Genus: Tiarjudens CISNEROS, ABDALA, RUBIDGE, DENTZIEN-DIAS & BUENO, 2011
Etymology: A combination of Tiaraju District, Sao Gabriel Municipality, Rio Grande do Sul State, Brazil, the type locality, and Latin, dens, "tooth."

Species: eccentricus CISNEROS, ABDALA, RUBIDGE, DENTZIEN-DIAS & BUENO, 2011
Etymology: Latin, "out of the center" used here in its modern sense, meaing something that departs from a conventional or established norm or pattern.

Holotype: UFRGS PV393P

Locality: Tiaraju District, Sao Gabriel Municipality, Rio Grande do Sul State, Brazil.

Horizon: Rio do Rasto Formation.

Biostratigraphy: Correlates with teh Tapinocephalus Assemblage Zone of South African Karoo.

Age: Capitanian Stage, Upper Guadelupian Subepoch, Middle Zechstein Epoch, Late Permian.

Material: Fragmentary skull.