Vacunella camachoi sp. nov. and Deltopecten harringtoni sp. nov. are described from the Eurydesma fauna, Bonete Formation (Pillahuinco Group), in the Sierras Australes of the Buenos Aires Province, Argentina. A reassesment of the taxonomy, provincial affinities and age of the fauna reinforces its Gondwana character and indicates its probable correlation with early Permian faunas of Australia.
