Where: Nevada County, Arkansas (33.9° N, 93.5° W: paleocoordinates 35.7° N, 61.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Brownstown Formation, Early/Lower Santonian (85.8 - 83.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: D. A. Russell. 1964. The Skull of American Mosasaurs 1-386 [M. Carrano/H. Street] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 107639: authorized by Matt Carrano, entered by Hallie Street on 12.04.2011