Species: mirim SIMOES, SOBRAL, MACRI, EBEL, FACHINI, MARTINELLI, NAVA, PAIXAO, CHIAPPE, DI-POI & HSIOU, 2026
Etymology: Brazillian, Tupi-Guarani language, mirim, "small-sized".

Holotype: MPM 420

Locality: William's Quarry 2, Sitio Paleontologico 'Jose Martin Suarez', Presidente Prudente Municipality, Sao Paulo State, Brazil.

Horizon: Admantina Formation, Bauru Group.

Biostratigraphy:

Age: Late Santonian to Early Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Skull and nearly complete skeleton.