Barremian-Early Albian Deshayesitidae, Oppeliidae, Desmoceratidae and Silesitidae of Colombia

Forty seven species (among them fourteen new that are listed below) of the following ammonite genera of the families Deshayesitidae Stoyanow, Oppeliidae Douvillé, Desmoceratidae Zittel, and Silesitidae Hyatt are described. Neodeshayesites includes the new species N. buergli, N. striatus, N. biplicatus, N. longicostatus, N. multicostatus, N. euglyphoides and N. tuberculatus. Dufrenoyia includes the new species D. renzi. Pseudohaploceras includes the new species P. gerhardti, P. yucaense, P.? yeseraense and P. simile. Melchiorites includes the new species M. colombianus. Zuercherella includes the new species Z. etayosernai. Other species belong to the genera Juandurhamiceras, Aconeceras, Pseudosaynella, Valdedorsella, Puzosia, Carloscaceresiceras, Kennicottia and Miyakoceras.