MGS 22 (Eocene of the United States)

Where: Clarke County, Mississippi (32.2° N, 88.8° W: paleocoordinates 33.4° N, 77.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Winona Formation (Claiborne Group), Lutetian (47.8 - 41.3 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; sandstone

Size class: mesofossils

Primary reference: D. T. Dockery. 1980. Invertebrate Macropaleontolgy of the Clarke County Mississippi Area. Bulletin - Mississippi Geological, Economic and Topographic Survey 122 [M. Kosnik/M. Kosnik/L. Eccles]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 99668: authorized by Jocelyn Sessa, entered by Laurie Eccles on 18.11.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Callianassidae
Callianassa sp. Leach 1814 decapod
Bivalvia
 Pectinida - Pectinoidae
Chlamys clarkeana Aldrich 1895 scallop
 Ostreida - Ostreidae
Cubitostrea perplicata Dall 1898 oyster
Cubitostrea lisbonensis Harris 1919 oyster
 Carditida - Crassatellidae
Crassatella sp. Lamarck 1799 clam
 Cardiida - Cardiidae
Nemocardium sp. Meek 1876 cockle
Gastropoda
 Neogastropoda - Buccinidae
Lacinia alveata Conrad 1833 true whelk
 Neogastropoda - Volutidae
Athleta "sp. A" Conrad 1853 volute
 Stromboidea - Rostellariidae
Calyptraphorus sp. Conrad 1857 snail
Echinoidea
 Spatangoida - Loveniidae
"Maretia arguta" = Hemipatagus argutus
"Maretia arguta" = Hemipatagus argutus Clark and Twitchell 1915 heart urchin
 Clypeasteroida - Protoscutellidae
 Ichnofossils -
Ophiomorpha sp. Lundgren 1891