Nsungwe 2 (Oligocene of Tanzania)

Also known as Nsungwe Formation, Rukwa Basin

Where: Mbeya, Tanzania (8.9° S, 33.2° E: paleocoordinates 11.3° S, 29.9° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Songwe Member (Nsungwe Formation), Late/Upper Oligocene (28.4 - 23.0 Ma)

• The Nsungwe Formation belongs to the younger part of the infill of the Rukwe Rift Basin (Red Sandstone Group). It "is subdivided into the lower Utengule Member and upper Songwe Member, with the snake-bearing Songwe Member assigned a Late Oligocene (24.95 MY) age based on biostratigraphy, dated ash beds, and detrital zircon geochronology" (McCartney et al. 2014).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; red siliciclastic sediments

• "fluvial facies"
• "red beds"

Size classes: macrofossils, mesofossils

Collection methods: mechanical,

• Snake material was mechanically prepared at the Ohio University Fossil Preparation and Imaging Facility.

•RRBP = Rukwa Rift Basin Project of the Tanzanian Antiquities Unit

Primary reference: J. A. McCartney, N. J. Stevens, and P. M. O’Connor. 2014. The Earliest Colubroid-Dominated Snake Fauna from Africa: Perspectives from the Late Oligocene Nsungwe Formation of Southwestern Tanzania. PLoS ONE 9(3):e90415 [J. Mueller/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 167432: authorized by Johannes Mueller, entered by Torsten Liebrecht on 17.03.2015, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata -
Colubroidea "morphotype B" Oppel 1811 snake
number of specimens not specified in the reference but probably more than one
Colubroidea indet. Oppel 1811 snake
RRBP 07657 (fragmentary vertebra of possibly juvenile individual, from "Big Wall"); RRBP 09284 (caudal vertebra, "distinct from Colubroid Morphotype C in having hemapophyses")
Booidea "morphotype B" Gray 1825 snake
RRBP 11490 (posterior trunk vertebra)
 Squamata - Boidae
Rukwanyoka holmani n. gen. n. sp.
Rukwanyoka holmani n. gen. n. sp. McCartney et al. 2014 boa
RRBP 10041 (holotype, mid-trunk vertebra); RRBP 11543B (referred specimen, mid- or posterior trunk vertebra)
Mammalia
 Creodonta -
Pakakali rukwaensis n. gen. n. sp.2
Pakakali rukwaensis n. gen. n. sp.2 Borths and Stevens 2017 creodont
RRBP 09088 - holotype
Amphibia
 Salientia - Ptychadenidae
Ptychadenidae indet.1 Dubois 1987 frog
RRBP 07165