Species: pressor PÜSCHEL, MARTINELLI, SOTO-ACUNA, ORTIZ, LEPPE & VARGAS, 2025
Etymology: Latin, pressor, "one that presses or squeezes"; The name referes to the shape and presence of crests and crenulations of the M1 of this species, which reminds of an orgne or lemon squeezer.

Holotype: SGO.PV 12964

Locality: "Black Bone" Locaity, Rio de Las Chinas valley, 50°42'S, 72°32'W, Ultima Esperanza Province, Magallanes and Chilean Antarctic Region, Chile.

Horizon: Dorotea Formation.

Biostratigraphy:

Age: Late Campanian-Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Lae Cretaceous.

Material: Left maxilla fagment with M1, roots of M2 and mesial roots of M3.A complete crown of a left upper molar.