MGS 38 (Oligocene of the United States)

Where: Wayne County, Mississippi (31.8° N, 88.7° W: paleocoordinates 32.1° N, 82.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Red Bluff Formation, Rupelian (33.9 - 28.1 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; unlithified, glauconitic, gray, silty, sandy claystone and sandstone

• the red bluff formation as exposed in clark and wayne counties, mississippi, consists of fossiliferous, dark gray, silty clay with zones of ironstone concentrations in the lower part. these sediments disconformably overlie the blue - grey, blocky, marine clay of the shabuta clay, member of the yazoo formation and were deposited in shallow marine shelf, prodelta, and marginal delta bay enviroments. fossils occur in narrow glauconitic sand lenses within the clay.

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: surface (in situ), mechanical,

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 5612: authorized by Linda Ivany, entered by Sarah DeLong on 03.11.1999, edited by Laurie Eccles

Creative Commons license: CC BY (attribution)

Taxonomic list

• Bivalves only. **Abundances are given as counts only for those specimens with fewer than 100 specimens. For 100 or more, he just gives "A" for "abundant." In the case where the collection includes an "A", we enter abindance classes for specimens instead of counts as follows:Fewer than 10 specimens - R (rare). 10 - 99 specimens - C (common). Greater than 99 specimens (Dockerys "A") equals A, (abundant). In this reference, specimens equals valves.

•Since the very abundant taxa were not counted past 99 specimens, they were listed with a category of A otherwise, categories are listed in the comments field, absolute abundances are given in the abundance field.

 Dentaliida - Dentaliidae
 Gadilida - Gadilidae
 Carditida - Astartidae
Astarte triangulata Meyer 1886 clam
C category
 Carditida - Carditidae
"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis Dall 1903 clam
R category
 Cardiida - Veneridae
Pitar aldrichi n. sp., "Ventricolaria ucuttana" = Globivenus, Callista sobrina
Pitar aldrichi n. sp. venus clam
C category
"Ventricolaria ucuttana" = Globivenus venus clam
R category
Callista sobrina venus clam
R category
 Cardiida - Chamidae
Chama pappiladerma n. sp. Dockery 1982 jewel box
R category
 Cardiida - Semelidae
Abra pectorosa abra
R category
 Cardiida - Cardiidae
Nemocardium eocenense Meyer 1887 cockle
C category
Agnocardia glebosum Conrad 1848 cockle
R category
 Pholadida - Corbulidae
Corbula rufaripa n. sp. clam
99+ valves collected
Corbula engonata Conrad 1848 clam
R category
Tiza sp. clam
R category
 Lucinida - Lucinidae
Myrtea scopularis Casey 1903 clam
R category
Anodontia mississippiensis Conrad 1848 clam
R category
 Arcida - Glycymerididae
Glycymeris intercostata Gabb 1860 clam
R category
 Arcida - Arcidae
Scapharca invidiosa Casey 1903 clam
R category
 Pectinida - Pectinoidae
Chlamys cocoana, "Pecten perplanus" = Pecten (Pecten) perplanus, "Pecten (Pecten) perplanus" = Pecten (Pecten) perplanus1, "Spondylus dumosus" = Spondylus dumosus, "Spondylus (Spondylus) dumosus" = Spondylus dumosus1
Chlamys cocoana scallop
R category
"Pecten perplanus" = Pecten (Pecten) perplanus Morton 1833 scallop
C category
"Pecten (Pecten) perplanus" = Pecten (Pecten) perplanus1 Morton 1833 scallop
"Spondylus dumosus" = Spondylus dumosus Morton 1834 scallop
R category
"Spondylus (Spondylus) dumosus" = Spondylus dumosus1 Morton 1834 scallop
 Ostreida - Ostreidae
Lopha vicksburgensis Conrad 1848 oyster
C category
Ostrea sp. Linnaeus 1758 oyster
R category
 Ostreida - Pteriidae
Pteria argentea Conrad 1848 pearl oyster
R category
 Nuculida - Nuculidae
Nucula vicksburgensis Conrad 1848 nut clam
R category
 Nuculanida - Yoldiidae
Yoldia clydoniona n. sp. Dockery 1982 clam
C category
 Nautilida - Aturiidae
Aturia (cf. Aturia) alabamensis1 Morton 1834 nautiloid
 Cerithioidea - Turritellidae
 Cerithioidea - Cerithiidae
Bittium ottoi n. sp.2
Bittium ottoi n. sp.2 cerith snail
 Epitonioidea - Epitoniidae
 Sorbeoconcha - Capulidae
Capulus americanus2 Conrad 1854 snail
 Sorbeoconcha - Triphoridae
 Sorbeoconcha - Triforidae
 Sorbeoconcha - Ficidae
Ficus mississippiensis2 Conrad 1848 fig shell
 Neogastropoda - Terebridae
Terebra hiwanneensis n. sp.2 auger snail
 Neogastropoda - Clavatulidae
 Neogastropoda - Drilliidae
 Neogastropoda - Cochlespiridae
"Tropiscurcula caseyi" = Tropisurcula2, Cochlespira cookei2
"Tropiscurcula caseyi" = Tropisurcula2 snail
Cochlespira cookei2 snail
Cochlespira cookei rubracollis
 Neogastropoda - Clathurellidae
 Neogastropoda - Conidae
Conus protractus2, "Conus alveatus" = Conus sauridens2
Conus protractus2 cone shell
"Conus alveatus" = Conus sauridens2 Conrad 1833 cone shell
 Neogastropoda - Turridae
Scobinella caelata2 Conrad 1848 turrid
Pleurofusia hiwanneensis n. sp.2 turrid
Pleurofusia fessa n. sp.2 turrid
"Coronia ancilla" = Gemmula (Coronia)2 turrid
Gemmula amica2 Casey 1903 turrid
 Neogastropoda - Raphitomidae
Phandella transemma n. sp.2 snail
 Neogastropoda - Borsoniidae
Bathytoma rhomboidea2 snail
Bathytoma rhomboidea and Bathytoma rhomboidea lyrata
 Neogastropoda - Mitridae
Mitra conquista2, "Mitra (Fusimitra) conquisita" = Fusimitra conquisita1
Mitra conquista2 mitre shell
"Mitra (Fusimitra) conquisita" = Fusimitra conquisita1 Conrad 1848 mitre shell
 Neogastropoda - Costellariidae
Vexillum lintoidea2 ribbed mitre
 Neogastropoda - Muricidae
Chicoreus stetopus2 murex snail
Dermomurex cookei2 Vokes 1975 murex snail
 Neogastropoda - Volutidae
 Neogastropoda - Cancellariidae
 Neogastropoda - Buccinidae
Metula fastidiosa2 true whelk
Metula inflata2 true whelk
Metula neptuneiformis n. sp.2 true whelk
 Neogastropoda - Melongenidae
 Neogastropoda - Fasciolariidae
 Sorbeoconcha - Ranellidae
Sassia conradiana2 triton shell
 Sorbeoconcha - Cassidae
Sconsia prelintea n. sp.2, "Galeodaria shubutensis" = Galeodea2, "Mambrinia brevidentata" = Galeodea2, "Galeodea (Mambrinia) brevidentata" = Galeodea1
Sconsia prelintea n. sp.2 snail
"Galeodaria shubutensis" = Galeodea2 snail
"Mambrinia brevidentata" = Galeodea2 snail
"Galeodea (Mambrinia) brevidentata" = Galeodea1 snail
 Sorbeoconcha - Xenophoridae
Xenophora (Stellaria) conica2 carrier shell
Xenophora (Stellaria) conica
 Sorbeoconcha - Eocypraeidae
Sulcocypraea healeyi2 Aldrich 1923 snail
 Sorbeoconcha - Naticidae
Natica acuticallosa2, "Ampullinopsis mississippiensis" = Natica mississippiensis2, Sinum cf. danvillense2
"Ampullinopsis mississippiensis" = Natica mississippiensis2 Conrad 1848 moon snail
Sinum cf. danvillense2 Harris and Palmer 1947 moon snail
 Vanikoroidea - Eulimidae
 Vanikoroidea - Aclididae
Aclis sp.2 Loven 1846 aclis
 Heterostropha - Architectonicidae
Architectonica textilina2 sundial
Architectonica textilina casyei
 Heterostropha - Acteonidae
Tornatellaea ? sp.2 Conrad 1860 snail
Acteon subaldrichi n. sp.2 snail
Acteon meyeri n. sp.2 snail
 Heterostropha - Ringiculidae
Ringicula mississippiensis2 Conrad 1848 snail
Ringicula mississippiensis petila
 Heterostropha - Pyramidellidae
Eulimella sp.2 Forbes and MacAndrew 1846 snail
Eulimella clearyensis n. sp.2 snail
 Heterostropha - Mathildidae
Mathilda regularis2 Meyer 1886 snail
 Lepetellida - Lepetellidae
 Opisthobranchia - Cylichnidae
Acteocina crassiplica2 barrel-bubble
Acteocina crassiplica involuta
 Thecosomata -
 Thecosomata - Cavoliniidae
"Creseis hastata" = Creseis spina2
"Creseis hastata" = Creseis spina2 Reuss 1867 snail
 Thecosomata - Limacinidae
"Limacina cf. inflata" = Heliconoides inflata2
"Limacina cf. inflata" = Heliconoides inflata2 Orbigny 1836 snail
 Scleractinia - Dendrophylliidae
Balanophyllia (Balanophyllia) elongata1 Vaughan 1900 stony coral