New information on Lessemsaurus sauropoides (Dinosauria: Sauropodomorpha) from the Upper Triassic of Argentina

POL, D.; POWELL, J.E.

Special Papers in Palaeontology

The Palaeontological Association

Lugar: London; Año: 2007 vol. 77 p. 223 - 243

0038 6804

Postcranial remains of Lessemsaurus sauropoides are described herein, including elements of the vertebral column, pectoral girdle, forelimb, pelvis and hindlimb. These remains were closely associated with the cervicodorsal neural arches previously described from this taxon. This assemblage of bones shows numerous derived characters, including some derived similarities exclusively shared with Antetonitrus ingenipes from the Late Triassic of South Africa. Additionally, this material reveals an unusual combination of plesiomorphic character states present in many non-eusauropod sauropodomorphs together with derived characters that suggest affinities with eusauropods and related taxa.