Parker Creek, north, Zone 12: Langhian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Veneridae
Cytherea staminea Conrad 1838
recombined as Melosia staminea
Venus mercenaria Linnaeus 1758
recombined as Mercenaria mercenaria
Gastropoda - Neogastropoda - Muricidae
Ecphora quadricostata (Conrad 1830)
var. umbilicata
Reptilia - Charadriiformes - Alcidae
Miocepphus mcclungi Wetmore 1940
Wetmore 1943
Mammalia - Carnivora - Phocidae
? Leptophoca sp. True 1906
Uhen 2007 1 specimen
Leptophoca amphiatlantica n. sp. Koretsky et al. 2012
Koretsky et al. 2012 1 specimen
    = Leptophoca cf. proxima Van Beneden 1876
Dewaele et al. 2017
Leptophoca lenis True 1906
Koretsky 2001
synonym of Leptophoca proxima
Mammalia - Cetacea - Platanistidae
Pomatodelphis sp. Allen 1921
Godfrey and Lambert 2023
Schizodelphis crassangulum (Case 1904)
Uhen 2007 1 specimen
recombined as Zarhachis crassangulum
Mammalia - Cetacea - Eurhinodelphinidae
Eurhinodelphis sp. Van Beneden and Gervais 1880
Uhen 2007 1 specimen
Schizodelphis morckhoviensis (Du Bus 1872)
Godfrey and Lambert 2023
Mammalia - Cetacea
Parietobalaena palmeri Kellogg 1924
Uhen 2007 1 specimen
Chondrichthyes - Carcharhiniformes - Hemigaleidae
Hemipristis serra Agassiz 1835
Uhen 2007 1 specimen
Chondrichthyes - Lamniformes - Alopiidae
Alopias palatasi n. sp. Kent 2018
Kent 2018
see common names

Geography
Country:United States State/province:Maryland County:Calvert
Coordinates: 38.5° North, 76.5° West (view map)
Paleocoordinates:38.7° North, 73.2° West
Basis of coordinate:estimated from map
Time
Period:Neogene Epoch:Miocene
Stage:Langhian 10 m.y. bin:Cenozoic 5
Key time interval:Langhian
Age range of interval:15.97000 - 13.82000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Calvert Member:Plum Point
Regional section:Shattuck Regional bed:12
Regional order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology:brown sandy claystone
Includes fossils?Y
Lithology description: brownish sandy clay
Environment:estuary/bay
Geology comments: sparse molluscs, low in diversity; subtropical environment in embayment and dry onshore; area not far from shore, bay, short-term eustatic transgression events, long-term regression trend
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Associated major elements:all
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Metadata
Also known as:south of Dares Wharf
Database number:70823
Authorizer:M. Uhen, M. Nelson Enterer:M. Uhen, M. Nelson
Modifier:B. Shipps Research group:marine invertebrate,vertebrate
Created:2007-04-09 13:50:23 Last modified:2017-02-26 14:56:22
Access level:the public Released:2007-04-09 13:50:23
Creative Commons license:CC BY
Reference information

Primary reference:

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]

Secondary references:

61790 L. Dewaele, O. Lambert, and S. Louwye. 2017. On Prophoca and Leptophoca (Pinnipedia, Phocidae) from the Miocene of the North Atlantic realm: redescription, phylogenetic affinities and paleobiogeographic implications. PeerJ 5:e3024 [M. Uhen/M. Uhen]
85660 S. J. Godfrey and O. Lambert. 2023. Miocene Toothed Whales (Odontoceti) from Calvert Cliffs, Atlantic Coastal Plain, USA. Smithsonian Contributions to Paleobiology 107:29-186 [M. Uhen/M. Uhen]
23873 B. W. Kent. 2018. The Cartilaginous Fishes (Chimaeras, Sharks, and Rays) of Calvert Cliffs, Maryland, USA. In S. J. Godfrey (ed.), Smithsonian Contributions to Paleobiology 100:45-160 [J. Alroy/J. Alroy/M. Uhen]
17253 I. Koretsky. 2001. Morphology and systematics of Miocene Phocinae (Mammalia: Carnivora) from Paratethys and the North Atlantic region. Geologica Hungarica Series Palaeontologica 54:1-109 [M. Uhen/M. Uhen]
39675 I. A. Koretsky, C. E. Ray, and N. Peters. 2012. A new species of Leptophoca (Carnivora, Phocidae, Phocinae) from both sides of the North Atlantic Ocean (Miocene seals of the Netherlands, part I). Deinsea 15:1-12 [M. Uhen/M. Uhen]
55050 F. G. Marx and R. E. Fordyce. 2015. Baleen boom and bust: a synthesis of mysticete phylogeny, diversity and disparity. Royal Society Open Science 2:140434 [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]
32711 A. Wetmore. 1943. A second specimen of the fossil guillemot, Miocepphus. The Auk 60(4):604 [M. Uhen/M. Uhen]
29991 E. Wijnker and S. L. Olson. 2009. A revision of the fossil genus Miocepphus and other Miocene Alcidae (Aves: Charadriiformes) of the western North Atlantic Ocean. Journal of Systematic Palaeontology 7(4):471-487 [M. Uhen/M. Uhen/M. Uhen]