Plum Point, south, Zone 12 (Miocene of the United States)

Also known as Kaufmann Camp

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)

• group of beds-level stratigraphic resolution

Environment/lithology: estuary or bay; brown, sandy claystone

• sparse molluscs, low in diversity; subtropical environment in embayment and dry onshore; area not far from shore
• brownish sandy clay

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (in situ),

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 70819: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007, edited by Evangelos Vlachos and Margot Nelson

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cetacea - Eurhinodelphinidae
Xiphiacetus bossi1 Kellogg 1925 toothed whale
 Cetacea - Squalodontidae
Squalodon sp.2 Grateloup 1840 toothed whale
 Cetacea - Delphinidae
Delphinidae indet.2 Gray 1821 dolphin
 Cetacea - Kentriodontidae
Kentriodon sp.2 Kellogg 1927 toothed whale
 Sirenia - Dugongidae
"Metaxytherium calvertense" = Metaxytherium crataegense2
"Metaxytherium calvertense" = Metaxytherium crataegense2 Simpson 1932 dugong
Reptilia
 Testudines -
"Chelonia indet." = Testudines2
"Chelonia indet." = Testudines2 Batsch 1788 turtle
 Testudines - Emydidae
Chrysemys isoni3 Weems and George 2001 painted turtle
Partial carapace and largely complete plastron of a single individual (CMM-V-8881), collected by Billy Palmer
 Testudines - Testudinidae
Hesperotestudo ducateli3 Collins and Lynn 1936 turtle
Neural element (CMM-V-8882), collected by Victor Perez
 Testudines - Cheloniidae
Procolpochelys grandaeva3 Leidy 1861 sea turtle
Neural element (USNM 358021), collected by George Fonger
Chondrichthyes
 Carcharhiniformes - Hemigaleidae
Hemipristis serra2 Agassiz 1835 ground shark
Bivalvia
 Cardiida - Veneridae
"Cytherea staminea" = Melosia staminea, "Venus mercenaria" = Mercenaria mercenaria
"Cytherea staminea" = Melosia staminea Conrad 1838 venus clam
"Venus mercenaria" = Mercenaria mercenaria Linnaeus 1758 quahog
Gastropoda
 Neogastropoda - Muricidae
Ecphora quadricostata Conrad 1830 murex snail
var umbilicata