Species: guinazui BONAPARTE, 1970
Etymology:

Locality: Loma del, Pterodaustro Fossil Site, 4 km SSW and 116 km from ruta nacional 147, Depto Belgrano, Sierra de las Quijadas, San Luis Province, Argentina.

Horizon: Inferior Lagarcito Formation.

Biostratigraphy:

Age: Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Referred material:

CHIAPPE, CODORNIU, GRELLET-TINNER & RIVAROLA, 2004

MHIN-UNSL-GEO-V 246: Pterosaur embryo within an egg.