Where: Hidalgo, Mexico (20.3° N, 98.2° W: paleocoordinates 3.7° N, 47.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bucklandi ammonoid zone, Huayacocotla Formation (Huayacocotla Group), Early/Lower Sinemurian (196.5 - 189.6 Ma)

Environment/lithology: basinal (siliceous); lithified sandstone

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ)

• the collections of the Instituto de Geología of Mexico (UNAM).

Primary reference: C. Meister, J. Blau, J.-L. Dommergues, R. Schlatter, R. Schmidt-Effing and K. Burk. 2005. Ammonites from the Lower Jurassic (Sinemurian) of Tenango de Doria (Sierra Madre Oriental, Mexico). Part IV: Biostratigraphy, palaeobiogeography and taxonomic addendum. Revue de Paléobiologie 24(1):365-384 [J. Pálfy/D. Juhász]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 208368: authorized by József Pálfy, entered by Dorina Juhász on 01.04.2020

Creative Commons license: CC BY (attribution)