MGS Loc. 93 (Oligocene of the United States)

Where: Smith County, Mississippi (32.0° N, 89.4° W: paleocoordinates 32.3° N, 82.9° 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,calyey sands.Here fossils are well preserved except at the Marquette Cement Mfg. Company quarry. Here, the Byram Formation consists largely of calcium carbonate and fossils are poorly preserved.

• formation-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, shelly/skeletal, 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 6002: authorized by Linda Ivany, entered by Sarah DeLong on 13.01.2000, edited by Austin Hendy

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 - Condylocardiidae
Carditella aldrichi Harris 1919 clam
R category
 Carditida - Astartidae
Astarte triangulata Meyer 1886 clam
R category
 Carditida - Crassatellidae
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis, Crassinella variablis n. sp.
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis Conrad 1848 clam
C category
Crassinella variablis n. sp. Dockery 1982 clam
C category
 Poromyida - Cuspidariidae
Cuspidaria sp. Dall 1886 clam
R category
 Poromyida - Verticordiidae
Verticordia dalliana clam
R category
 Cardiida - Sportellidae
Sportella oblonga Conrad 1848 clam
R category
 Cardiida - Veneridae
Chamelea mississippiensis venus clam
R category
Pitar semipunctata venus clam
100+ valves collected
Pitar imitabilis venus clam
C category
"Chione victoria" = Lirophora (Lirophora) victoria Dall 1982 venus clam
R category
"Ventricolaria ucuttana" = Globivenus venus clam
R category
 Cardiida - Chamidae
"Chama mississippiensis" = Chama (Psilopus) mississippiensis
"Chama mississippiensis" = Chama (Psilopus) mississippiensis Conrad 1848 jewel box
C category
 Cardiida - Ungulinidae
Diplodonta elatia n. sp. clam
R category
"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea Conrad 1848 clam
R category
Timothynus turgida Conrad 1848 clam
R category
 Cardiida - Mactridae
Spisula funerata clam
R category
Spisula mississippiensis clam
R category
 Cardiida - Kelliidae
Bornia tallahalaensis n. sp. Dockery 1982 clam
R category
 Cardiida - Tellinidae
Tellina vicksburgensis Conrad 1848 tellin clam
C category
Tellina serica Conrad 1848 tellin clam
R category
 Cardiida - Psammobiidae
Gari papyria clam
R category
 Cardiida - Solecurtidae
Solecurtus vicksburgensis Aldrich 1885 clam
R category
 Cardiida - Semelidae
Ervilia lamelloexteria n. sp. clam
100+ valves collected
Semele mississippiensis clam
C category
Abra pectorosa abra
C category
 Cardiida - Cardiidae
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle
C category
Dinocardium vicksburgensis cockle
C category
Agnocardia glebosum Conrad 1848 cockle
R category
Trachycardium eversum Conrad 1848 cockle
C category
 Pholadida - Pholadidae
Jouannetia triquetra clam
R category
 Pholadida - Corbulidae
Corbula engonata, "Corbula laqueata" = Varicorbula laqueata
Corbula engonata Conrad 1848 clam
C category
"Corbula laqueata" = Varicorbula laqueata Casey 1903 clam
C category
 Hiatellida - Hiatellidae
Panopea oblongata Conrad 1848 clam
R category
 Lucinida - Lucinidae
Myrtea vicksburgensis Casey 1903 clam
R category
Lucina posteocurta n. sp. Dockery 1982 clam
C category
"Lucina choctavensis" = Lucina (Callucina) choctavensis Meyer 1886 clam
R category
Lucina varisculpta n. sp. Dockery 1982 clam
R category
 Arcida - Glycymerididae
Glycymeris arctata Conrad 1848 clam
R category
 Arcida - Arcidae
"Scapharca lesueuri" = Cunearca lesueuri, Scapharca chordicosta n. sp., "Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis
"Scapharca lesueuri" = Cunearca lesueuri Dall 1848 ark
C category
Scapharca chordicosta n. sp. clam
R category
"Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis Conrad 1848 clam
R category
 Pectinida - Plicatulidae
Plicatula variplicata n. sp. Dockery 1982 scallop
R category
 Pectinida - Pectinoidae
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop
C category
Pecten byramensis scallop
100+ valves collected
Chlamys redwoodensis n. sp. Dockery 1982 scallop
R category
"Spondylus filiaris" = Spondylus (Spondylus) filiaris Dall 1916 scallop
R category
 Ostreida - Ostreidae
Lopha vicksburgensis Conrad 1848 oyster
C category
Ostrea sp. Linnaeus 1758 oyster
R category
Ostrea paroxis Lesueur 1829 oyster
R category
 Ostreida - Pinnidae
Atrina argentea Conrad 1848 oyster
R category
 Ostreida - Pteriidae
Pteria argentea Conrad 1848 pearl oyster
C category
 Mytilida - Crenellidae
Crenella fenestra n. sp. Dockery 1982 clam
R category
 Nuculida - Nuculidae
Nucula tallahalaensis n. sp. Dockery 1982 nut clam
R category
Nucula vicksburgensis Conrad 1848 nut clam
C category
 Nuculanida - Nuculanidae
Nuculana akidota n. sp. Dockery 1982 pointed nut clam
100 + valves collected
Gastropoda
 Sorbeoconcha - Vermetidae
Serpulorbis sp.1 Sasso 1827 worm shell
 Sorbeoconcha - Vitrinellidae
 Neogastropoda - Terebridae
Terebra divisura1 auger snail
Terebra tantula1 Conrad 1848 auger snail
 Neogastropoda - Clathurellidae
Varicobela aldrichi n. sp.1 snail
 Neogastropoda - Conidae
"Conus alveatus" = Conus sauridens1
"Conus alveatus" = Conus sauridens1 Conrad 1833 cone shell
INCLUDES: Conus alveatus spiralis
 Neogastropoda - Turridae
Scobinella pluriplicata1 turrid
Scobinella pluriplicata subpluriplicata
Scobinella caelata1 Conrad 1848 turrid
"Coronia tenella" = Gemmula (Coronia)1 turrid
 Neogastropoda - Olivellidae
"Oliva mississippiensis" = Agaronia mississippiensis1
"Oliva mississippiensis" = Agaronia mississippiensis1 Conrad 1848 snail
 Neogastropoda - Olividae
Oliva affluens1 olive snail
 Neogastropoda - Costellariidae
Vexillum tallahalaensis n. sp.1 ribbed mitre
 Neogastropoda - Muricidae
Siphonochelus curvirostratus1 Conrad 1848 murex snail
 Neogastropoda - Harpidae
 Neogastropoda - Volutidae
Lyria mississippiensis1 Conrad 1843 volute
 Neogastropoda - Nassariidae
"Tritiaria mississippiensis" = Nassarius (Tritiaria)1
"Tritiaria mississippiensis" = Nassarius (Tritiaria)1 snail
 Neogastropoda - Fasciolariidae
Dolicholatirus exilis1 Gabb 1873 snail
Dolicholatirus exilis confertus
 Sorbeoconcha - Cassidae
 Sorbeoconcha - Personidae
 Sorbeoconcha - Cypraeidae
Cypraeorbis sphaeroides1 Conrad 1848 cowry
 Pseudomelanoidea - Pseudomelaniidae
Crassispira abundans1 Conrad 1840 snail
 Heterostropha - Acteonidae
Acteon meyeri n. sp.1
Acteon meyeri n. sp.1 snail
 Trochoidea - Turbinidae
Arene nodosa n. sp.1
Arene nodosa n. sp.1 snail
 Trochoidea - Trochidae
Calliostoma sp.1 Swainson 1840 top snail
 Trochoidea - Solariellidae
 Opisthobranchia - Cylichnidae
Scaphander hilgardi n. sp.1 snail
Thecostraca
 Balanomorpha - Chelonibiidae
Chelonibia melleni2 Zullo 1982 turtle barnacle
Merisca aequistriata
  -
"Tellina lintea" = Merisca aequistriata
"Tellina lintea" = Merisca aequistriata Say 1824
R category