MGS #102 (Oligocene of the United States)

Where: Hinds County, Mississippi (32.2° N, 90.2° W: paleocoordinates 32.5° N, 83.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• The Byram Formation consists of Fossiliferous, clayey sands. Its macrofauna is dominated by bivalves.

• formation-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, sandy, calcareous claystone and sandstone

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: taxonomic analysis

PaleoDB collection 6004: authorized by Linda Ivany, entered by Sarah DeLong on 13.01.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• List uses catagories, for example, R = rare...1 - 9 valves collected. C = common...10 - 99 valves collected. A = abundant...100+ valves collected.

•Categories are listed in the comments field, absolute abundances are given in the abundance field.

•Since taxa with greater than 99 specimens were not counted with absolute abundances, these were reported with category "A" for abundant.

Bivalvia
 Carditida - Astartidae
Astarte menthifontis n. sp. Dockery 1982 clam
C category
 Carditida - Carditidae
"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis Dall 1903 clam
R category
 Carditida - Crassatellidae
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis Conrad 1848 clam
R category
 Poromyida - Verticordiidae
Verticordia dalliana clam
R category
 Cardiida - Veneridae
Chamelea mississippiensis venus clam
R category
Pitar imitabilis venus clam
R category
"Ventricolaria ucuttana" = Globivenus venus clam
R category
 Cardiida - Tellinidae
Tellina vicksburgensis Conrad 1848 tellin clam
C category
 Cardiida - Semelidae
Ervilia lamelloexteria n. sp. clam
R category
Semele mississippiensis clam
R category
 Cardiida - Cardiidae
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle
R category
Agnocardia glebosum Conrad 1848 cockle
R category
 Pholadida - Corbulidae
Corbula engonata, "Corbula laqueata" = Varicorbula laqueata
Corbula engonata Conrad 1848 clam
R category
"Corbula laqueata" = Varicorbula laqueata Casey 1903 clam
C category
 Hiatellida - Hiatellidae
Panopea oblongata Conrad 1848 clam
R category
 Lucinida - Lucinidae
Lucina posteocurta n. sp. Dockery 1982 clam
R category
Anodontia mississippiensis Conrad 1848 clam
R category
 Arcida - Glycymerididae
Glycymeris arctata Conrad 1848 clam
R category
 Arcida - Arcidae
"Scapharca lesueuri" = Cunearca lesueuri
"Scapharca lesueuri" = Cunearca lesueuri Dall 1848 ark
C category
 Pectinida - Pectinoidae
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop
R category
Pecten byramensis scallop
100+ valves collected
 Ostreida - Pteriidae
Pteria argentea Conrad 1848 pearl oyster
R category
 Mytilida - Crenellidae
Crenella fenestra Dockery 1982 clam
R category
 Nuculida - Nuculidae
Nucula vicksburgensis Conrad 1848 nut clam
R category
 Nuculanida - Nuculanidae
Nuculana akidota Dockery 1982 pointed nut clam
R category
 Nuculanida - Yoldiidae
Yoldia serica Conrad 1848 clam
R category
Merisca aequistriata
  -
"Tellina lintea" = Merisca aequistriata
"Tellina lintea" = Merisca aequistriata Say 1824
R category