Where: Nevada (40.5° N, 118.1° W: paleocoordinates 11.1° N, 41.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Acrochordiceras hyatti ammonoid zone, Fossil Hill Member (Prida Formation), Bithynian (247.2 - 242.0 Ma)

• This small lot encompasses ammonoids of middle Anisian as well as upper Anisian age and was not obtained by bedrock-controlled sampling. This age assignment is revealed by the small ammonoids preserved in the embedding matrix. These are unambiguously referred to Intornites mctaggarti (McLEARN) and to Platycuccoceras bonaevistae (HYATT & SMITH) which permit a Mctaggarti Subzone allocation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified limestone and lithified siltstone

Size class: macrofossils

Collected by F.N. Johnson in 1931; reposited in the USNM

• Repository: Formerly Stanford University, now USNM (Gymnites tozeri specimen and associated matrix ammonoids Intornites and Platycuccoceras)

Primary reference: H. Bucher. 1992. Ammonoids of the Hyatti Zone and the Anisian transgression in the Star Peak Group, Northwestern Nevada, USA. Palaeontographica Abteilung A 233:137-166 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132700: authorized by Matthew Clapham, entered by Matthew Clapham on 25.08.2012

Creative Commons license: CC BY (attribution)