PRI 16 (Eocene of the United States)

Where: Caldwell County, Louisiana (32.0° N, 92.1° W: paleocoordinates 33.0° N, 83.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Moodys Branch Formation (Jackson Group), Bartonian (41.3 - 38.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: offshore; unlithified, argillaceous, calcareous siltstone

• Contains burrows unlithified argillaceous,calcareous siltstone-lithological description and Environment from PBDB collection #1418

Size class: mesofossils

Collection methods: Collected by G.D. Harris, October 7, 1940.

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 92304: authorized by Jocelyn Sessa, entered by Laurie Eccles on 05.11.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Carditida - Astartidae
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica (Solariaxis) acuta" = Architectonica acuta
"Architectonica (Solariaxis) acuta" = Architectonica acuta Conrad 1854 sundial
 Sorbeoconcha - Naticidae
Natica permunda Conrad 1854 moon snail
 Neogastropoda - Volutidae
Lapparia dumosa Conrad 1854 volute
including Lapparia dumosa exiqua
 Neogastropoda - Conidae
"Conus tortilis" = Conus sauridens
"Conus tortilis" = Conus sauridens Conrad 1833 cone shell
 Neogastropoda - Buccinidae
Pseudoliva vetusta Conrad 1833 true whelk
Pseudoliva vetusta perspectiva
 Neogastropoda - Fasciolariidae
"Cornulina dalli" = Mazzalina dalli Harris 1894 snail
Cornulina dalli cetaria
Papillina dumosa Conrad 1854 snail
 Sorbeoconcha - Rostellariidae
 Sorbeoconcha - Vermetidae
Serpulorbis chavani Harris and Palmer 1947 worm shell
 Sorbeoconcha - Capulidae
Capulus americanus Conrad 1854 snail
 Cerithioidea - Turritellidae
"Turritella alveata" = Kapalmerella alveata
"Turritella alveata" = Kapalmerella alveata Conrad 1854 turret shell