Big Bend of the Missouri (Cretaceous of the United States)

Also known as SDSM locality V-9837; Globidens schurmanni type locality

Where: Buffalo County, South Dakota (44.2° N, 99.7° W: paleocoordinates 49.2° N, 67.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: DeGrey Member (Pierre Shale Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• Uppermost DeGrey Formation of the Pierre Shale Group, 14.5 m above the top of the Crow Creek Member of the DeGrey Formation of the Pierre Shale

• member-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Reposited in the SDSM

Primary reference: J. E. Martin. 2007. A new species of the durophagous mosasaur Globidens (Squamata: Mosasauridae) from the Late Cretaceous Pierre Shale Group of central South Dakota, USA. Geological Society of America Special Paper 427:177-198 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123582: authorized by Philip Mannion, entered by Philip Mannion on 26.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Bivalvia
 Myalinida - Inoceramidae
Inoceramidae indet. Giebel 1852 clam
Three taxa represented: a "coarse-ribbed genus", a "fine-ribbed genus" and a "thin, flat-shelled genus": stomach contents of Globidens schurmanni
"cf. Inoceramus tenuilineatus" = Inoceramus (Cataceramus) tenuilineatus Hall and Meek 1855 clam
Stomach contents of Globidens schurmanni
 Pectinida - Anomiidae
Anomia sp. Linnaeus 1758 jingle
Stomach contents of Globidens schurmanni
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
Stomach contents of Globidens schurmanni
Gastropoda
 Basommatophora - Siphonariidae
Anisomyon sp. Meek and Hayden 1860 pulmonate
Cephalopoda
 Ammonitida - Baculitidae
Baculites compressus Say 1920 ammonite
Chondrichthyes
 Plagiostomi - Squalidae
Squalus sp. Linnaeus 1758 dogfish shark
Teeth
Reptilia
 Squamata - Mosasauridae
Globidens schurmanni n. sp. Martin 2007 mosasaur
SDSM 74764 - type (partial anterior skeleton, including cranium, jaws, cervical and trunk vertebrae partially articulated, pectoral girdles, partial anterior paddle, isolated humerus and ulna, and isolated caudal vertebrae)