PRI 20 (Eocene of the United States)

Where: Catahoula County, Louisiana (31.6° N, 91.8° W: paleocoordinates 32.3° N, 84.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Danville Landing Member (Yazoo Formation), Priabonian (38.0 - 33.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, concretionary, gypsiferous, shelly/skeletal, yellow, blue, argillaceous, calcareous mudstone

• Environment from PBDB col# 45017.
• "blue to yellow, calcareous, gypsiferous, fossiliferous, argillaceous, concretionary clay and mudstone." "data assembled from surface sections and shallow borings indicates a thickness of at least 100ft." Lithology form PBDB col # 45017.

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 98687: authorized by Jocelyn Sessa, entered by Laurie Eccles on 19.10.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Scaphopoda
 Dentaliida - Dentaliidae
Dentalium (Antalis) danvillense Harris and Palmer 1947 tusk shell
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica (Stellaxis) alveata" = Architectonica (Stellaxis) alveatum
"Architectonica (Stellaxis) alveata" = Architectonica (Stellaxis) alveatum Conrad 1833 sundial
Architectonica (Stellaxis) alveata A
 Cerithioidea - Turritellidae
"Turritella arenicola" = Kapalmerella arenicola Conrad 1865 turret shell
Including Turritella arenicola danvillensis
Turritella clevelandia Harris 1894 turret shell
 Sorbeoconcha - Naticidae
Sinum danvillense Harris and Palmer 1947 moon snail
 Neogastropoda - Buccinidae
Siphonalia sullivani Harris and Palmer 1947 true whelk
Siphonalia sullivani ouachitae
Pseudoliva vetusta Conrad 1833 true whelk
Pseudoliva vetusta perspectiva
 Neogastropoda - Melongenidae
Levifusus fulguriparens Maury 1909 snail
 Neogastropoda - Muricidae
Hexaplex (Hexaplex) supernus Harris and Palmer 1947 murex snail