Njalila, Loc. B11: Anisian, Tanzania
collected by Haughton, Parrington

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trirachodontidae
Crompton 1955 6 specimens
UMZC, partial skull and postcranium (holotype). BSPG, five isolated teeth
Reptilia
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]