Also known as Kaswanga; Rusinga Island

Where: Nyanza, Kenya (0.4° S, 34.3° E: paleocoordinates 1.6° S, 32.2° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Fossil Bed Member (Hiwegi Formation), Burdigalian (20.4 - 16.0 Ma)

• "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).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithology not reported

Size class: macrofossils

Collected by L. Leakey, J. van Couvering in 1948, 1967; reposited in the BMNH

• BMNH and Kenya National Museum collections

Primary reference: E. Tchernov and J. Van Couvering. 1978. New crocodiles from the Early Miocene of Kenya. Palaeontology 21(4):857-867 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92702: authorized by John Alroy, entered by John Alroy on 24.11.2009

Creative Commons license: CC BY (attribution)