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
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•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.
Gastropoda | |
Acteon meyeri n. sp.1
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Arene nodosa n. sp.1
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Scaphander hilgardi n. sp.1
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Cyclostremiscus quadracordata n. sp.1
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"Tritiaria mississippiensis" = Nassarius (Tritiaria)1
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Varicobela aldrichi n. sp.1
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"Conus alveatus" = Conus sauridens1
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Scobinella pluriplicata1, Scobinella caelata1, "Coronia tenella" = Gemmula (Coronia)1, Pleuroliria cochlearis1
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"Oliva mississippiensis" = Agaronia mississippiensis1
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Vexillum tallahalaensis n. sp.1
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Bivalvia | |
Nuculana akidota n. sp.
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Crenella fenestra n. sp.
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"Spondylus filiaris" = Spondylus (Spondylus) filiaris, Chlamys redwoodensis n. sp., Pecten byramensis, "Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop C category
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Plicatula variplicata n. sp.
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"Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis, Scapharca chordicosta n. sp., "Scapharca lesueuri" = Cunearca lesueuri
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Agnocardia glebosum, Dinocardium vicksburgensis, "Nemocardium diversum" = Nemocardium (Nemocardium) diversum, Trachycardium eversum
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Diplodonta elatia n. sp., Timothynus turgida, "Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea
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"Chama mississippiensis" = Chama (Psilopus) mississippiensis
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"Chione victoria" = Lirophora (Lirophora) victoria, "Ventricolaria ucuttana" = Globivenus, Pitar semipunctata, Pitar imitabilis, Chamelea mississippiensis
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Bornia tallahalaensis n. sp.
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"Corbula laqueata" = Varicorbula laqueata, Corbula engonata
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Myrtea vicksburgensis, Lucina posteocurta n. sp., Lucina varisculpta n. sp., "Lucina choctavensis" = Lucina (Callucina) choctavensis
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"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis, Crassinella variablis n. sp.
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis Conrad 1848 clam C category
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Thecostraca | |
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Merisca aequistriata | |
"Tellina lintea" = Merisca aequistriata
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