L.S. Filippi1, R.D. Juarez Valieri2 y C.A. Garrido3

Here we report the recovery of a new terrestrial vertebrate assemblage coming from Bajo de la Carpa Formation levels at La Invernada, an oil-field area located 50 kilometers southwestern Rincón de los Sauces city, Neuquén, Argentina. These specimens were detected due to a project of the Museo Argentino Urquiza and Exxon Mobil Company, whose principal objective is the protection of the paleontological legacy from the area. The assemblage is composed by: (1) at least two individuals (one of them juvenile) of titanosaurian sauropods, including cervical, dorsal, and caudal vertebrae, an incomplete sacrum articulated to the right ilium and a portion of the left one, a juvenil rigth ilium, rigth pubis and isquium, articulated left scapula and humerus, distal end of  the left ulna, three left metacarpals (one incomplete), and dorsal ribs; (2) a partial but well-preserved specimen of abelisaurid theropod, composed by a complete braincase fused to the frontals, postorbitals and squamosals, cervical, dorsal and caudal vertebrae, cervical and dorsal ribs, and a distal chevron; and finally (3) a specimen of chelid turtle with a complete caparace of 68 centimeters long. Although the specimens come from different points separate about 300 meters each other, all the remains are located in the same approximate levels of the Bajo de la Carpa Formation, allowing us to infer that the represented species cohabited and probably interacted during Santonian – ealy Campanian times.

1 Museo Municipal Argentino Urquiza. Jujuy y Chaco s/n, 8319, Rincón de los Sauces, Neuquén, Argentina.

2 Secretaría de Cultura de la Provincia de Río Negro, 8332 General Roca, Río Negro, Argentina.

3  Museo Provincial de Ciencias Naturales Prof. Dr. Juan Olsacher, Dirección Provincial de Minería. Etcheluz y Ejército Argentino, 8340, Zapala, Neuquén, Argentina.

 Resumenes XXVIII Jornadas Argentinas de Paleontología de Vertebrados, Zapala-Chocón, Neuquén, Argentina. 21 al 23 de Mayo del 2014.