Shackleton Gully: Burdigalian, Kenya
collected by L. Leakey, J. van Couvering 1948, 1967
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Crocodylus pigotti n. sp.
Tchernov and Van Couvering 1978
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| NHMUK PV R7729 - type (almost complete skull, without lower jaw); numerous referred material - KNM-RU specimens | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Kenya | State/province: | Nyanza |
| Coordinates: | 0.4° South, 34.3° East (view map) | ||
| Paleocoordinates: | 1.6° South, 32.2° East | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Burdigalian | ||
| Age range of interval: | 20.44 - 15.98 m.y. ago |
Stratigraphy
| Formation: | Hiwegi | Member: | Fossil Bed | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "Below Marker Bed I, Fossil Bed Member, Hiwegi Formation... Early Miocene, about 17 M.y. (Van Couvering and Miller 1969)"
K-Ar dates published by Drake et al. (1988) suggested that the Hiwegi For- mation was deposited ~17.9 Ma, and that the entire fossiliferous Rusinga Group sequence (Fig- ure 1) was deposited in less than a half million years. More recent analyses using 40Ar/39Ar dates, magnetostratigraphy, and lithostratgiraphy demon- strate that the fossiliferous strata on Rusinga were deposited over a much longer time interval, between ~17-20 Ma (Peppe et al., 2009; Peppe et al., 2011; McCollum et al., 2012; Peppe et al. 2016; Peppe et al. 2017). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | fluvial-lacustrine indet. |
| Geology comments: "lake floor and riverine flood basin deposits" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection,survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | BMNH | ||
| Collectors: | L. Leakey, J. van Couvering | Collection dates: | 1948, 1967 |
| Collection method comments: BMNH and Kenya National Museum collections | |||
| Taxonomic list comments:additional material from unspecified other localities represents C. pigotti | |||
Metadata
| Also known as: | Kaswanga; Rusinga Island | ||
| Database number: | 92702 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2009-11-24 19:59:51 | Last modified: | 2022-03-28 06:28:49 |
| Access level: | the public | Released: | 2009-11-24 19:59:51 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 31242. | E. Tchernov and J. Van Couvering. 1978. New crocodiles from the Early Miocene of Kenya. Palaeontology 21(4):857-867 [J. Alroy/J. Alroy] |
Secondary references:
| 46724 | J. L. Conrad, K. Jenkins, T. Lehmann, F. K. Manthi, D. J. Peppe, S. Nightingale, A. Cossette, H. M. Dunsworth, W. E. H. Harcourt-Smith and K. P. Mcnulty. 2013. New specimens of ‘Crocodylus’ pigotti (Crocodylidae) from Rusinga Island, Kenya, and generic reallocation of the species. Journal of Vertebrate Paleontology 33(3):629-646 [P. Mannion/P. Mannion] |