List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Amphibia
- Temnospondyli
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| 1 individual | ||||||||||
| vertebral and cranial elements (catalogue number: GSN F311), assumed to come from one and the same individual | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Namibia | State/province: | Erongo |
| Coordinates: | 20.7° South, 14.2° East (view map) | ||
| Paleocoordinates: | 48.5° South, 26.3° West (Wright 2013) | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Stratigraphy
| Geological group: | "Ecca" | Formation: | Gai-As | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "Within the uppermost Gai-As Formation, close to its transitional contact with the Doros Formation, [...] 14 m below a conspicuous fallout tuff horizon which provides our age control [...] " (Warren et al., 2001).
Note: In the stratigraphic column in fig. 3 of Warren et al. (2001) a siltstone bed in the middle part of the Gai-As Fm. is labelled with "Stereospondylous amphibian" which is contradictory to the statement in the above cited text. "Recent U/Pb SHRIMP dating of zircons from two of several fallout tuff beds in the Gai-As Formation 14 m above the stereospondyl find gave weighted mean values of 272+/-1.8 Ma and 265+/-2.5 Ma (Wanke, in prep.), both equivalent to late Early Permian (cf. Ross et al., 1994; Haq and Eysinga, 1998)." (Warren et al., 2001). According to the time scales of Gradstein et al. (2004) and Ogg et al. (2008) the ages obtained from the ash beds correspond to an interval spanning the Kungurian to the lowest Capitanian. Given that the finding horizon is considerably below the dated ash bed, the collection is assigned to the Kungurian and Roadian (TL). | |||||
Lithology and environment
| Primary lithology: | tabular,brown,red silty mudstone |
| Includes fossils? | Y |
| Lithology description: The Gai-As Fm. is said to generally consist of "plane bedded, pink and maroon mudrocks" (Warren et al., 2001). | |
| Environment: | lacustrine indet. |
| Geology comments: "After Whitehill deposition the Huab Basin became more restricted with the rejuvenation of northerly trending marginal rift faults, resulting in the more closely confined lacustrine-mud deposition of the the Gai-As Formation." (Warren et al., 2001). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Articulated whole bodies: | none |
| Associated major elements: | some |
| Disassociated major elements: | some |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: fossils are reposited in the collections of the Geological Survey of Namibia (GSN) | |
Metadata
| Also known as: | Damaraland, Karroo, Karoo | ||
| Database number: | 90437 | ||
| Authorizer: | J. Mueller | Enterer: | T. Liebrecht |
| Modifier: | T. Liebrecht | Research group: | vertebrate |
| Created: | 2009-07-21 07:46:00 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-07-21 07:46:00 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 30395. | A. A. Warren, B. S. Rubidge, I. G. Stanistreet, H. Stollhofen, A. Wanke, E. M. Latimer, C. A. Marsicano and R. J. Damiani. 2001. Oldest Known Stereospondylous Amphibian from the Early Permian of Namibia. Journal of Vertebrate Paleontology 21(1):34-39 [J. Mueller/T. Liebrecht] |