UC bulk sample [St Mary's Fm] (Miocene of the United States)

Where: Calvert County, Maryland (38.4° N, 76.4° W: paleocoordinates 38.5° N, 74.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: St Mary's Formation (Chesapeake Group), Late/Upper Miocene (11.6 - 5.3 Ma)

• STRATIGRAPHIC RELATIONS: Unknown member of St Mary's Fm, Chesapeake Group. AGE: Late Miocene (equivalent to Tortonian) according to Ward (1992). STRATIGRAPHIC POSITION: Unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, coarse-grained, shelly/skeletal sandstone

• ENVIRONMENT: Shallow-marine, restricted/sheltered, fine-grained siliciclastic environment.
• SPECIFIC LITHOLOGY: Coase sandstone, shelly. LITHIFICATION: Poorly lithified, based on observation of specimens.

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, sieve,

• COLLECTOR: Unknown collector. presumably K. Caster, 1960's. REPOSITORY: Department of Geology, University of Cincinnati.

Primary reference: A. J. W. Hendy, D. P. Buick, K. V. Bulinski, C. A. Ferguson, and A. I. Miller. 2008. Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions. [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 69032: authorized by Austin Hendy, entered by Austin Hendy on 15.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• TAXONOMY: Identified by A. Hendy; nomenclature based on revision of Gardner (1943) [PBDB Ref# 16984]and Ward (1992) [16985].
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium attenuatum Say 1824 tusk shell
Bivalvia
 Lucinida - Lucinidae
Lucinoma contracta Say 1824 clam
 Pandorida - Pandoridae
Pandora sp. Bruguière 1797 clam
 Pholadida - Corbulidae
Corbula inaequalis Say 1824 clam
 Cardiida - Cardiidae
Chesacardium laqueatum Conrad 1830 cockle
 Cardiida - Psammobiidae
Psammobia gubernatoria Glenn 1904 clam
 Cardiida - Tellinidae
Tellinidae indet. Blainville 1814 tellin clam
 Cardiida - Veneridae
"Dosinia (Dosinidia) acetabulum" = Dosinia acetabulum Conrad 1832 venus clam
Mercenaria campechiensis Gmelin 1791 quahog
Mercenaria tetrica Conrad 1838 quahog
Clementia (Clementia) inoceriformis Wagner 1839 venus clam
 Cardiida - Mactridae
Mactrodesma subponderosa d'Orbigny 1852 clam
"Spisula" subcuneata Conrad 1838 clam
 Solenida - Pharidae
Ensis directus Conrad 1844 clam
 Carditida - Astartidae
Astarte perplana Conrad 1840 clam
 Pectinida - Pectinoidae
Chesapecten sp. Ward and Blackwelder 1975 scallop
 Arcida - Arcidae
Dallarca idonea Conrad 1832 clam
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula fornicata, "Crucibulum (Crucibulum) costatum" = Crucibulum (Dispotaea) costata
Crepidula fornicata Linnaeus 1758 slipper shell
"Crucibulum (Crucibulum) costatum" = Crucibulum (Dispotaea) costata Say 1820 slipper shell
 Neogastropoda - Muricidae
Urosalpinx subrusticus d'Orbigny 1852 murex snail
 Neogastropoda - Volutidae
Volutifusus mutabilis Conrad 1834 volute
 Neogastropoda - Melongenidae
 Neogastropoda - Columbellidae
Astyris communis Conrad 1862 snail
 Neogastropoda - Nassariidae
Bulliopsis quadrata Conrad 1830 snail
Bulliopsis marylandica Conrad 1862 snail
 Neogastropoda - Cancellariidae
"Cancellaria (Cancellaria) alternata" = Cancellaria alternata
"Cancellaria (Cancellaria) alternata" = Cancellaria alternata Conrad 1834 snail
 Neogastropoda - Conidae
Conus deluvianus Green 1830 cone shell
 Neogastropoda - Mangeliidae
"Mangelia sp." = Cythara (Mangelia)
"Mangelia sp." = Cythara (Mangelia) Loven 1846 snail
Listed as "Mangilia" sp.
 Neogastropoda - Turridae
Polystira communis Conrad 1830 turrid
 Sorbeoconcha - Naticidae
Euspira heros Say 1822 moon snail
Neverita duplicatus Say 1822 moon snail
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell