Locality B, southeast of Becerril (Cretaceous of Colombia)

Where: Magdalena, Colombia (9.6° N, 73.2° W: paleocoordinates 6.4° N, 42.6° W)

When: Late/Upper Aptian (122.5 - 113.0 Ma)

• The ammonite genera Dufrenoya and Cheloniceras, indicative of upper Aptian age, occur both above and below locality B, while various parahoplitid ammonites are quite abundant.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, black, carbonaceous shale

• The Cretaceous sediments in this immediate area are carbonaceous black shales with calcareous concretionsbammonites mostly in concretions, but shale too

Size class: macrofossils

Preservation: cast

Reposited in the UCMP

Primary reference: J. W. Durham. 1946. Upper Aptian Nautiloids from Colombia. Journal of Paleontology 20(5):428-434 [L. Ivany/C. Story]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 64332: authorized by Linda Ivany, entered by Cristina Story on 06.09.2006, edited by Linda Ivany

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Parahoplitidae
Parahoplitidae indet.
Parahoplitidae indet. Spath 1922 ammonite
 Nautilida - Nautilidae
Eutrephoceras laverdei n. sp.
Eutrephoceras laverdei n. sp. Durham 1946 nautiloid
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam