SMNH 63E04-001, Carrot River (Cretaceous of Canada)

Where: Saskatchewan, Canada (53.2° N, 103.5° W: paleocoordinates 55.1° N, 62.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Niobrara Formation (Colorado Group), Coniacian (89.8 - 86.3 Ma)

• Calcareous shale member. Some of the original samples contain an oyster layer, identified as "Ostrea" sp., Ostrea congesta var. bentonensis, and Inoceramus prisms. None of these are age diagnostic, although the assemblage is close to the Turonian stage. No foraminifera were found. Age assigned in paper is Coniacian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, black, calcareous shale

Size class: macrofossils

Collected by B. McCorquodale, A. Swanston; J. Storer, K. Thomas, T. Tokaryk in 1959; 1986

• Repository: Royal Saskatchewan Museum

Primary reference: E. L. Nicholls, T. T. Tokaryk, and L. V. Hills. 1990. Cretaceous marine turtles from the Western Interior Seaway of Canada. Canadian Journal of Earth Sciences 27(10):1288-1298 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 23369: authorized by John Alroy, entered by Jill Wertheim on 12.07.2002, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• fauna includes selachian, teleosts, mosasaurs, plesiosaurs, and aves
Chondrichthyes
 Hybodontiformes - Ptychodontidae
Ptychodus cf. rugosus Dixon 1850 elasmobranch
 Rajiformes - Rhinobatidae
Rhinobatos sp. Link 1790 guitarfish
 Lamniformes - Odontaspididae
"Odontaspis saskatchewanensis n. sp." = Microcarcharias saskatchewanensis, "Synodontaspis lilliae n. sp." = Microcarcharias saskatchewanensis
"Odontaspis saskatchewanensis n. sp." = Microcarcharias saskatchewanensis Case et al. 1990 sand tiger shark
"Synodontaspis lilliae n. sp." = Microcarcharias saskatchewanensis Case et al. 1990 sand tiger shark
 Lamniformes - Aquilolamnidae
Cretomanta canadensis n. sp. Case et al. 1990 mackerel shark
 Lamniformes - Cretoxyrhinidae
Cretoxyrhina mantelli Agassiz 1835 mackerel shark
 Lamniformes - Anacoracidae
Squalicorax falcatus Agassiz 1843 crow shark
 Lamniformes - Pseudoscapanorhynchidae
Cretodus sp. Sokolov 1965 mackerel shark
Reptilia
 Testudines - Protostegidae
Protostegidae indet. Cope 1873 sea turtle
genus and species indet.