Parker Creek, south, Zone 12: Langhian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Testudines
Chelonia indet. (Latreille 1800)
Uhen 2007 1 specimen
synonym of Testudines
Mammalia - Cetacea
Cetacea indet. Brisson 1762
Uhen 2007
Miminiacetus pappus (Kellogg 1955)
Godfrey and Lambert 2023
recombined as Liolithax pappus
Delphinodon dividum True 1912
1 specimen
recombined as Brevirostrodelphis dividum
Zone 12 (1 measurement)
Mammalia - Cetacea - Delphinidae
Delphinidae indet. Gray 1821
Uhen 2007
Mammalia - Cetacea - Eurhinodelphinidae
Eurhinodelphis sp. Van Beneden and Gervais 1880
Uhen 2007
Rhabdosteus hruschkai n. sp. Myrick 1979
Myrick 1979
    = Schizodelphis barnesi Myrick 1979
Muizon 1988
Eurhinodelphis whitmorei n. sp. Myrick 1979
Myrick 1979 1 specimen
synonym of Xiphiacetus cristatus
Eurhinodelphis vaughni n. sp. Myrick 1979
Myrick 1979
synonym of Xiphiacetus bossi
Mammalia - Cetacea
Priscodelphinus atropius Cope 1868
Uhen 2007 1 specimen
nomen dubium belonging to Odontoceti
Mammalia - Cetacea - Squalodontidae
Squalodon murdochi Godfrey and Lambert 2023
Godfrey and Lambert 2023
Mammalia - Cetacea - Physeteridae
Orycterocetus crocodilinus Cope 1867
Kellogg 1965
base of Zone 12
Mammalia - Carnivora - Phocidae
Leptophoca sp. True 1906
Uhen 2007 2 specimens
Leptophoca lenis True 1906
Uhen 2007 1 specimen
synonym of Leptophoca proxima
Mammalia - Sirenia - Dugongidae
Metaxytherium calvertense Kellogg 1966
Uhen 2007 1 specimen
synonym of Metaxytherium crataegense
Chondrichthyes - Odontaspidida - Isuridae
Oxyrhina sp. Agassiz 1838
Uhen 2007
Chondrichthyes - Lamniformes - Otodontidae
Carcharodon megalodon (Agassiz 1835)
Uhen 2007 1 specimen
recombined as Otodus megalodon
Also studied in Pimiento and Balk
Chondrichthyes - Lamniformes - Cetorhinidae
Cetorhinus sp. de Blainville 1816
Gottfried 1995 1 specimen
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:15.98000 - 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:group of beds
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
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Preservation of anatomical detail:good
Articulated whole bodies:many
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:some
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Metadata
Database number:45506
Authorizer:M. Uhen, M. Nelson Enterer:M. Uhen, M. Nelson
Modifier:G. Varnham Research group:vertebrate
Created:2004-10-26 10:45:02 Last modified:2022-03-03 04:12:34
Access level:the public Released:2004-10-26 10:45:02
Creative Commons license:CC BY
Reference information

Primary reference:
13044. A. R. Barwick. 1939. Miocene porpoise (Delphinodon dividum) from southern Maryland. American Midland Natualist 22:154-159 [M. Uhen/M. Uhen/M. Uhen]

Secondary references:

13045 A. R. Barwick. 1940. Skull of fossil cetotherean whale, Siphonocetus priscus, from the Miocene of the Cheapeake Bay Region. American Midland Naturalist 23(3):746-750 [M. Uhen/M. Uhen/M. Uhen]
14892 L. de Verteuil and G. Norris. 1996. Dinoflagellate cyst zonation and allostratigraphy of the Chesapeake Group. Micropaleontology 42:1-25 [M. Uhen/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]
30103 M. D. Gottfried. 1995. Miocene basking sharks (Lamniformes: Cetorhinidae) from the Chesapeake Group of Maryland and Virginia. Journal of Vertebrate Paleontology 15(2):443-447 [M. Uhen/M. Uhen]
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]
11917 R. Kellogg. 1965. A new whalebone whale from the Miocene Calvert Formation. Bulletin of the United States National Museum 247(1):1-45 [M. Uhen/M. Uhen/M. Uhen]
11921 R. Kellogg. 1968. A hitherto unrecognized Calvert Cetothere. Bulletin of the United States National Museum 247(6):133-161 [M. Uhen/M. Uhen/M. Uhen]
12196 C. Muizon. 1988. Le polyphyletisme des Acrodelphidae, Odontocetes longirostres du Miocene europeen. Bulletin du Muséum National d'Histore Naturelle, Section C Sciences de la Terre, Paleontologie, Geologie, Minerologie 10:31-88 [M. Uhen/M. Uhen/M. Uhen]
15550 A. C. Myrick. 1979. Variation, taphonomy, and adaptation of the Rhabdosteidae (=Eurhinodelphidae) (Odontoceti, Mammalia) from the Calvert Formation of Maryland and Virginia. University of California, Los Angeles 1-411 [M. Uhen/M. Uhen]
49081 C. Pimiento and M. Balk. 2015. The extinct giant shark Carcharocles megalodon: A model for understanding deep-time body size trends of marine apex predators. [C. Jaramillo/C. Pimiento/C. Pimiento]
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]
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]