A review of the Chilean spider genus Olbus, with notes on the relationships of the Corinnidae (Arachnida, Araneae)

The Chilean spider genus Olbus is revised to include five species: Olbus sp arassoides (Nicolet), and four new species, O. jaguar, O, nahuelbuta, O. er yngiophilus, and O. krypto. The genus is diagnosed by the presence of one a pical thickened sera on the palpal tarsus. Differing from the subfamilies C orinninae, Castianeirinae and Trachelinae, the median apophysis is retained on the male palpal bulb, as occurs also in the corinnid genera landuba Bon aldo, Mandaneta Strand, Procopius Thorell and Pseudocorinna Simon. Olbus an d these genera are placed in Corinnidae incertae sedis. A particular arrang ement of enlarged cylindrical gland spigots, at least three on posterior me dian spinnerets, and two on posterior laterals, is proposed as a synapomorp hy of Corinnidae. O. krypto, only known from a male with quite divergent ch aracters, is placed provisionally in the genus.