Ojinaga Formation

The Ojinaga Formation is a Mesozoic geologic formation. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.

Vertebrate paleofauna

 * Tylosaurus cf. (kansasensis) nepaeolicus

Invertebrate paleofauna

 * Inoceramus sp.
 * Globochaete alpina
 * Favusella iltermanne
 * Hedbergella sp.
 * Sacoccoma sp.
 * Rotalipora sp.
 * Heterohelix sp.
 * Leoblichaella cf. bentonensis
 * Clavihedbergella sp.
 * Mammites nodosides
 * Collignomiceras chispaense
 * Pryonocycloceras gabrielensis
 * Texanites stangeri
 * Texanites densicostatus
 * Submortoniceras tequesquitense
 * Inoceramus undulatuplicatus
 * Placenticeras planum
 * Eutrephoceras dekayi
 * Eutrephoceras alcesense
 * Baculites sp.
 * Exogyra poderosa
 * Exogyra erraticostata