Where: Morton County, North Dakota (46.6° N, 100.6° W: paleocoordinates 52.1° N, 73.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Breien Member (Hell Creek Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: mesofossils

Collected by J. Hoganson & J. Erickson in 2000

Primary reference: J. W. Hoganson and J. M. Erickson. 2005. A new species of Ischyodus (Chondrichthyes: Holocephali: Callorhynchidae) from upper Maastrichtian shallow marine facies of the Fox Hills and Hell Creek formations, Williston Basin, North Dakota, USA. Palaeontology 48(4):709-721 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 179283: authorized by Matthew Carrano, entered by Matthew Carrano on 10.06.2016

Creative Commons license: CC BY (attribution)