78SK57 - Unit 3 (base): Serravallian, Maryland
collected by Kidwell 1978

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polychaeta - Spionida - Spionidae
Polydora sp. Bosk 1801
Gastropoda - Epitoniidae
"Scala" ? sayana Dall 1889
1 individual
synonym of Epitonium humphreysii
Gastropoda - Neotaenioglossa - Calyptraeidae
Crucibulum ? constrictum (Conrad 1842)
3 individuals
recombined as Crucibulum (Dispotaea) constrictum
Crucibulum multilineatum (Conrad 1842)
6 individuals
Gastropoda - Turritellidae
Turritella plebeia Say 1824
2 individuals
recombined as Mariacolpus plebeia
Turritella plebeius
Gastropoda - Naticidae
Lunatia heros (Say 1822)
5 individuals
recombined as Euspira heros
Gastropoda - Neogastropoda - Muricidae
Ecphora sp. Conrad 1843
Gastropoda - Trochidae
Calliostoma alphelium
5 individuals
Calliostoma philanthropus (Conrad 1834)
2 individuals
Bivalvia - Nuculanida - Nuculanidae
Nuculana liciata (Conrad 1843)
1 individual
Bivalvia - Nuculida - Nuculidae
Nucula ? taphria Dall 1898
1 individual
Bivalvia - Hiatellida - Hiatellidae
Hiatella arctica (Linnaeus 1767)
3 individuals
Panopea sp. (Menard 1807)
1 individual
Bivalvia - Solenida - Pharidae
Ensis sp. Schumacher 1817
1 individual
Bivalvia - Pholadida
? Myoidea indet. (Lamarck 1809)
1 individual
Bivalvia - Pholadida - Corbulidae
Bicorbula idonea (Conrad 1833)
6 individuals
Caryocorbula inaequalis (Say 1824)
20 individuals
original and current combination Corbula inaequalis
Caryocorbula ? cuneata (Say 1824)
2 individuals
Bivalvia - Cardiida - Veneridae
? Pitar subnasuta
39 individuals
? Pitar sp. Römer 1857
1 individual
Mercenaria sp. Schumacher 1817
1 individual
Dosinia acetabulum (Conrad 1832)
31 individuals
Callista marylandica
1 individual
? Clementia sp. Gray 1847
1 individual
Bivalvia - Cardiida - Mactridae
? Spisula sp. Gray 1837
2 individuals
Spisula subparilis (Conrad 1841)
133 individuals
Bivalvia - Cardiida - Psammobiidae
Gari gubernatoria
1 individual
Bivalvia - Cardiida - Tellinidae
Tellinidae indet. Blainville 1814
4 individuals
Bivalvia - Cardiida - Semelidae
Semele subovata (Say 1824)
3 individuals
Bivalvia - Cardiida - Cardiidae
Cerastoderma laqueatum (Conrad 1830)
20 individuals
recombined as Chesacardium laqueatum
Bivalvia - Lucinida - Lucinidae
Megaxinus anodonta (Say 1824)
2 individuals
recombined as Stewartia anodonta
Bivalvia - Carditida - Crassatellidae
Eucrassatella turgidulus (Conrad 1843)
2 individuals
recombined as Marvacrassatella turgidula
Bivalvia - Carditida - Astartidae
Astarte thisphila Glenn 1904
3 individuals
Bivalvia - Mytilida - Mytilidae
Mytilus sp. Linnaeus 1758
1 individual
Modiolus sp. (Lamarck 1801)
1 individual
Bivalvia - Pectinida - Pectinidae
Chesapecten nefrens Ward and Blackwlder 1975
17 individuals
recombined as Chesapecten (Chesapecten) nefrens
Bivalvia - Ostreida - Malleidae
Isognomon maxillata (Lamarck 1819)
2 individuals
Bivalvia - Arcida - Arcidae
Anadara staminea (Say 1832)
5 individuals
recombined as Dallarca staminea
Lingulata - Discinida - Disciniidae
Discinisca lugubris (Conrad 1834)
Malacostraca - Decapoda
Decapoda indet. Latreille 1802
Thecostraca - Balanomorpha - Balanidae
Balanus concavus Bronn 1831
290 specimens
recombined as Concavus concavus
see common names

Geography
Country:United States State/province:Maryland County:Calvert
Coordinates: 38.4° North, 76.5° West (view map)
Paleocoordinates:38.6° North, 73.6° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
Stage:Serravallian 10 m.y. bin:Cenozoic 5
Key time interval:Serravallian
Age range of interval:13.82000 - 11.63000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Choptank Member:Drumcliff
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Drumcliff Mbr of the Choptank Fm, Chesapeake Grp. AGE: Middle Miocene. STRATIGRAPHIC POSITION: From base of unit 3.
Lithology and environment
Primary lithology:fine,shelly/skeletal unlithified sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Hashy, shell-supported fine sand. LITHIFICATION: Unlithified, based on visual inspection of collection by enterer.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Shallow marine siliciclastic.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,sieve,field collection
Minimum sieve size:1.000
Reason for describing collection:taphonomic analysis
Museum repositories:YPM
Collectors:Kidwell Collection dates:1978
Collection method comments: COLLECTOR: S.K. Kidwell, 1978. REPOSITORY: Peabody Museum of Natural History, Yale University.
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda, bivalvia, and scaphopoda. NOMENCLATURE: Somewhat modern. Identifications are based on Martin (1904) for gastropods and bivalves, with revisions following subsequent publications.
Metadata
Also known as:B-544
Database number:79107
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:G. Varnham Research group:marine invertebrate
Created:2008-02-25 19:37:35 Last modified:2022-03-07 09:14:25
Access level:the public Released:2008-02-25 19:37:35
Creative Commons license:CC BY
Reference information

Primary reference:
26560. S. M. Kidwell. 1982. Stratigraphy, invertebrate taphonomy and depositional history of the Miocene Calvert and Choptank Formations, Atlantic Coastal Plain. Unpublished PhD thesis, Yale University 1-511 [A. Hendy/A. Hendy/A. Hendy]

Secondary references:

26566 J.-M. Pacaud and J. Le Renard. 1995. Révision des Mollusques Paléogénes du Bassin de Paris. IV - Liste systématique actualisée. Cossmanniana 3(4):155-187 [A. Hendy/A. Hendy]