Where: Arkansas (35.8° N, 92.6° W)
• Paleocoordinates: 18.3° S, 39.1° W (Wright 2013)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Imo Formation, Arnsbergian (326.9 - 323.6 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: CC0 (CC0)
Taxonomic list
Cephalopoda | |
Tylonautilus gratiosus Girty 1909 | |
Peripetoceras kummeli Niko and Mapes 2017
? Condraoceras sp. Miller et al. 1947
Bistrialites bicostatus Gordon 1964 |