Taubacrex
Taubacrex is an extinct genus of birds of the family Quercymegapodiidae from the Late Oligocene to Early Miocene Tremembé Formation of the Taubaté Basin in the state of São [Paulo (state)|São Paulo], Brazil. The type species is Taubacrex granivora. In the original description, Herculano [Marcos Ferraz de Alvarenga|Herculano Alvarenga] classified it as a member of family Rallidae. It provides the earliest fossil record of gastroliths in birds of the order Galliformes.