MGS #94: Rupelian, Mississippi

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Architectonica trilirata Conrad 1847
MacNeil and Dockery 1984
Bivalvia - Mytilida - Mytilidae
Brachidontes mississippiensis (Conrad 1848)
1 individual
R category
Bivalvia - Arcida - Arcidae
Scapharca lesueuri (Dall 1848)
A category
recombined as Cunearca lesueuri
100+ valves collected
Bivalvia - Pectinida - Pectinidae
Eburneopecten subminutus (Aldrich 1903)
1 individual
recombined as Eburneopecten (Eburneopecten) subminutus
R category
Pecten byramensis
9 individuals
R category
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
6 individuals
R category
Bivalvia - Lucinida - Lucinidae
Lucina varisculpta n. sp. Dockery 1982
A category
100+ valves collected
Bivalvia - Pholadida - Corbulidae
Corbula engonata Conrad 1848
A category
100+ valves collected
Corbula laqueata Casey 1903
14 individuals
recombined as Varicorbula laqueata
C category
Bivalvia - Cardiida - Mactridae
Spisula funerata
2 individuals
R category
Bivalvia - Cardiida - Veneridae
Chamelea mississippiensis
20 individuals
C category
Callista sobrina
10 individuals
C category
Pitar imitabilis
2 individuals
R category
Bivalvia - Cardiida - Kelliidae
Bornia tallahalaensis n. sp. Dockery 1982
1 individual
R category
Bivalvia - Cardiida - Cardiidae
Dinocardium vicksburgensis
3 individuals
R category
Bivalvia - Cardiida - Tellinidae
Tellina vicksburgensis Conrad 1848
2 individuals
R category
Bivalvia - Cardiida - Semelidae
Ervilia lamelloexteria n. sp.
13 individuals
C category
Semelina pilsbryi
1 individual
R category
Bivalvia - Thraciida - Periplomatidae
Periploma macneili n. sp.
4 individuals
R category
Bivalvia - Poromyida - Verticordiidae
Verticordia dalliana
1 individual
R category
Bivalvia - Carditida - Astartidae
Astarte triangulata Meyer 1886
2 individuals
R category
Bivalvia - Carditida - Crassatellidae
Crassinella variablis n. sp. Dockery 1982
A category
100+ valves collected
Bivalvia - Nuculanida - Yoldiidae
Yoldia serica (Conrad 1848)
5 individuals
R category
Bivalvia - Nuculida - Nuculidae
Nucula vicksburgensis Conrad 1848
A category
100+ valves collected
Scaphopoda - Dentaliida - Dentaliidae
Dentalium mississippiense (Conrad 1848)
MacNeil and Dockery 1984
see common names

Geography
Country:United States State/province:Mississippi County:Smith
Coordinates: 32.0° North, 89.4° West (view map)
Paleocoordinates:32.3° North, 82.9° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
*Period:Early/Lower Tertiary *Epoch:Early/Lower Oligocene
*International age/stage:Early/Lower Rupelian - Early/Lower Rupelian
Key time interval:Rupelian
Age range of interval:33.90000 - 27.82000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Byram
Stratigraphic resolution:formation
Stratigraphy comments: The Byram Formation is fossiliferous, with clayey sands. Bivalves dominate Byram macrofauna.
Lithology and environment
Primary lithology:shelly/skeletal poorly lithified sandy,calcareous claystone
Secondary lithology: sandstone
Includes fossils?Y
Includes fossils?Y
Environment:offshore Tectonic setting:passive margin
Taphonomy
Modes of preservation:body,original aragonite,original calcite
Size of fossils:mesofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils,difficult macrofossils
Collection methods:bulk,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Bivalves only.
Taxonomic list comments: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.
Metadata
Database number:6003
Authorizer:L. Ivany Enterer:S. DeLong
Modifier:J. Sessa Research group:GCP,marine invertebrate
Created:2000-01-13 18:03:02 Last modified:2010-09-27 15:28:01
Access level:the public Released:2000-01-13 18:03:02
Creative Commons license:CC BY
Reference information

Primary reference:

323. 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]

Secondary references:

447 F. S. MacNeil and D. T. Dockery. 1984. Lower Oligocene Gastropoda, Scaphopoda, and Cephalopoda of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources, Bureau of Geology Bulletin 124:1-415 [L. Ivany/E. Kowalski/P. Wagner]