Twin Peaks (Cretaceous of the United States)

Also known as Case Estuary Site 2:30

Where: Washaki County, Wyoming (44.1° N, 107.7° W: paleocoordinates 51.0° N, 75.6° W)

• coordinate based on nearby landmark

When: Teapot Sandstone Member (Mesaverde Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

Environment/lithology: estuary or bay; sandstone

Size classes: macrofossils, mesofossils

Primary reference: G. R. Case. 1987. A new selachian fauna from the late Campanian of Wyoming (Teapot Sandstone Member, Mesaverde Formation, Big Horn Basin). Palaeontographica Abteilung A 197(Lfg. 1-3):1-37 [J. Kriwet/W. Glaeser/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 70451: authorized by Juergen Kriwet, entered by Wolfgang Glaeser on 23.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

 Plagiostomi - Squalidae
Centrophoroides worlandensis n. sp. dogfish shark
 Hybodontiformes - Hybodontidae
Hybodus montanensis Case 1978 elasmobranch
 Hybodontiformes - Lonchidiidae
"Lissodus griffisi n. sp." = Lonchidion griffisi
"Lissodus griffisi n. sp." = Lonchidion griffisi Case 1987 elasmobranch
 Rajiformes - Rhinobatidae
Rhinobatos casieri Herman 1975 guitarfish
 Rajiformes -
Protoplatyrhina renae Case 1978 guitarfish
 Sclerorhynchiformes - Sclerorhynchidae
Ischyrhiza basinensis n. sp. elasmobranch
Ischyrhiza mira Leidy 1856 elasmobranch
Ischyrhiza avonicola Estes 1964 elasmobranch
 Sclerorhynchiformes - Ptychotrygonidae
Ptychotrygon boothi n. sp. elasmobranch
Ptychotrygon ellae n. sp. elasmobranch
Ptychotrygon greybullensis n. sp. elasmobranch
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
 Lamniformes - Anacoracidae
Squalicorax kaupi Agassiz 1843 crow shark
 Lamniformes - Mitsukurinidae
Scapanorhynchus texanus Roemer 1852 goblin shark
 Lamniformes - Cretoxyrhinidae
Plicatolamna arcuata Woodward 1894 mackerel shark
 Lamniformes - Odontaspididae
Odontaspis cheathami n. sp. sand tiger shark
Odontaspis steineri n. sp. sand tiger shark
Hypotodus grandis Case 1978 sand tiger shark
Pseudodontaspis herbsti n. gen. n. sp. sand tiger shark
 Carchariniformes - Pseudotriakidae
Archaeotriakis ornatus n. sp. ground shark
Archaeotriakis rochelleae Case 1978 ground shark
 Orectolobiformes -
Brachaelurus bighornensis n. sp. carpet shark
 Orectolobiformes - Orectolobidae
Squatirhina roessingi n. sp. Case 1987 wobbegong
 Orectolobiformes - Ginglymostomatidae
Ginglymostoma globidens Cappetta and Case 1975 nurse shark
 Orectolobiformes -
Cretorectolobus olsoni Case 1978 carpet shark
 Synechodontiformes - Palaeospinacidae
Synechodus turneri n. sp. Case 1987 elasmobranch