Where: Manitoba, Canada (49.2° N, 98.1° W: paleocoordinates 51.4° N, 59.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Santonian (86.3 - 83.6 Ma)

• "We were unable to determine the exact stratigraphic level of the ROM specimen within the formation; however, the chalky matrix and the geographical location, as well as the preservation of the bones, suggests that the specimen is likely from the Chalky Member, which is the upper half of the formation. The estimated age for the ROM specimen, based on this assumption, is Santonian to the earliest Campanian (McNeil and Caldwell, 1981)."

• bed-level stratigraphic resolution

Environment/lithology: marine; gray mudstone

Size class: macrofossils

Collected in 1974; reposited in the ROM

Primary reference: T. Sato, X.-C. Wu, A. Tirabasso and P. Bloskie. 2011. Braincase of a polycotylid plesiosaur (Reptilia: Sauropterygia) from the Upper Cretaceous of Manitoba, Canada. Journal of Vertebrate Paleontology 31(2):313-329 [M. Carrano/H. Street/H. Street]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 107803: authorized by Matthew Carrano, entered by Hallie Street on 16.04.2011

Creative Commons license: CC BY (attribution)