[N] 2004 Rinconsaurus caudamirus
Calvo, J.O. & Gonzalez Riga, B.J.G. (2003) Rinconsaurus caudamirus gen. et sp nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina. Revista Geologica de Chile 30 (2):333-353
The remains of this slender Titanosaurid include 13 articulated caudal vertebrae and disarticulated cranial, cervical, dorsal and appendicular materials. These fossils belong to three individuals, two adults and one juvenile.
Rinconsaurus is characterized by the following association of autapomorphies: (1) neural spines in mid- anterior dorsal vertebrae inclined posteriorly more than 60 degrees with respect to the vertical, (2) middle caudal vertebrae with bony processes that support the articular surfaces of postzygapophyses, and (3) procoelous posterior caudal centra with intercalation of a series of amphicoelous-biconvex or amphicoelous-opisthocoelous- biconvex centra.