Revalidation of Pterinopelma Pocock 1901 with description of a newspecies and the female of Pterinopelma vitiosum (Keyserling 1891)(Araneae Theraphosidae Theraphosinae)

We revalidate the theraphosid genus Pterinopelma Pocock 1901, describe the female of P. vitiosum for first time and Pterinopelmasazimai sp. nov. from Brazil. These two species were included in a matrix with 35 characters and 32 taxa andwere analyzed both with all characters having same weight and with implied weights. Searches considering all charactersnon-additive or some additive were also carried out. The preferred tree, obtained with implied weights, concavity 6 andall characters non-additive shows that Pterinopelma is a monophyletic genus sister to the clade Lasiodora (Vitalius +Nhandu). The presence of denticles on the prolateral inferior male palpal bulb keel is a synapomorphy of the genus.