Where: Nigeria (10.9° N, 11.4° E: paleocoordinates 5.4° S, 3.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nigericeras gadeni ammonoid zone, Gongila Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• Gadeni horizon (middle part of Gadeni zone)

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified limestone

Size class: macrofossils

Collection methods: Repository: Muséum d'Histoire naturelle de Genève

Primary reference: C. Meister. 1989. Les ammonites du Crétacé supérieur d'Ashaka, Nigéria: analyse taxonomique, ontogénétique, biostratigraphique et évolutive. Bulletin des Centres de Recherches Elf Exploration-Production Elf-Aquitaine 13:1-84 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175526: authorized by Matthew Clapham, entered by Matthew Clapham on 13.12.2015

Creative Commons license: CC BY (attribution)