Cerro Barcino Formation

Tyrannotitan (; ) is a genus of large theropod dinosaur belonging to the carcharodontosaurid family. It is known from a single species, T. chubutensis, which lived during the Albian stage of the Early Cretaceous period in what is now Argentina. Tyrannotitan is considered to share a close relationship with other prominent South American carcharodontosaurids such as Giganotosaurus and Mapusaurus. Unlike its relatives, it was bulkier and more robust. This taxon is known from two specimens, both of which are highly incomplete.

Patagotitan is a genus of titanosaurian sauropod dinosaur from the Early Cretaceous (Albian stage) Cerro Barcino Formation in Chubut Province, Patagonia, Argentina. The genus contains a single species known from at least six young adult individuals, Patagotitan mayorum, which was first announced in 2014 and then named in 2017 by José Carballido and colleagues. Originally thought to be the largest known titanosaur and land animal overall, preliminary studies and press releases suggested that Patagotitan had an estimated length of and an estimated weight of . Later research revised the length es

Genyodectes ("jaw bite", from the Greek words genys ("jaw") and dektes ("bite")) is a genus of ceratosaurian theropod dinosaur from the Lower Cretaceous (Aptian) of South America. The holotype material (MLP 26–39, Museo de La Plata, La Plata, Argentina) was collected from the Cerro Barcino Formation, Cañadón Grande, Departamento Paso de Indios in the Chubut Province of Argentina and consists of an incomplete snout, including the premaxillae, portions of both maxillas, the right and left dentary, many teeth, a fragment of the left splenial, and parts of the supradentaries. These elements are ge

Chubutisaurus (meaning "Chubut lizard") is a genus of somphospondylan sauropod dinosaur from the Late Cretaceous (Cenomanian) Cerro Barcino Formation of Argentina. The type species, Chubutisaurus insignis, was described by del Corro in 1975. Chubutisaurus had a more robust radius than Venenosaurus. In 2010 Gregory S. Paul gave a length of and a weight of . Thomas Holtz estimated its length at in 2012.

Priosphenodon is an extinct, large herbivorous eilenodontine rhynchocephalian known from the mid-Cretaceous (Albian-Turonian) of Argentina. It is one of the largest known sphenodontians.