Suction Creek (Cretaceous of the United States)

Where: Blaine County, Montana (48.0° N, 109.0° W: paleocoordinates 54.8° N, 74.2° W)

• coordinate based on nearby landmark

When: Judith River Formation, Campanian (83.6 - 72.1 Ma)

• The fossils were found as "float" in the lower threee to five feet of the eroded exposure and also in situ in a rust-coloured sandy lens approximately four inches in thickness. The zone in general is a tan to ligth buff sandy stratified sediment.

Environment/lithology: estuary or bay; sandstone

• Sandstone with minimal iron content and no apparent volcanic residue. The site is lagoonal, with a combination of marine and fresh-water species and plesiosaur material.

Size classes: macrofossils, mesofossils

Primary reference: G. R. Case. 1978. A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica Abteilung A 160(Lfg. 1-6):176-205 [J. Kriwet/W. Glaeser/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69150: authorized by Juergen Kriwet, entered by Wolfgang Glaeser on 20.02.2007, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus montanensis n. sp. Case 1978 elasmobranch
 Rajiformes -
Protoplatyrhina renae n. gen. n. sp.
Protoplatyrhina renae n. gen. n. sp. Case 1978 guitarfish
 Sclerorhynchiformes - Sclerorhynchidae
Ischyrhiza sp. Leidy 1856 elasmobranch
Ischyrhiza mira Leidy 1856 elasmobranch
 Sclerorhynchiformes - Ptychotrygonidae
Ptychotrygon blainensis n. sp. Case 1978 elasmobranch
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
 Lamniformes - Anacoracidae
Squalicorax kaupi Agassiz 1843 crow shark
 Lamniformes - Cretoxyrhinidae
Plicatolamna arcuata Woodward 1894 mackerel shark
 Lamniformes - Odontaspididae
Odontaspis sanguinei n. sp. Case 1978 sand tiger shark
Hypotodus grandis n. sp. Case 1978 sand tiger shark
 Carchariniformes - Pseudotriakidae
Archaeotriakis rochelleae n. gen. n. sp. Case 1978 ground shark
 Orectolobiformes - Orectolobidae
Eucrossorhinus microcuspidatus n. sp. Case 1978 wobbegong
 Orectolobiformes -
Cretorectolobus olsoni n. gen. n. sp.
Cretorectolobus olsoni n. gen. n. sp. Case 1978 carpet shark
 Orectolobiformes - Hemiscylliidae
Chiloscyllium missouriensis n. sp. carpet shark
 Synechodontiformes - Palaeospinacidae
Synechodus andersoni n. sp. Case 1978 elasmobranch
Synechodus striatus n. sp. Case 1978 elasmobranch
  - Edaphodontidae
Elasmodus cf. greenoughi Agassiz 1843 chimaera
 Chimaeriformes - Callorhynchidae
Ischyodus bifurcatus plownose chimaera
Actinopteri
 Teleostei -
Teleostei indet.
teeth, bones, scales
Reptilia
 Plesiosauria -
Plesiosauria indet. plesiosaur
bones