MGS Loc. 99a - Cleary [Mint Spring Fm] (Oligocene of the United States)

Where: Rankin 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: Mint Spring Formation, Rupelian (33.9 - 28.1 Ma)

• The Mint Spring Formation is mostly fossiliferous sands that lie disconformably above the Forest Hill Formation. This contact is characterized by shell gravels that are largely comprised of the bivalve "Callista" by lithified clay clasts bored by the bivalve "Jouannetia", and by shark and ray teeth. Lithified clay clasts are especially common at the base of the Mint Spring Formation alnog the Chickasawhay River in Wayne County. Here clay clasts are numerous enough to have created a cobble bottom on the Mint Spring sea floor. These clasts formed a hard substrate utilized by a variety of encrusting organisms. The sands of the Mint Spring Formation are moderately clean, and often show evidence of cross-bedding. These sands have macrofauna dominated by bivalves.

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, conglomeratic, calcareous conglomerate and wackestone

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 5943: authorized by Linda Ivany, entered by Sarah DeLong on 03.01.2000, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• list uses catagories to denote values. For example: R = rare, 1 - 9 organisms found. C = common, 10 - 99 organisms found. A = abundant 100+ organisms found.

•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.

unclassified
  -
Vetidrillia palmerae n. gen. n. sp.1
Vetidrillia palmerae n. gen. n. sp.1
Gastropoda
 Cerithioidea - Cerithiidae
"Semivertagus menthafontis n. sp." = Clava (Semivertagus)1
"Semivertagus menthafontis n. sp." = Clava (Semivertagus)1 cerith snail
 Sorbeoconcha - Aporrhaidae
 Neogastropoda - Mitridae
Mitra conquista1 mitre shell
 Neogastropoda - Olividae
Oliva affluens1 olive snail
 Neogastropoda - Buccinidae
 Neogastropoda - Fasciolariidae
 Neogastropoda - Melongenidae
 Neogastropoda - Cochlespiridae
"Tropiscurcula caseyi" = Tropisurcula1, Cochlespira cookei n. sp.1
"Tropiscurcula caseyi" = Tropisurcula1 snail
Cochlespira cookei n. sp.1 snail
 Neogastropoda - Conidae
"Conus alveatus" = Conus sauridens1
"Conus alveatus" = Conus sauridens1 Conrad 1833 cone shell
 Neogastropoda - Borsoniidae
Bathytoma congesta1 snail
Bathytoma congesta fontis
 Neogastropoda - Terebridae
Terebra divisura1 auger snail
Terebra divisura clearyensis
 Neogastropoda - Turridae
Scobinella pluriplicata1 turrid
Scobinella pluriplicata subpluriplicata
 Neogastropoda - Costellariidae
Microsurcula mentha n. sp.1 ribbed mitre
 Neogastropoda - Muricidae
 Neogastropoda - Volutidae
Lyria mississippiensis1 Conrad 1843 volute
 Neogastropoda - Cancellariidae
 Sorbeoconcha - Ficidae
Ficus mississippiensis1 Conrad 1848 fig shell
 Sorbeoconcha - Cassidae
Cassis flintensis1 Mansfield 1940 snail
Sconsia lintea1 Conrad 1848 snail
Phalium menthafons n. sp.1 MacNeil and Dockery 1984 snail
 Sorbeoconcha - Ranellidae
Sassia conradiana1 triton shell
Sassia conradiana menthafons
 Sorbeoconcha - Eocypraeidae
Sulcocypraea lintea1 Conrad 1848 snail
Sulcocypraea lintea menthafons
 Sorbeoconcha - Naticidae
"Ampullinopsis mississippiensis" = Natica mississippiensis1
"Ampullinopsis mississippiensis" = Natica mississippiensis1 Conrad 1848 moon snail
 Sorbeoconcha - Vitrinellidae
Discopsis pilsbryi n. sp.1 snail
 Heterostropha - Acteonidae
Acteon meyeri n. sp.1 snail
Acteon menthafons n. sp.1 snail
 Heterostropha - Ringiculidae
Ringicula crassata n. sp.1 snail
Ringicula mississippiensis1 Conrad 1848 snail
Ringicula mississippiensis petila
 Heterostropha - Pyramidellidae
Eulimella clearyensis n. sp.1 snail
 Heterostropha - Architectonicidae
 Opisthobranchia - Cylichnidae
Acteocina crassiplica1 barrel-bubble
INCLUDES: Acteocina crassiplica altispira
 Opisthobranchia - Retusidae
Volvulella subspinosa n. sp.1 snail
Bivalvia
 Arcida - Arcidae
"Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis Conrad 1848 clam
R category
Trinacria menthifontis n. sp. Dockery 1982 clam
R category
Scapharca chordicosta n. sp. clam
R category
Scapharca delicatula Casey 1903 clam
C category
 Arcida - Glycymerididae
Glycymeris arctata Conrad 1848 clam
C category
Glycymeris suwannensis Mansfield 1937 clam
R category
 Arcida - Limopsidae
Limopsis sp. Sassi 1827 clam
R category
 Pectinida - Anomiidae
Anomia microstriata n. sp. Dockery 1982 jingle
R category
 Pectinida - Limidae
Limaria staminea Conrad 1848 file clam
R category
 Pectinida - Pectinoidae
"Chlamys menthifontis" = Chlamys (Lyropecten) menthifontis, "Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus, "Pecten poulsoni" = Pecten (Pecten) poulsoni
"Chlamys menthifontis" = Chlamys (Lyropecten) menthifontis Glawe 1970 scallop
100+ valves collected
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop
C category
"Pecten poulsoni" = Pecten (Pecten) poulsoni Morton 1834 scallop
100+ valves collected
 Ostreida - Pteriidae
Pteria argentea Conrad 1848 pearl oyster
R category
 Ostreida - Pinnidae
Atrina argentea Conrad 1848 oyster
R category
 Ostreida - Ostreidae
Lopha vicksburgensis Conrad 1848 oyster
R category
Ostrea sp. Linnaeus 1758 oyster
R category
Ostrea paroxis Lesueur 1829 oyster
C category
 Mytilida - Crenellidae
Crenella fenestra n. sp. Dockery 1982 clam
C category
 Mytilida - Mytilidae
Arcoperna linteata n. sp. Dockery 1982 mussel
R category
 Lucinida - Lucinidae
Lucina imbricolamella n. sp. Dockery 1982 clam
C category
Lucina triloba n. sp. Dockery 1982 clam
R category
"Divaricella subrigaultiana" = Divaricella (Divalinga) subrigaultiana Meyer 1886 clam
R category
Lucina posteocurta n. sp. Dockery 1982 clam
100+ valves collected
Myrtea vicksburgensis Casey 1903 clam
100+ valves collected
Anodontia mississippiensis Conrad 1848 clam
100+ valves collected
Lucina sp. Bruguière 1797 clam
R category
Lucina varisculpta n. sp. Dockery 1982 clam
C category
"Lucina choctavensis" = Lucina (Callucina) choctavensis Meyer 1886 clam
C category
 Poromyida - Cuspidariidae
Plectodon intastriata clam
R category
 Poromyida - Verticordiidae
Verticordia dalliana clam
C category
 Thraciida - Periplomatidae
Periploma macneili clam
R category
 Pholadida - Teredinidae
Teredo sp. Linnaeus 1758 clam
R category
 Pholadida - Corbulidae
Corbula rufaripa clam
C category
Corbula engonata Conrad 1848 clam
100+ valves collected
"Corbula laqueata" = Varicorbula laqueata Casey 1903 clam
100+ valves collected
Tiza alta clam
R category
 Cardiida - Sportellidae
Sportella oblonga Conrad 1848 clam
C category
 Cardiida - Chamidae
Chama sp. Linnaeus 1758 jewel box
R category
 Cardiida - Veneridae
Callista goniopisthus venus clam
C category
Callista sobrina venus clam
100+ valves collected
Pitar aldrichi venus clam
R category
Pitar megacostata venus clam
R category
"Chione victoria" = Lirophora (Lirophora) victoria Dall 1982 venus clam
R category
Chione craspedonta venus clam
R category
 Cardiida - Ungulinidae
"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea
"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea Conrad 1848 clam
C category
 Cardiida - Mactridae
Spisula inaequilateralis clam
C category
Spisula mississippiensis clam
R category
 Cardiida - Cardiidae
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle
100+ valves collected
Agnocardia glebosum Conrad 1848 cockle
R category
Trachycardium planicostata n. sp. Dockery 1982 cockle
C category
Laevicardium leptorimum n. sp. Dockery 1982 cockle
C category
 Cardiida - Donacidae
Donax funerata Conrad 1848 clam
R category
 Cardiida - Tellinidae
Tellina subprotexta n. sp. tellin clam
100+ valves collected
Tellina vicksburgensis Conrad 1848 tellin clam
R category
 Cardiida - Psammobiidae
Gari papyria clam
R category
 Cardiida - Semelidae
Semele staminea clam
R category
Semele mississippiensis clam
R category
Ervilia exteroaevis n. sp. clam
C category
Semelina pilsbryi clam
C category
 Hiatellida - Hiatellidae
Panopea oblongata Conrad 1848 clam
R category
 Carditida - Astartidae
Astarte menthifontis n. sp. Dockery 1982 clam
100+ valves collected
Astarte planilamella 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
Crassinella variablis n. sp. Dockery 1982 clam
C category
 Nuculida - Nuculidae
Nucula vicksburgensis Conrad 1848 nut clam
100+ valves collected
 Nuculanida - Yoldiidae
Yoldia serica Conrad 1848 clam
100+ valves collected
Scaphopoda
 Gadilida - Gadilidae
 Dentaliida - Dentaliidae
Dentalium opaculum1 tusk shell
Dentalium varicostata n. sp.1 tusk shell
 Dentaliida - Fustiariidae
Fustiaria sp.1 Stoliczka 1868 tusk shell
Fustiaria menthafonta n. sp.1 tusk shell
Thecostraca
 Balanomorpha - Chelonibiidae
Chelonibia melleni2 Zullo 1982 turtle barnacle