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Virilastacus jarai, a new species of burrowing crayfish, collected in the Intermediate Depression of the Biobio Region in central-southern Chile is described. This is the fourth species of Virilastacus, a genus endemic to Chile, to be described to date. Features that distinguish V. jarai from its congeneric species are: 1) rostral carina, short, slightly prominent and widely separated from the orbital margin; 2) pilous dorsal side of the opposable margin of the P1 propodus, as is the basal zone of the ventral side, 11 to 22 teeth on its opposable margin; 3) dorsal surface of the P1 dactylus close to the opposable border, hirsute; external distal border of the ischiopodite of the third maxilliped with a large extension that ends in the form of a right angle; 4) precervical cephalothorax with dorsal ridges absent, or with two or four; 5) areola, wide and extended; 6) telson with small, but sharp, lateral spines. Morphologically, this new species is similar to Virilastacus araucanius and V. retamali... |
