Where: Oklahoma (36.3° N, 95.8° W: paleocoordinates 5.0° S, 30.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lost Branch Formation, Kasimovian (307.0 - 303.7 Ma)

• The basal part of the formation represents black concretionary shale (1.5–2.4 m thick; = the Nuyaka Creek black shale bed in Bennison, 1981), from which a diverse and well preserved cephalopod fauna occurs. Latest Desmoinesian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, black, carbonaceous shale

Size class: macrofossils

Collected by R.H. Mapes; reposited in the AMNH

Primary reference: S. Niko and R. H. Mapes. 2016. Late Carboniferous coiled nautiloids from the Lost Branch Formation of Oklahoma, midcontinent North America. Paleontological Research 20:73-79 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 177750: authorized by Matthew Clapham, entered by Matthew Clapham on 09.04.2016

Creative Commons license: CC BY (attribution)