Where: Arkansas (35.8° N, 92.6° W: paleocoordinates 10.9° S, 32.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Imo Formation, Arnsbergian (327.0 - 323.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

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

Primary reference: S. Niko and R. H. Mapes. 2017. Tainoceratid and liroceratid nautilids from the upper Mississippian Imo Formation of Arkansas, midcontinent North America. Paleontological Research 21:178-182 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185022: authorized by Matthew Clapham, entered by Matthew Clapham on 05.04.2017

Creative Commons license: CC BY (attribution)