Tratayenia

Tratayenia is a genus of megaraptoran theropod dinosaurs known from remains found in the Santonian-age Bajo de la Carpa Formation of Argentina.[1] The type and only species, Tratayenia rosalesi, was described in March 2018.[2]

Tratayenia can be distinguished from other megaraptorans on the basis of three autapomorphies (unique derived features) of the front portion of each dorsal vertebra, as well as a single autapomorphy of the sacrum. Tratayenia is the youngest known genus of megaraptoran, having lived only about 83 million years ago.