smith 2009: fig. 11). 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. This locality would therefore be late Anisian or early Ladinian in age | |||||
Lithology and environment
| Primary lithology: | massive,red siltstone | ||
| Includes fossils? | Y | ||
| Environment: | dry floodplain | Tectonic setting: | rift |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Fragmentation: | occasional |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Smith, Swart |
| Collection method comments: GSN: Geological Survey of Namibia, Windhoek | |
Metadata
| Database number: | 99540 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler | Research group: | vertebrate |
| Created: | 2010-11-15 17:45:51 | Last modified: | 2010-11-15 00:45:51 |
| Access level: | the public | Released: | 2010-11-15 17:45:51 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 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] |
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] |