Species: prima APALDETTI, MARTINEZ, CERDA, POL & ALCOBER, 2018
Etymology: Latin (female), prima, "first."

Holotype: PVSJ 1086

Locality: Marayes-El Carrizal Basin, San Juan Province, northwestern Argentina.

Horizon: Quebrada del Barro Formation.

Biostratigraphy:

Age: Late Norian-Rhaetian Stage, Upper Late Triasisc Epoch, Late Triassic.

Material: 6 articulated posterior cervical vertebrae (C5-C10), glenoid region of right scapula and right forelimb lacking all phalanges (except phalanx IV.1 and V.1-2).

Referred material:

PVSJ 1087: 4 anterior and one distal caudal vertebrae, proximal and distal ends of ulnae and radii, proximal third of left fibula, partial right foot including distal tarsal III and IV, proximal and disal ends of metatarsal I and II, two isoalte non-terminal phalanges, and one ungual I?