title: A new titanosaur sauropod from the Atacama Desert, Chile.
abstract: Partial remains of a titanosaur sauropod collected in the Tolar Formation (Upper Cretaceous) at the Atacama Desert (Antofagasta Region), northern Chile, is described, and a new species, Atacamatitan chilensis gen. et sp. nov., is erected. The material consists mainly of dorsal and caudal vertebrae, part of a humerus and a femur. The presence of a titanosaur confirms the Cretaceous age for the outcrops of red sandstone of the Tolar Formation whose age was previously uncertain, ranging from the Upper Cretaceous to the Paleocene. The new specimen represents the most complete dinosaur reported for this region and one of the most complete titanosaur known from Chile and the pacific margin of South America so far.
authors: Departamento de Geologia e Paleontologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, Rio de Janeiro, RJ, Brazil. kellner@mn.ufrj.br
authors: Alexander W A
authors: AW
authors: Kellner
authors: David
authors: D
authors: Rubilar-Rogers
authors: Alexander
authors: A
authors: Vargas
authors: Mario
authors: M
authors: Suárez
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000033:anatomy & histology*; D002677:Chile; D025061:Dinosaurs / Q000033:anatomy & histology* / Q000145:classification*; D005269:Femur / Q000033:anatomy & histology; D005580:Fossils; D006811:Humerus / Q000033:anatomy & histology; D013131:Spine / Q000033:anatomy & histology