Where: Nevada (39.1° N, 114.3° W: paleocoordinates 8.5° N, 39.8° W)

When: Acrochordiceras hyatti ammonoid zone, Bithynian (247.2 - 242.0 Ma)

• Hadleyi subzone (Taylori zone in Bucher, 1988 but Hyatti zone in Bucher, 1992)

Environment/lithology: marine; lithified, carbonaceous siliciclastic sediments

Size class: macrofossils

Reposited in the USNM

Primary reference: H. Bucher. 1988. A new Middle Anisian (Middle Triassic) ammonoid zone from northwestern Nevada. Eclogae Geologicae Helvetiae 81(3):723-762 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 107493: authorized by Matthew Clapham, entered by Matthew Clapham on 09.04.2011, edited by Christina Feng

Creative Commons license: CC BY (attribution)