MGS #114 (Oligocene of the United States)

Where: Warren County, Mississippi (32.3° N, 90.9° W: paleocoordinates 32.7° N, 84.3° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Byram Formation, Rupelian (33.9 - 28.1 Ma)

• The Byram is the middle formation in a regressive sequence.

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; unlithified, argillaceous sandstone

• fossiliferous, clayey sands

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, mechanical,

• Bivalves only

Primary reference: D. T. Dockery. 1982. Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources Bureau of Geology 123:1-261 [L. Ivany/S. DeLong/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 7112: authorized by Linda Ivany, entered by Elizabeth Kowalski on 26.04.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• bivalves only**abundances are given as counts ONLY for those species with fewer than 100 specimens - for 100 or more, he just gives "A" for "abundant". In the case where a collection includes an "A", we enter abundance classes for species instead of counts as follows: Fewer than 10 specimens = R (rare)10 to 99 specimens = C (common)Greater than 99 specimens(Dockery's "A") = A (abundant)In this reference, "specimens" equals "valves"
Show authors, comments, and common names
Gastropoda
 Neogastropoda - Olividae
Oliva affluens
Oliva affluens olive snail
 Neogastropoda - Olivellidae
"Oliva mississippiensis" = Agaronia mississippiensis
"Oliva mississippiensis" = Agaronia mississippiensis Conrad 1848 snail
 Neogastropoda - Muricidae
Siphonochelus curvirostratus
Siphonochelus curvirostratus Conrad 1848 murex snail
 Neogastropoda - Nassariidae
"Tritiaria mississippiensis" = Nassarius (Tritiaria)
"Tritiaria mississippiensis" = Nassarius (Tritiaria) snail
 Neogastropoda - Melongenidae
Volema hopkinsi n. sp.
Volema hopkinsi n. sp. snail
 Neogastropoda - Fasciolariidae
Latirus protractus
 Neogastropoda - Costellariidae
Vexillum cellulifera
 Neogastropoda - Turridae
Pleuroliria cochlearis, "Coronia tenella" = Gemmula (Coronia), Scobinella pluriplicata, Scobinella caelata
"Coronia tenella" = Gemmula (Coronia) turrid
Scobinella pluriplicata turrid
Scobinella pluriplicata subpluriplicata
Scobinella caelata Conrad 1848 turrid
 Neogastropoda - Conidae
Conus protractus, "Conus alveatus" = Conus sauridens
Conus protractus cone shell
"Conus alveatus" = Conus sauridens Conrad 1833 cone shell
 Neogastropoda - Borsoniidae
Bathytoma congesta
 Neogastropoda - Terebridae
Terebra divisura, Terebra tantula
Terebra divisura auger snail
Terebra tantula Conrad 1848 auger snail
 Sorbeoconcha - Personidae
Distorsio crassidens
 Sorbeoconcha - Cassidae
Semicassis caelatura
Bivalvia
 Arcida - Glycymerididae
Glycymeris arctata
Glycymeris arctata Conrad 1848 clam
 Arcida - Arcidae
"Scapharca lesueuri" = Cunearca lesueuri, Barbatia (Cucullaearca) lima
"Scapharca lesueuri" = Cunearca lesueuri Dall 1848 ark
Barbatia (Cucullaearca) lima Conrad 1848 clam
Barbatia (Cucullaearca) lima
 Pectinida - Pectinoidae
Pecten byramensis
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium strenuum, Dentalium mississippiense
Dentalium mississippiense Conrad 1848 tusk shell