Also known as Songwe, Nsungwe Formation, Rukwa Basin
Where: Tanzania (8.9° S, 33.2° E: paleocoordinates 11.3° S, 29.9° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Songwe Member (Nsungwe Formation), Late/Upper Oligocene (28.4 - 23.0 Ma)
• "late Oligocene Songwe Member of the Nsungwe Formation of the Red Sandstone Group" in "a 3-4 meter thick sequence... An ash-flow tuff bed... 1.5 meters above the fossil bearing interval at TZ-01 has been dated at ~24.95 Ma" using U-Pb on detrital zircon (Stevens et al. 2009)
•most specimens are from a "2 m thick sandstone bed" (Stevens et al. 2006)
• group of beds-level stratigraphic resolution
Environment/lithology: crevasse splay; massive, medium-grained, coarse, muddy sandstone
Size classes: macrofossils, mesofossils
• material consists of "small (< 4 cm) cranial and dental remains, including numerous jaws, teeth, and limb elements" (Stevens et al. 2009)
Collection methods: National Museum of Tanzania collection
Primary reference: N. J. Stevens, P. M. O'Connor, and E. M. Roberts. 2009. A hyracoid from the late Oligocene Red Sandstone Group of Tanzania, Rukwalorax jinokitana. Journal of Vertebrate Paleontology 29(3):972-975 [J. Alroy/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 99405: authorized by John Alroy, entered by John Alroy on 10.11.2010, edited by Torsten Liebrecht and Terri Cleary
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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Rukwalorax jinokitana n. gen. n. sp.
Rukwalorax jinokitana n. gen. n. sp. Stevens et al. 2009 hyrax | |
Reptilia | |
Alethinophidia indet.1, Booidea "morphotype C"1, Booidea indet.1, Colubroidea "morphotype A"1, Colubroidea "morphotype B"1, Colubroidea "morphotype C"1, Colubroidea indet.1
Colubroidea "morphotype B"1 Oppel 1811 snake number of specimens not specified in the reference but probably more than one
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Gekkota indet.2 Cuvier 1817 squamates RRBP 13002, right maxilla with fragmentary portions of prefrontal and ?nasal/frontal
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