Chesapeake Beach, south of, Zone 10: Langhian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Cetacea - Squalodontidae
Squalodon sp. Grateloup 1840
1 specimen
Mammalia - Cetacea - Physeteridae
Orycterocetus crocodilinus Cope 1867
Kellogg 1965 1 specimen
near top of zone 9
Mammalia - Cetacea - Eurhinodelphinidae
Rhabdosteus longirostris (Du Bus 1867)
Uhen 2007 1 specimen
original and current combination Eurhinodelphis longirostris
Chondrichthyes - Carcharhiniformes - Galeocerdidae
Galeocerdo aduncus (Agassiz 1835)
Uhen 2007 3 elements
Chondrichthyes - Carcharhiniformes - Hemigaleidae
Hemipristis serra Agassiz 1835
Uhen 2007 4 elements
Chondrichthyes - Lamniformes - Otodontidae
Carcharodon megalodon (Agassiz 1835)
Uhen 2007 2 elements
recombined as Otodus megalodon
Chondrichthyes - Lamniformes - Lamnidae
Isurus sp. Rafinesque 1810
Uhen 2007 3 elements
Chondrichthyes - Heterodontiformes - Heterodontidae
Sphyrna prisca Agassiz 1843
Uhen 2007 1 element
recombined as Cestracion prisca
Gastropoda - Turritellidae
Turritella plebeia Say 1824
Ward 1992
recombined as Mariacolpus plebeia
subspecies plebeia
Turritella indentata
Shattuck 1904
Turritella exaltata Conrad 1841
Ward 1992
Turritella indenta Conrad 1841
Ward 1992
Gastropoda - Neogastropoda - Muricidae
Ecphora tricostata Martin 1904
Ward 1992
subspecies pamlico and tricostata
Bivalvia - Pectinida - Pectinidae
Chesapecten coccymeus
Ward 1992
Pecten madisonius Conrad 1840
Shattuck 1904
replaced by Chesapecten (Chesapecten) nefrens
Pecten humphreysii Conrad 1842
Ward 1992
Eburneopecten cerinus (Conrad 1869)
Ward 1992
Bivalvia - Ostreida - Malleidae
Isognomon (Hippochaeta) sp. Lightfoot 1786
Ward 1992
Bivalvia - Ostreida - Pinnidae
Atrina harrisii Dall 1898
Shattuck 1904
Bivalvia - Ostreida - Ostreidae
Ostrea sellaeformis Conrad 1832
Shattuck 1904
    = Ostreidae indet. Rafinesque 1815
Bouchet et al. 2005
Ostrea sellaeformis (=Cubitostrea sellaeformis) is from the Middle Eocene
Bivalvia - Ostreida - Gryphaeidae
Pycnodonte percrassa (Conrad 1840)
Ward 1992
Hyotissa haitensis (Sowerby 1850)
Ward 1992
Bivalvia - Arcida - Arcidae
Arca subrostrata Conrad 1841
Shattuck 1904
recombined as Dallarca subrostrata
Bivalvia - Arcida - Glycymerididae
Glycimeris parilis
Shattuck 1904
    = Glycymeris parilis Conrad 1843
Hendy et al. 2008
Bivalvia - Cardiida - Cardiidae
Chesacardium craticuloides (Conrad 1845)
Ward 1992
Bivalvia - Cardiida - Ungulinidae
Timothynus subvexa (Conrad 1833)
Ward 1992
Bivalvia - Cardiida - Glossidae
Glossus markoei (Conrad 1842)
Ward 1992
Glossus mazlea (Glenn 1904)
Ward 1992
Bivalvia - Cardiida - Veneridae
Dosinia acetabulum (Conrad 1832)
Ward 1992
subspecies blackwelderi
Mercenaria blakei Ward 1992
Ward 1992
Melosia staminea (Conrad 1838)
Ward 1992
Macrocallista marylandica (Conrad 1833)
Shattuck 1904
Bivalvia - Pholadida - Corbulidae
Bicorbula idonea (Conrad 1833)
Ward 1992
Varicorbula elevata (Conrad 1838)
Ward 1992
Bivalvia - Hiatellida - Hiatellidae
Panopea americana (Conrad 1838)
Ward 1992
Panopea goldfussii Wagner 1839
Ward 1992
Panopea whitfieldi Dall 1898
Ward 1992
Bivalvia - Lucinida - Lucinidae
Lucinoma contracta (Say 1824)
Ward 1992
Stewartia foremani (Conrad 1841)
Ward 1992
Phacoides anodonta (Say 1824)
Shattuck 1904
recombined as Stewartia anodonta
Stewartia anodonta (Say 1824)
Ward 1992
Bivalvia - Carditida - Crassatellidae
Crassatellites melinus
Shattuck 1904
synonym of Crassatella
Marvacrassatella melina (Conrad 1832)
Ward 1992
Bivalvia - Carditida - Astartidae
Astarte cuneiformis Conrad 1840
Shattuck 1904
see common names

Geography
Country:United States State/province:Maryland County:Calvert
Coordinates: 38.7° North, 76.5° West (view map)
Paleocoordinates:38.9° North, 73.2° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
Stage:Langhian 10 m.y. bin:Cenozoic 5
Key time interval:Langhian
Age range of interval:15.98000 - 13.82000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Calvert Member:Plum Point
Regional section:Shattuck Regional bed:10
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Zone 10, Kellogg 1923
Lithology and environment
Primary lithology: sandy claystone
Includes fossils?Y
Lithology description: no lithological description given
Environment:marine indet.
Geology comments: quiet water, soft bottom; variable to high amounts and diversity of molluscs; embayment
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Preservation of anatomical detail:good
Articulated whole bodies:all
Collection methods and comments
Collection methods:surface (float),field collection
Collection size:1 specimens
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collection method comments: collected from a block of sediment apparently fallen from the cliff from Zone 10
Metadata
Database number:55517
Authorizer:M. Uhen, A. Hendy Enterer:M. Uhen, A. Hendy
Modifier:G. Varnham Research group:marine invertebrate,vertebrate
Created:2005-10-28 07:00:01 Last modified:2022-03-03 04:14:20
Access level:the public Released:2005-10-28 07:00:01
Creative Commons license:CC BY
Reference information

Primary reference:
6031. R. Kellogg. 1923. Description of two squalodonts recently discovered in the Calvert Cliffs, Maryland; and notes on the shark-toothed cetaceans. Proceedings of the U. S. National Museum 62(16):1-69 [M. Uhen/M. Uhen/M. Uhen]

Secondary references:

14945 P. Bouchet, J.-P. Rocroi, J. Frýda, B. Hausdorf, W. Ponder, A. Valdes, and A. Warén. 2005. A nomenclator and classification of gastropod family-group names. Malacologia 47(1-2):1-368 [P. Wagner/P. Wagner]
19909 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]
15352 R. Kellogg. 1965. The Miocene Calvert sperm whale Orycterocetus. Bullten of the United States National Museum 247(2):47-63 [M. Uhen/M. Uhen]
23697 G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen]
24251 M. D. Uhen. 2007. USNM Chesapeake Group Cetacean Collection Data. [M. Uhen/M. Uhen]
16985 L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2 [A. Miller/A. Hendy]
32709 L. W. Ward and G. W. Andrews. 2008. Stratigraphy of the Calvert, Choptank, and St. Marys Formations (Miocene) in the Chesapeake Bay Area, Maryland and Virginia. Virginia Museum of Natural History Memoir 1-169 [M. Uhen/M. Uhen]