Sierra de la Caja, Mazapil (Cretaceous to of Mexico)

Where: Zacatecas, Mexico (24.6° N, 101.6° W)

• Paleocoordinates: 28.3° N, 44.7° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Barremian to Barremian (129.4 - 113.0 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed lithostratigraphic unit. AGE: Barremian-Aptian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From unknown stratigraphic position.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

• ENVIRONMENT: Unknown.
• SPECIFIC LITHOLOGY: Unknown. LITHIFICATION: Lithified on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Bose

Collection methods: surface (in situ),

• COLLECTOR: Böse. REPOSITORY: Museo de Paleontologia del Instituto de Geologia.

Primary reference: E. Böse. 1923. Algunas faunas cretácias de Zacatecas, Durango y Guerrero. Boletín del Instituto Géologica de México 42:1-219 [A. Hendy/A. Hendy/L. Bulot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87622: authorized by Austin Hendy, entered by Austin Hendy on 21.03.2009

Creative Commons license: CC0 (CC0)

Taxonomic list

• COVERAGE: Exhaustive for ammonoidea. NOMENCLATURE: Authoritative publication, with somewha antiquated nomenclature, but with species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Desmoceratidae
Desmoceras sp.
Desmoceras sp. Zittel 1884 ammonite