MGS #88a (Oligocene of the United States)

Where: Wayne County, Mississippi (31.7° N, 88.7° W: paleocoordinates 31.9° N, 82.2° W)

• coordinate based on political unit

When: Forest Hill Formation, Rupelian (33.9 - 28.1 Ma)

• The upper part of the Forest Hill Formation consists of estuarine clays and sands which locally contain a marine fauna. In Wayne County, numerous well preserved fossils were collected from sand lenses in this interval. Also present in this interval are leaf fossils which occur along bedding planes in the clay. These estuarine and marine sediments are the initial stage in the marine transgression of the Mint Spring seaway.

• formation-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, gray, silty, sandy sandstone and siltstone

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 5805: authorized by Linda Ivany, entered by Sarah DeLong on 03.12.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• A catagory system was used to describe the abundances of the specimens. "R" 1-9 specimens = rare. "C" 10-99 specimens = common. "A" 100+ specimens = abundant.

•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.

 Cardiida - Veneridae
Pitar aldrichi n. sp. venus clam
C category
Pitar megacostata n. sp. venus clam
R category
Callista sobrina venus clam
R category
 Cardiida - Chamidae
"Chama mississippiensis" = Chama (Psilopus) mississippiensis
"Chama mississippiensis" = Chama (Psilopus) mississippiensis Conrad 1848 jewel box
R category
 Cardiida - Ungulinidae
"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea Conrad 1848 clam
R category
Timothynus turgida Conrad 1848 clam
R category
 Cardiida - Mactridae
Spisula inaequilateralis clam
R category
 Cardiida - Tellinidae
Tellina subprotexta n. sp. tellin clam
R category
 Cardiida - Semelidae
Ervilia exterolaevis n. sp. clam
C category
 Cardiida - Cardiidae
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle
R category
Agnocardia glebosum Conrad 1848 cockle
R category
Trachycardium eversum Conrad 1848 cockle
R category
 Pholadida - Corbulidae
Corbula rufaripa n. sp. clam
R category
Corbula engonata Conrad 1848 clam
R category
 Lucinida - Lucinidae
Myrtea vicksburgensis Casey 1903 clam
C category
 Arcida - Arcidae
Scapharca delicatula Casey 1903 clam
C category
 Pectinida - Pectinoidae
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus, "Spondylus filiaris" = Spondylus (Spondylus) filiaris
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop
R category
"Spondylus filiaris" = Spondylus (Spondylus) filiaris Dall 1916 scallop
R category
 Ostreida - Ostreidae
Lopha vicksburgensis Conrad 1848 oyster
R category
 Nuculida - Nuculidae
Nucula vicksburgensis Conrad 1848 nut clam
C category
Brevinucula pseudopunctata n. sp. Dockery 1982 nut clam
R category
 Nuculanida - Yoldiidae
Yoldia clydoniona Dockery 1982 clam
R category
 Lepetellida - Fissurellidae
Merisca aequistriata
"Tellina lintea" = Merisca aequistriata
"Tellina lintea" = Merisca aequistriata Say 1824
R category