Bistriopelma, a new genus with two new species from Peru (Araneae: Theraphosidae: Theraphosinae)
Revista peruana de biología 22(3): 275 - 288.
Abstract
<i>Bistriopelma</i> gen. nov. from the Andean region in Peru is here described, diagnosed and illustrated, together with two new species <i>Bistriopelma lamasi</i> sp. nov. as a type species and <i>Bistriopelma matuskai</i> sp. nov. This new genus differs from all other theraphosid genera, except the genus <i>Phrixotrichus</i> Simon 1889 (sensu Perafán & Pérez-Miles 2014) and the troglobite species <i>Tmesiphantes hypogeus</i> Bertani, Bichuette & Pedroso 2013, in the presence of two abdominal dorsolateral patches of the type III urticating setae. <i>Bistriopelma</i> gen nov. can be distiguished from <i>Phrixotrichus</i> by the different shape of spermathecae in females, consisting of two separate subparallel seminal receptacles in <i>Bistriopelma</i> gen. nov. but strongly divergent in <i>Phrixotrichus</i> and by the different morphology of male palpal bulb (embolus projecting retrolaterally from tegulum in <i>Bistriopelma</i> gen. nov. against posteriorly in <i>Phrixotrichus</i>); furthermore by the presence of basal spine on prolateral tibial apophysis, the absence of the type IV urticating setae and paired tarsal claws denticulate. <i>Bistriopelma</i> gen. nov. is separated from <i>Tmesiphantes hypogeus</i> by the position of the urticating seta patches (middle of abdomen in <i>Bistriopelma</i> gen. nov. and posterior half in <i>Tmesiphantes hypogeus</i>), the different shape of spermathecae (long separate seminal receptacles with subapical constriction in <i>Bistriopelma</i> gen. nov. and short, subtriangular and widely separated in <i>Tmesiphantes hypogeus</i>) and also in the extension of metatarsal scopulae. Additional comments and a distribution map of all species of this genus are provided.