Anzaldo Formation

The Anzaldo Formation is a Katian geologic formation of central Bolivia. The formation belongs to the Cochabamba Group, overlies the Capinota Formation and is overlain by the San Benito Formation.

Fossil content
The formation has provided the following fossils:

Fish

 * Pteraspidomorphi
 * Huemacaspis bistrami
 * Sacabambaspis janvieri

Trilobites

 * Leiostegina inexpectans

Bivalves

 * ?Grammysia sp.
 * ?Modiomorpha sp.
 * ?Parallelodon sp.
 * "Ctenodonta" sp.
 * "Goniophorina" sp.

Gastropods

 * Gyrospira tourteloti

Lingulida

 * Bistramia elegans
 * Dignomia munsterii