Genus: Bonapartemys LAPPARENT de BROIN & FUENTE, 2001
Etymology:

Species: bajobarrealis LAPPARENT de BROIN & FUENTE, 2001
Etymology:

Holotype: MACN-CH-1469

Locality: 6 km north of "Estancia Ocho Hermanos", west of Lake Musters, Sierra de San Bernardo, Sarmiento Department, Chubut Province, Argentina.

Horizon: Upper part of the Lower Member of Bajo Barreal Formation.

Biostratigraphy:

Age: Neuquenian Tetrapoda Assemblage, Upper Turonian or Coniacian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material: Carapace, plastron, reamins of girdles, limbs and tail.