Woodhawk bonebed (Cretaceous to of the United States)

Where: Fergus County, Montana (47.7° N, 109.0° W: paleocoordinates 54.7° N, 75.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Woodhawk Member (Judith River Formation), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; lithology not reported

Size class: mesofossils

Collected by R. Rogers, Y. Tulu in 2002

Collection methods: quarrying, surface (float), surface (in situ),

Primary reference: Y. Tulu and R. R. Rogers. 2004. Late Cretaceous chondrichthyans from the Woodhawk bonebed, Judith River Formation (Campanian), Fergus County, Montana. Journal of Vertebrate Paleontology 24(3, suppl.):123A [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 177498: authorized by Matthew Carrano, entered by Matthew Carrano on 30.03.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus montanensis Case 1978 elasmobranch
 Rajiformes -
Protoplatyrhina renae Case 1978 guitarfish
 Sclerorhynchiformes - Sclerorhynchidae
Ischyrhiza mira Leidy 1856 elasmobranch
Ischyrhiza avonicola Estes 1964 elasmobranch
 Sclerorhynchiformes - Ptychotrygonidae
Ptychotrygon triangularis Reuss 1845 elasmobranch
 Myliobatiformes - Dasyatidae
cf. Myledaphus bipartitus Cope 1876 whiptail stingray
 Lamniformes - Anacoracidae
Squalicorax kaupi Agassiz 1843 crow shark
cf. Squalicorax kaupi Agassiz 1843 crow shark
 Lamniformes - Archaeolamnidae
Archaeolamna kopingensis Davis 1890 mackerel shark
"Archaeolamna kopingensis kopingensis"
 Lamniformes - Eoptolamnidae
Protolamna sokolovi mackerel shark
 Lamniformes - Cretoxyrhinidae
Cretolamna appendiculata Agassiz 1843 mackerel shark
 Lamniformes - Odontaspididae
Hypotodus sp. Jaekel 1895 sand tiger shark
"spp."
Hypotodus grandis Case 1978 sand tiger shark
 Orectolobiformes - Orectolobidae
Squatirhina sp. Casier 1947 wobbegong
 Orectolobiformes -
Cretorectolobus olsoni Case 1978 carpet shark
 Chimaeriformes - Callorhynchidae
Ischyodus sp. Egerton 1843 plownose chimaera