Njalila, Loc. B11: Anisian, Tanzania
collected by Haughton, Parrington
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trirachodontidae
|
||||||||||
Cricodon metabolus n. gen., n. sp.
Crompton 1955
|
Crompton 1955 | 6 specimens | ||||||||
UMZC, partial skull and postcranium (holotype). BSPG, five isolated teeth | ||||||||||
Reptilia
|
||||||||||
Stenaulorhynchus stockleyi n. gen., n. sp.
Haughton 1932
|
||||||||||
Humerus (holotype), femoral fragments, vertebrae | ||||||||||
1 specimen | ||||||||||
= Archosauriformes indet.
Gauthier 1986
|
Butler 2010 | |||||||||
Boonstra 1953 | 1 specimen | |||||||||
SAM 11754 (holotype), right humerus | ||||||||||
see common names |
Geography
Country: | Tanzania | State/province: | Iringa |
Coordinates: | 10.4° South, 35.3° East (view map) | ||
Paleocoordinates: | 40.5° South, 20.5° East (Wright 2013) | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Triassic | Epoch: | Middle Triassic |
Stage: | Anisian | 10 m.y. bin: | Triassic 2 |
Key time interval: | Anisian | Other zone: | Cynognathus subzone C |
Age range of interval: | 246.7 - 241.464 m.y. ago |
Stratigraphy
Formation: | Manda Beds | Member: | Lifua | ||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: "Upper Bone Bed (K.8)", now the Lifua Member of the Manda Beds.
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: | red sandstone |
Secondary lithology: | micaceous,green,red siltstone |
Lithology description: "fining upward cycles of reddish feldspathic sandstones grading up to green or red micaceous siltstones" | |
Environment: | fluvial-deltaic indet. |
Geology comments: "seasonally arid fluviodeltaic environment" |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | medium |
Abundance in sediment: | rare |
Fragmentation: | occasional |
Collection methods and comments
Collection excludes: | all macrofossils |
Collection methods: | selective quarrying,mechanical,field collection |
Reason for describing collection: | taxonomic analysis |
Collectors: | Haughton, Parrington |
Collection method comments: UMZC: University Museum of Zoology, Cambridge, UK
SAM: Iziko South African Museum, Cape Town |
Metadata
Database number: | 55756 | ||
Authorizer: | M. Carrano, A. Dunhill, R. Butler | Enterer: | K. Maguire, B. Allen, R. Butler |
Modifier: | R. Butler | Research group: | vertebrate |
Created: | 2005-11-04 10:09:49 | Last modified: | 2025-02-22 15:12:02 |
Access level: | the public | Released: | 2005-11-04 10:09:49 |
Creative Commons license: | CC0 |
Reference information
Primary reference:
6969. | S. H. Haughton. 1932. On a collection of Karroo vertebrates from Tanganyika Territory. Quarterly Journal of the Geological Society of London 88(4):634-671 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
59882 | L. D. Boonstra. 1953. A report on a collection of fossil reptilian bones from Tanganyika Territory. Annals of the South African Museum 42:5-18 [R. Butler/J. Benito Moreno] | |
32144 | R. J. Butler. 2010. Taxonomic opinions on Archosauromorpha. [R. Butler/R. Butler/R. Butler] | |
35221 | A. W. Crompton. 1955. On some Triassic cynodonts from Tanganyika. Proceedings of the Zoological Society of London 125:617-669 [R. Butler/R. Butler] |