Where: Zambia (16.7° S, 27.9° E: paleocoordinates 55.9° S, 1.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Madumabisa Formation, Capitanian to Capitanian (264.3 - 252.2 Ma)

• Bond (1954) thought that the beds could be correlated with similar beds in Zimbabwe assigned to the Tapinocephalus zone. Barbolini et al. (2016) gave a Lopingian age to the Madumabisa Formation on the basis of palynomorphs, with the underlying Gwembe coal dated as Wordian-Capitanian. Olroyd et al. (2018) correlated the lower Madumabisa Formation to Tapinocephalus zone or possibly the Eodicynodon zone on the basis of vertebrates shared with deposits in Tanzania. The stratigraphic position of the bivalve fauna within the Madumabisa Shales is unknown, and it seems that the unit spans a long time range.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified, argillaceous limestone

Size class: macrofossils

Preservation: mold/impression

Collected by H.S. Gair

• Repository: Geological Department, National Museum of Southern Rhodesia

Primary reference: G. Bond. 1954. Lamellibranchia and plants from the Lower Karroo Beds of Northern Rhodesia. Geological Magazine 91:189-192 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 208781: authorized by Matthew Clapham, entered by Matthew Clapham on 10.04.2020

Creative Commons license: CC BY (attribution)