M 68 (Eocene of the United States)

Where: Bienville County, Louisiana (32.4° N, 93.0° W: paleocoordinates 33.4° N, 84.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cook Mountain Formation (Claiborne Group), Bartonian (41.3 - 38.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: mesofossils

Primary reference: K. V. Palmer and D. C. Brann. 1965. Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Peteropoda, Scaphopoda and Cephalopoda. Bulletins of American Paleontology 48:1-471 [M. Kosnik/M. Kosnik/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92272: authorized by Jocelyn Sessa, entered by Laurie Eccles on 04.11.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
Glycymeris trigonella Conrad 1833 clam
Glycymeris trigonella minor
 Arcida - Arcidae
 Pectinida - Pectinoidae
 Pectinida - Anomiidae
Anomia lisbonensis Aldrich 1886 jingle
 Cardiida - Cardiidae
 Cardiida - Mactridae
Spisula parilis2 Conrad 1833 clam
 Cardiida - Anatinellidae
Pteropsella lapidosa Conrad 1846 clam
 Nuculanida - Nuculanidae
Yoldia (Calorhadia) bella pointed nut clam
Gastropoda
 Neogastropoda - Turridae
? Pleurofusia huppertzi turrid
? Pleurofusia huppertzi hammettensis
Infracoronia ludoviciana Harris and Palmer 1947 turrid
 Neotaenioglossa - Calyptraeidae
Crepidula lirata1 Conrad 1833 slipper shell