LGS 18 (Paleocene of the United States)

Where: Natchitoches County, Louisiana (31.7° N, 93.4° W: paleocoordinates 35.2° N, 76.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Marthaville Formation (Wilcox Group), Thanetian (59.2 - 56.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

• Impressions found in ferruginous concretions.

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Primary reference: J. O. Barry and R. J. LeBlanc. 1942. Lower Eocene Faunal Units of Lousiana. Geological Bulletin of the state of Louisiana Dept. of Conservation (23)1-208 [J. Sessa/L. Eccles/L. Eccles]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105201: authorized by Jocelyn Sessa, entered by Laurie Eccles on 17.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Cardiida - Cardiidae
"Cardium (Cerastoderma) tuomeyi" = Acanthocardia (Schedocardia) tuomeyi
"Cardium (Cerastoderma) tuomeyi" = Acanthocardia (Schedocardia) tuomeyi Aldrich 1886 cockle
Cardium (Cerastoderma) tuomeyi var.
 Carditida - Carditidae
Venericardia (Venericor) densata Conrad 1845 clam
Venericardia (Venericor) densata pendletonensis
Gastropoda
 Neogastropoda - Buccinidae
 Neogastropoda - Nassariidae
"Buccinanops ellipticum" = Bullia (Buccinanops)
"Buccinanops ellipticum" = Bullia (Buccinanops) snail
 Neogastropoda - Volutidae