Bravasaurus
Bravasaurus (meaning Laguna Brava lizard) is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Ciénaga del Río Huaco Formation of La Rioja, Argentina. It contains one species, Bravasaurus arreirosorum. Etymology. The generic name "Bravasaurus" is derived from the Laguna Brava National Park in Argentina. The specific name refers to the people, the "arreiros" or drivers in Spanish, who carried cattle through the Andes in the 19th century. Description. "Bravasaurus" was roughly long. It is known from the holotype CRILAR-Pv 612, which consists of the right quadrate and quadratojugal, four cervical, five dorsal, and three caudal vertebrae , few dorsal ribs, three haemal arches, the left humerus, a fragmentary ulna, the metacarpal IV, a partial left ilium with sacral ribs, the right pubis, a partial ischium, the left femur, and both fibulae, and the paratype CRILAR-Pv 613, which consists of an isolated tooth, the right ilium, the right femur, and dorsal ribs. Classification. The describers' phylogenetic analysis places "Bravasaurus" as a derived member of the Lithostrotia, in the clade Aeolosaurini, which they recover as a subclade of Rinconsauria, different from other cladograms. Their cladogram is shown below. Paleoenvironment. The holotype locality, the Quebrada de Santo Domingo site , preserves one of the largest concentrations of titanosaur eggs in the world. The describing authors suggest some connection with either "Bravasaurus" or its contemporary "Punatitan", which was described in the same paper.