Patagonian plesiosaurs are among the first Mesozoic reptiles described in South America. However, they are scarcely known, and most of the findings are recent. They are scarce compared to the record of the Northern Hemisphere, ...

The elasmosaurid Fresnosaurus drescheri, Welles from the contact between the Tierra Loma/Marca members of the Moreno Formation (Maastrichtian), California, USA is reviewed. Most of the features included in Welles's original ...

Elasmosaurids are a cosmopolitan group of plesiosaurians that radiated during the Late Cretaceous. A new specimen of the small sized elasmosaurid Kawanectes lafquenianum is described here. New features of the basicranium ...

Elasmosaurids are a monophyletic group of cosmopolitan plesiosaurs with extremely long necks. Although abundant elasmosaurid material has been collected from the Upper Cretaceous of Antarctica, skull material is extremely ...

In the present paper we report the incomplete skeleton of an indeterminate polycotylid that includes the articulated pelvic girdle. The material was collected from the Alpha Member of the Santa Marta Formation (upper ...

La Formación Quiriquina alberga una amplia diversidad de organismos tanto de vertebrados como invertebrados. En el registro de vertebrados, se destaca la presencia del clado Plesiosauria. Los restos de plesiosaurios de ...