Third and Fourth Streets (Miocene of the United States)

Where: Richmond County, Virginia (37.5° N, 77.4° W: paleocoordinates 37.7° N, 74.6° W)

• coordinate estimated from map

When: Calvert Formation (Chesapeake Group), Serravallian (13.8 - 11.6 Ma)

• age after Andrews, 1986

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; sandstone

Size class: macrofossils

Preservation: original phosphate

Primary reference: J. Leidy. 1869. The extinct mammalian fauna of Dakota and Nebraska, including an account of some allied forms from other localities, together with a synopsis of the mammalian remains of North America. Journal of the Academy of Natural Sciences, Philadelphia 2:1-472 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 57114: authorized by Mark Uhen, entered by Mark Uhen on 02.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Labriformes - Labridae
Protautoga conidens1 Leidy 1873
This specimen is from the City of Richmond, but it is unclear where within the city.
Mammalia
 Carnivora - Phocidae
Phocidae indet.2 Gray 1821 seal
 Cetacea - Squalodelphinidae
Phocageneus venustus n. gen. n. sp.
Phocageneus venustus n. gen. n. sp. Leidy 1869 toothed whale
This specimen is from the City of Richmond, but it is unclear where within the city.
Chondrichthyes
 Hexanchiformes - Hexanchidae
"Notidanus primigenius" = Notorhynchus primigenius1
"Notidanus primigenius" = Notorhynchus primigenius1 Agassiz 1835 sevengill shark
This specimen is from the City of Richmond, but it is unclear where within the city.
 Carcharhiniformes - Hemigaleidae
Hemipristis serra1 Agassiz 1835 ground shark
This specimen is from the City of Richmond, but it is unclear where within the city.
 Lamniformes - Lamnidae
"Oxyrhina hastalis" = Carcharodon hastalis1
"Oxyrhina hastalis" = Carcharodon hastalis1 Agassiz 1838 white shark
This specimen is from the City of Richmond, but it is unclear where within the city.