Genus: Yacarerani NOVAS, PAIS, POL, CARVALHO, SCANFERLA, MONES & RIGLOS, 2009
Etymology: Guarani Indian languate, 'yacare', their name for the South American crocodile, and rani, 'first'.

Species: boliviensis NOVAS, PAIS, POL, CARVALHO, SCANFERLA, MONES & RIGLOS, 2009
Etymology: In reference to the Republic of Bolovia.

Holotype; MNK-PAL5063

Locality: A locality cropping out in Amboro National Park, 17°34'7"S, 63°51'3"W, Santa Cruz de la Sierra, Bolivia.

Horizon: Cajones Formation.

Biostratigraphy:

Age: Turonian Stage, Uppermost Gallic Subepoch-Santonian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: A complete and exquisitely preserved skeleton.

Referred material:

MNK-PAL5064: Almost complete lower jaws articulated with partial right pterygoid, ectopterygoid, jugal, squamosal, partial quadrates, 12 vertebrae, left femur, proximal end of right femur, partial right tibia, and partial right fibula.

Note: 2 complete, unhatched eggs and an isolated eggshell fragments.