Governor Run, Zone 14: Serravallian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Chelonia indet. (Latreille 1800)
Uhen 2007 2 specimens
    = Kinosternidae indet.
Weems 2023
Two peripheral elements (CMM-V-2546), collected by Elma Williams Andres, probably derived from SZ 14, Plum Point Member, Calvert Formation; Kenwood Beach, Calvert County, Maryland.
Bivalvia - Cardiida - Glossidae
Isocardia fraterna Say 1824
Shattuck 1904
recombined as Glossus fraterna
Mammalia - Cetacea
Diorocetus hiatus Kellogg 1968
Uhen 2007 1 specimen
Mammalia - Cetacea - Tranatocetidae
Mesocetus siphunculus Cope 1895
Uhen 2007 1 specimen
Mammalia - Cetacea
Aglaocetus patulus Kellogg 1968
Uhen 2007 1 specimen
recombined as Atlanticetus patulus
Mammalia - Cetacea - Eurhinodelphinidae
Eurhinodelphis cristatus (Du Bus 1872)
Uhen 2007 2 specimens
recombined as Xiphiacetus cristatus
Schizodelphis barnesi (Myrick 1979)
Godfrey and Lambert 2023
Mammalia - Cetacea - Kentriodontidae
Kentriodon pernix Kellogg 1927
Godfrey and Lambert 2023
Mammalia - Cetacea
Hadrodelphis calvertense Kellogg 1966
Uhen 2007 1 specimen
Pelodelphis gracilis n. gen., n. sp. Kellogg 1955
Kellogg 1955
nomen dubium belonging to Odontoceti
Mammalia - Carnivora - Phocidae
? Leptophoca sp. True 1906
Uhen 2007
Leptophoca lenis True 1906
Uhen 2007 1 specimen
synonym of Leptophoca proxima
Reptilia - Testudines - Cheloniidae
Procolpochelys grandaeva (Leidy 1861)
Weems 2023 1 specimen
Basicranium (USNM 186969) consisting of right quadrate, right opisthotic, parts of right and left parietals, supraoccipital, basioccipital, and left exoccipital, collected by D. B. Mackie
Reptilia - Charadriiformes - Alcidae
Miocepphus mcclungi Wetmore 1940
Wijnker and Olson 2009
Reptilia - Anseriformes - Anatidae
Tadornini indet.
Alvarez and Olson 1978 1 specimen
Chondrichthyes - Lamniformes - Otodontidae
Carcharodon megalodon (Agassiz 1835)
Uhen 2007 1 specimen
recombined as Otodus megalodon
Also studied in Pimiento et al. 2010
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, 73.6° West
Basis of coordinate:estimated from map
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:Calvert Member:Calvert Beach
Regional section:Shattuck Regional bed:14
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Zones 14-16A are regarded as Serravallian in age.
Lithology and environment
Primary lithology:brown sandy claystone
Includes fossils?Y
Lithology description: brownish sandy clay
Environment:foreshore
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
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Kenwood Beach
Database number:70835
Authorizer:M. Uhen, M. Nelson, E. Vlachos Enterer:M. Uhen, M. Nelson, E. Vlachos
Modifier:G. Varnham Research group:marine invertebrate,vertebrate
Created:2007-04-09 14:28:24 Last modified:2022-03-03 05:31:33
Access level:the public Released:2007-04-09 14:28:24
Creative Commons license:CC BY
Reference information

Primary reference:
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]

Secondary references:

64823 R. Alvarez and S. L. Olson. 1978. A new merganser from the Miocene of Virginia (Aves: Anatidae). Proceedings of the Biological Society of Washington 91(2):522-532 [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]
11925 R. Kellogg. 1955. Three Miocene porpoises from the Calvert Cliffs, Maryland. Proceedings of the United States National Museum 105(3354):101-154 [M. Uhen/M. Uhen/M. Uhen]
38040 C. Pimiento, D. J. Ehret, B. J. MacFadden and G. Hubbell. 2010. Ancient Nursery Area for the Extinct Giant Shark Megalodon from the Miocene of Panama. PloS One 5(5):1-9 [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]
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]
707 R. E. Weems. 1974. Middle Miocene sea turtles (Syllomus, Procolpochelys, Psephophorus) from the Calvert Formation. Journal of Paleontology 48(2):278-303 [J. Alroy/M. Sommers/P. Holroyd]
85705 R. E. Weems. 2023. Miocene and Pliocene Chelonians from the Calvert Cliffs and Nearby Regions. In S. J. Godfrey (ed.), The Geology and Vertebrate Paleontology of Calvert Cliffs, Maryland, USA – Volume 2 Turtles and Toothed Whales 3-48 [E. Vlachos/E. Vlachos]
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]