Timber Ridge (Cretaceous of the United States)

Where: Blaine County, Montana (48.0° N, 108.9° W: paleocoordinates 54.8° N, 74.1° W)

• coordinate based on nearby landmark

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

Environment/lithology: deltaic; sandstone

• A strongly ferruginous sandstone with volcanic residue present, no marcasite, but with Sulphur crystals present in small amounts. The site represents a deltaic or near shore contact with the open sea.

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 69161: 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
Hybodus storeri 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
Ischyrhiza cf. avonicola Estes 1964 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
 Synechodontiformes - Palaeospinacidae
Synechodus andersoni n. sp. Case 1978 elasmobranch
Synechodus striatus n. sp. Case 1978 elasmobranch
 Chimaeriformes - Callorhynchidae
Ischyodus bifurcatus plownose chimaera
Actinopteri
 Teleostei -
Osteichthyes
 Caudata - Urodela
Scapherpeton sp. Cope 1876 salamander
atlas
Reptilia
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Loricata -
Sebecosuchia indet. Colbert 1946 crocodilian
Mammalia
 Theriiformes -
"Marsupialia indet." = Metatheria
"Marsupialia indet." = Metatheria Huxley 1880 marsupial
 Didelphimorphia - Alphadontidae
Alphadon cf. halleyi, "Alphadon cf. rhaister" = Turgidodon rhaister
Alphadon cf. halleyi Sahni 1972 marsupial
"Alphadon cf. rhaister" = Turgidodon rhaister Clemens 1966 marsupial