U9/1, drainage of the Hita River: Anisian, Tanzania
collected by BMNH - University of London joint palaeontological expedition 1963
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Anomodontia
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Dicynodontia indet.
(Owen 1859)
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| Uncatalogued BMNH specimens | ||||||||||
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Reptilia
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Asperoris mnyama n. gen., n. sp.
Nesbitt et al. 2013
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1 individual | |||||||||
| NHMUK PV R36615, well-preserved incomplete skull including much of the right maxilla, nearly complete right premaxilla, much of the right nasal, ventral process of the postorbital, right prefrontal, right frontal, right parietal, much of a right postfrontal, other unidentified skull fragments | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Tanzania | State/province: | Ruvuma | County: | Songea |
| Coordinates: | 10.4° South, 35.2° East (view map) | ||||
| Paleocoordinates: | 53.8° South, 23.0° East | ||||
| Basis of coordinate: | estimated from map | ||||
| Altitude: | 750 meters | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Middle Triassic |
| Stage: | Anisian | 10 m.y. bin: | Triassic 2 |
| Key time interval: | Anisian | Other zone: | Cynognathus Assemblage Zone Subzone C |
| Age range of interval: | 247.20000 - 242.00000 m.y. ago |
Stratigraphy
| Formation: | Manda Beds | Member: | Lifua | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Lifua Member of the Manda beds is "correlated with Subzone C of the Cynognathus Assemblage Zone. This correlation was based on the shared occurrences of the dicynodont Angonisaurus and the cynodonts Diademodon and Cricodon. Subzone C of the Cynognathus Assemblage Zone is suggested to be late Anisian. The Rio Mendoza Formation of Argentina correlates with Subzone C of the Cynognathus Assemblage Zone(Rubidge 2005), and thus the Lifua Member of the Manda Beds. The top of the Rio Mendoza Formation has been dated at 243 ± 5 Ma (Avila et al. 2006), which is consistent with the Anisian age as predicted by biostratigraphy." (Nesbitt et al. 2010: Nature 464:95-98) | |||||
Lithology and environment
| Primary lithology: | coarse calcareous sandstone |
| Includes fossils? | Y |
| Environment: | fluvial indet. |
| Geology comments: "other localities in the immediate area are characterized by fluvial sediments" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Fragmentation: | occasional |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | BMNH | ||
| Collectors: | BMNH - University of London joint palaeontological expedition | Collection dates: | August 23rd 1963 |
Metadata
| Database number: | 144368 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2013-05-05 18:35:57 | Last modified: | 2016-01-11 10:37:20 |
| Access level: | the public | Released: | 2013-05-05 18:35:57 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 46672. | S. J. Nesbitt, R. J. Butler, and D. J. Gower. 2013. A new archosauriform (Reptilia: Diapsida) from the Manda beds (Middle Triassic) of southwestern Tanzania. PLoS ONE 8:e72753 [R. Butler/R. Butler/R. Butler] |