Plum Point, south, Zone 10: Langhian, Maryland
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Globigerinidae
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Globoquadrina altispira
(Cushman and Jarvis 1936)
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Gibson 1983 | |||||||||
recombined as Dentoglobigerina altispira | ||||||||||
subspecies altispira | ||||||||||
Globigerinoides altiaperturus
Boli 1957
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Gibson 1983 | |||||||||
Globigerinoides sicanus
de Stefani 1950
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Gibson 1983 | |||||||||
recombined as Trilobatus sicanus | ||||||||||
Praeorbulina glomerosa
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Gibson 1983 | |||||||||
Globigerina praebulloides
Blow 1959
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Gibson 1983 | |||||||||
subspecies pseudociperoensis | ||||||||||
Bivalvia
- Carditida
- Astartidae
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Astarte cuneiformis
Conrad 1840
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Uhen 2007 | 1 specimen | ||||||||
Reptilia
- Testudines
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Chelonia indet.
(Latreille 1800)
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Uhen 2007 | |||||||||
synonym of Testudines | ||||||||||
Mammalia
- Sirenia
- Dugongidae
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? Nanosiren sp.
Domning and Aguilera 2008
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Domning and Aguilera 2008 | |||||||||
Metaxytherium calvertense n. sp.
Kellogg 1966
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Kellogg 1966 | 2 specimens | ||||||||
synonym of Metaxytherium crataegense | ||||||||||
Mammalia
- Carnivora
- Amphicyonidae
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Amphicyon sp.
Lartet 1836
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Uhen 2007 | 1 specimen | ||||||||
Mammalia
- Carnivora
- Canidae
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Tomarctus marylandica n. sp.
Berry 1938
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Berry 1938 | 1 specimen | ||||||||
recombined as Cynarctus marylandica | ||||||||||
Mammalia
- Perissodactyla
- Equidae
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Archaeohippus sp.
Gidley 1906
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Gazin and Collins 1950 | 1 specimen | ||||||||
Mammalia
- Cetacea
- Platanistidae
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Zarhachis sp.
Cope 1868
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Uhen 2007 | 1 specimen | ||||||||
Mammalia
- Cetacea
- Kentriodontidae
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Kentriodon pernix
Kellogg 1927
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Uhen 2007 | 1 specimen | ||||||||
Mammalia
- Cetacea
- Eurhinodelphinidae
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Eurhinodelphis sp.
Van Beneden and Gervais 1880
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Uhen 2007 | |||||||||
Rhabdosteus hruschkai
Myrick 1979
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Myrick 1979 | |||||||||
= Schizodelphis barnesi
Myrick 1979
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Muizon 1988 | |||||||||
Schizodelphis morckhoviensis
(Du Bus 1872)
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Godfrey and Lambert 2023 | |||||||||
Rhabdosteus longirsotris
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Myrick 1979 | 1 specimen | ||||||||
= Schizodelphis sulcatus
Gervais 1853
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Muizon 1988 | |||||||||
Eurhinodelphis bossi
Kellogg 1925
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Uhen 2007 | 1 specimen | ||||||||
recombined as Xiphiacetus bossi | ||||||||||
Eurhinodelphis vaughni
Myrick 1979
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Uhen 2007 | 1 specimen | ||||||||
synonym of Xiphiacetus bossi | ||||||||||
Mammalia
- Cetacea
- Physeteridae
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Physeterula sp.
Van Beneden 1877
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Uhen 2007 | 1 specimen | ||||||||
Orycterocetus crocodilinus
Cope 1867
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Uhen 2007 | 1 specimen | ||||||||
Mammalia
- Cetacea
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Siphonocetus priscus
(Leidy 1851)
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Uhen 2007 | 3 specimens | ||||||||
nomen dubium belonging to Siphonocetes | ||||||||||
Parietobalaena palmeri
Kellogg 1924
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Uhen 2007 | 3 specimens | ||||||||
Mammalia
- Tayassuidae
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Desmathyus sp.
Matthew 1907
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Uhen 2007 | 1 specimen | ||||||||
Actinopteri
- Tetraodontiformes
- Molidae
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Ranzania sp.
Nardo 1840
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Uhen 2007 | 1 element | ||||||||
Chondrichthyes
- Squatinidae
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Squatina occidentalis n. sp.
Eastman 1904
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Chondrichthyes
- Carcharhiniformes
- Hemigaleidae
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Hemipristis serra
Agassiz 1835
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Uhen 2007 | 1 element | ||||||||
Chondrichthyes
- Carcharhiniformes
- Carcharhinidae
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Galeocerdo contortus
Gibbes 1847
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Uhen 2007 | 5 elements | ||||||||
recombined as Physogaleus contortus | ||||||||||
Chondrichthyes
- Lamniformes
- Lamnidae
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Oxyrhina desorii
Agassiz 1843
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synonym of Isurus oxyrinchus | ||||||||||
Oxyrhina sillimani
Gibbes 1847
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recombined as Isurus sillimanii | ||||||||||
Oxyrhina hastalis
Agassiz 1838
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recombined as Carcharodon hastalis | ||||||||||
Chondrichthyes
- Lamniformes
- Odontaspididae
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Odontaspis cuspidata
(Agassiz 1843)
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Uhen 2007 | 3 elements | ||||||||
recombined as Araloselachus cuspidatus | ||||||||||
Chondrichthyes
- Lamniformes
- Mitsukurinidae
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Odontaspis elegans
(Agassiz 1838)
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synonym of Otodus macrotus | ||||||||||
Chondrichthyes
- Lamniformes
- Otodontidae
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Carcharodon megalodon
(Agassiz 1835)
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recombined as Otodus megalodon | ||||||||||
Also studied in Pimiento et al. 2010 | ||||||||||
Chondrichthyes
- Lamniformes
- Carchariidae
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Carcharias collata n. sp.
Eastman 1904
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see common names |
Geography
Country: | United States | State/province: | Maryland | County: | Calvert |
Coordinates: | 38.6° North, 76.5° West (view map) | ||||
Paleocoordinates: | 38.8° 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: | 10 | ||
Regional order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Strontium dating indicates the age of bed 10 to be 16.2–15.8 Ma, or possibly somewhat older (16.4 Ma) [48, 49]. (Marx & Fordyce, 2015) |
Lithology and environment
Primary lithology: | sandstone |
Includes fossils? | Y |
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
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Taphonomy
Modes of preservation: | body,original phosphate |
Size of fossils: | macrofossils |
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: | 48884 | ||
Authorizer: | M. Uhen, M. Nelson | Enterer: | M. Uhen, M. Nelson |
Modifier: | G. Varnham | Research group: | vertebrate |
Created: | 2005-04-03 12:10:28 | Last modified: | 2022-03-03 04:13:49 |
Access level: | the public | Released: | 2005-04-03 12:10:28 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
17219. | C. R. Eastman. 1904. Systematic Paleontology: Pisces. Maryland Geological Survey Miocene, Text 71-93 [M. Uhen/M. Uhen/M. Uhen] |
Secondary references:
13047 | C. T. Berry. 1938. A Miocene dog from Maryland. Proceedings of the United States National Museum 85(3035):159-161 [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] | |
27454 | D. P. Domning and O. A. Aguilera. 2008. Fossil Sirenia of the West Atlantic and Caribbeaan Region. VIII. Nanosiren garciae, gen. et sp. nov. and Nanosiren sanchezi, sp. nov. Journal of Vertebrate Paleontology 28(2):479-500 [M. Uhen/M. Uhen] | |
13413 | C. L. Gazin and R. L. Collins. 1950. Remains of land mammals from the Miocene of the Miocene of the Chesapeake Bay Region. Smithsonian Miscellaneous Collections 116(2):1-21 [M. Uhen/M. Uhen/M. Uhen] | |
17886 | T. G. Gibson. 1983. Key foraminifera from upper Oligocene to lower Pleistocene strata of the central Atlantic coastal plain. Smithsonian Contributions to Paleobiology 53:355-453 [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] | |
14028 | R. Kellogg. 1966. New Species of Extinct Miocene Sirenia. United States National Museum Bulletin 247(3):65-98 [M. Uhen/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] | |
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] | |
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] | |
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] |