Patuxent River, near (Miocene of the United States)

Where: Charles County, Maryland (38.5° N, 76.7° W: paleocoordinates 38.7° N, 73.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Calvert Beach Member (Calvert Formation), Serravallian (13.8 - 11.6 Ma)

• early late Barstovian; 14.9-14.8 Ma AEO date

•Zones 14-16A are regarded as Serravallian in age.

Environment/lithology: coastal; lithology not reported

Size class: macrofossils

Preservation: original phosphate

Primary reference: S. L. Mitchill. 1818. Observations on the geology of North America. In G. Cuvier (ed.), Essay on the Theory of the Earth 319-424 [M. Uhen/M. Uhen/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 57782: authorized by Mark Uhen, entered by Mark Uhen on 02.01.2006, edited by John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
"Pecten (Pseudamusium) cerinus" = Eburneopecten cerinus6
"Pecten (Pseudamusium) cerinus" = Eburneopecten cerinus6 Conrad 1869 scallop
Gastropoda
 Sorbeoconcha - Ranellidae
Tritonium centrosum6 Cope 1867 triton
Reptilia
 Crocodylia -
"Thecachampsa sicaria n. sp." = Thecachampsa sericodon7
"Thecachampsa sicaria n. sp." = Thecachampsa sericodon7 Cope 1867 crocodilian
AMNH FARB 1321 - type
 Testudines - Pantrionychidae
Trionyx cellulosus2 Cope 1868 turtle
 Testudines - Trionychidae
Trionychidae indet.1 Gray 1825 softshell turtle
 Testudines - Cheloniidae
Chelone sp.2 Linnaeus 1758 sea turtle
Mammalia
 Placentalia -
Cetacea indet. Brisson 1762 whale
whale vertebra
 Cetacea -
"Ixacanthus spinosus" = Priscodelphinus spinosus6, "Priscodelphinus ruschenbergeri" = Tretosphys ruschenbergeri6, "Priscodelphinus gabbii" = Tretosphys gabbii6, "Priscodelphinus lacertosus" = Tretosphys lacertosus6, Rhabdosteus latiradix5, Ixacanthus coelospondylus6
"Ixacanthus spinosus" = Priscodelphinus spinosus6 Cope 1868 toothed whale
"Priscodelphinus ruschenbergeri" = Tretosphys ruschenbergeri6 Cope 1868 toothed whale
"Priscodelphinus gabbii" = Tretosphys gabbii6 Cope 1868 toothed whale
"Priscodelphinus lacertosus" = Tretosphys lacertosus6 Cope 1868 toothed whale
Rhabdosteus latiradix5 Cope 1867 toothed whale
Ixacanthus coelospondylus6 Cope 1868 toothed whale
 Cetacea - Platanistidae
Zarhachis flagellator6 Cope 1868 toothed whale
 Cetacea - Squalodontidae
Squalodon atlanticus6 Leidy 1856 toothed whale
 Cetacea -
"Ixacanthus atropius" = Priscodelphinus atropius6, "Ixacanthus conradi" = Priscodelphinus conradi6, "Ixacanthus stenus" = Priscodelphinus stenus6, Cetophis heteroclitus6, "Delphinodon leidyi" = Squalodon wymanii6
"Ixacanthus atropius" = Priscodelphinus atropius6 Cope 1868 toothed whale
"Ixacanthus conradi" = Priscodelphinus conradi6 Leidy 1852 toothed whale
"Ixacanthus stenus" = Priscodelphinus stenus6 Cope 1868 toothed whale
Cetophis heteroclitus6 Cope 1868 toothed whale
"Delphinodon leidyi" = Squalodon wymanii6 Cope 1867 toothed whale
 Artiodactyla - Tayassuidae
"Squalodon protervus" = Cynorca proterva6
"Squalodon protervus" = Cynorca proterva6 Cope 1867 peccary
Actinopteri
 Scombriformes -
"Sphyraena speciosa" = Sphyraenodus speciosus6
"Sphyraena speciosa" = Sphyraenodus speciosus6 Leidy 1856
Chondrichthyes
 Heterodontiformes - Heterodontidae
"Sphyrna prisca" = Cestracion prisca6
"Sphyrna prisca" = Cestracion prisca6 Agassiz 1843 bullhead shark
 Hexanchiformes - Hexanchidae
"Notidanus primigenius" = Notorhynchus primigenius3
"Notidanus primigenius" = Notorhynchus primigenius3 Agassiz 1835 sevengill shark
 Carcharhiniformes - Hemigaleidae
Hemipristis serra6 Agassiz 1835 ground shark
 Carcharhiniformes - Sphyrnidae
"Carcharias magna" = Sphyrna magna6, "Sphyrna magna" = Sphyrna magna4, "Carcharias laevissimus" = Sphyrna laevissima6
"Carcharias magna" = Sphyrna magna6 Cope 1868 hammerhead shark
"Sphyrna magna" = Sphyrna magna4 Cope 1868 hammerhead shark
"Carcharias laevissimus" = Sphyrna laevissima6 Cope 1867 hammerhead shark
 Carcharhiniformes - Galeocerdidae
Galeocerdo latidens6 Agassiz 1835 tiger shark
Galeocerdo aduncus6 Agassiz 1835 tiger shark
 Carcharhiniformes - Carcharhinidae
"Galeocerdo contortus" = Physogaleus contortus6, "Carcharias (Prionodon) egertoni" = Prionodon egertoni6, "Galeocerdo triqueter" = Physodon triqueter6
"Galeocerdo contortus" = Physogaleus contortus6 Gibbes 1847 requiem shark
"Carcharias (Prionodon) egertoni" = Prionodon egertoni6 Agassiz 1843 blue shark
"Galeocerdo triqueter" = Physodon triqueter6 Eastman 1904 requiem shark
 Lamniformes - Lamnidae
"Oxyrhina desorii" = Isurus oxyrinchus6, "Oxyrhina hastalis" = Carcharodon hastalis6
"Oxyrhina desorii" = Isurus oxyrinchus6 Rafinesque 1810 mackerel shark
"Oxyrhina hastalis" = Carcharodon hastalis6 Agassiz 1838 white shark
 Lamniformes - Odontaspididae
"Odontaspis cuspidata" = Araloselachus cuspidatus6
"Odontaspis cuspidata" = Araloselachus cuspidatus6 Agassiz 1843 sand tiger shark
 Lamniformes - Otodontidae
Otodus obliquus6, "Carcharodon megalodon" = Otodus megalodon6
Otodus obliquus6 Agassiz 1838 mackerel shark
"Carcharodon megalodon" = Otodus megalodon6 Agassiz 1835 megalodon
 Lamniformes - Carchariidae
Carcharias collata6 Eastman 1904 sand shark
 Myliobatiformes - Dasyatidae
"Raja dux" = Trygon dux3
"Raja dux" = Trygon dux3 Cope 1867 whiptail stingray
 Myliobatiformes - Myliobatidae
Myliobatis frangens n. sp.3 Eastman 1904 eagle ray
Myliobatis gigas3 Cope 1868 eagle ray
Myliobatis pachyodon3 Cope 1868 eagle ray
 Myliobatiformes - Aetobatidae
"Aetobatis arcuatus" = Aetobatus irregularis6
"Aetobatis arcuatus" = Aetobatus irregularis6 Agassiz 1843 stingray