Where: Calvert County, Maryland (38.6° N, 76.5° W: paleocoordinates 38.8° N, 73.2° W)
• coordinate estimated from map
When: Plum Point Member (Calvert Formation), Langhian (16.0 - 13.8 Ma)
• 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)
• bed-level stratigraphic resolution
Environment/lithology: estuary or bay; sandstone
Size class: macrofossils
Preservation: original phosphate
Reposited in the USNM
Collection methods: surface (in situ),
Primary reference: C. R. Eastman. 1904. Systematic Paleontology: Pisces. Maryland Geological Survey Miocene, Text 71-93 [M. Uhen/M. Uhen/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 48884: authorized by Mark Uhen, entered by Mark Uhen on 03.04.2005, edited by Margot Nelson
Creative Commons license: CC BY (attribution)
Taxonomic list
Foraminifera | |
Globoquadrina altispira4, Praeorbulina glomerosa4, Globigerina praebulloides4, Globigerinoides altiaperturus4, "Globigerinoides sicanus" = Trilobatus sicanus4
Globigerinoides altiaperturus4 Boli 1957
"Globigerinoides sicanus" = Trilobatus sicanus4 de Stefani 1950 | |
Bivalvia | |
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Chondrichthyes | |
Squatina occidentalis n. sp.
Squatina occidentalis n. sp. Eastman 1904 angel shark | |
"Galeocerdo contortus" = Physogaleus contortus8
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"Odontaspis cuspidata" = Araloselachus cuspidatus8
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Carcharias collata n. sp.
Carcharias collata n. sp. Eastman 1904 sand shark | |
"Oxyrhina desorii" = Isurus oxyrinchus, "Oxyrhina sillimani" = Isurus sillimanii, "Oxyrhina hastalis" = Carcharodon hastalis
"Oxyrhina desorii" = Isurus oxyrinchus Rafinesque 1810 mackerel shark
"Oxyrhina sillimani" = Isurus sillimanii Gibbes 1847 mackerel shark
"Oxyrhina hastalis" = Carcharodon hastalis Agassiz 1838 white shark | |
"Odontaspis elegans" = Striatolamia macrota
"Odontaspis elegans" = Striatolamia macrota Agassiz 1838 goblin shark | |
"Carcharodon megalodon" = Otodus megalodon
"Carcharodon megalodon" = Otodus megalodon Agassiz 1835 megalodon Also studied in Pimiento et al. 2010
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Mammalia | |
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Schizodelphis barnesi7, Schizodelphis sulcatus7, Schizodelphis morckhoviensis5, "Eurhinodelphis bossi" = Xiphiacetus bossi8, "Eurhinodelphis vaughni" = Xiphiacetus bossi8, Eurhinodelphis sp.8
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"Tomarctus marylandica n. sp." = Cynarctus marylandica1
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Reptilia | |
"Chelonia indet." = Testudines8
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Actinopteri | |
Ranzania sp.8 Nardo 1840 |