A revision and phylogenetic analysis of the spider genus Oxysoma Nicolet (Araneae: Anyphaenidae, Amaurobioidinae)

AISEN, S.; RAMIREZ, M.J.

ZOOTAXA

MAGNOLIA PRESS

Lugar: Auckland; Año: 2015

1175-5326

We review the spider genus Oxysoma Nicolet, with most of its species endemic from the southern temperate forests in  Chile and Argentina, and present a phylogenetic analysis including seven species, of which three are newly described in  this study (O. macrocuspis new species, O. kuni new species, and O. losruiles new species), together with other 107 representatives  of Anyphaenidae. New geographical records and distribution maps are provided for all species, with illustrations  and reviewed diagnoses for the genus and the four previously known species (O. punctatum Nicolet, O. saccatum  (Tullgren), O. longiventre (Nicolet) and O. itambezinho Ramírez). The phylogenetic analysis using cladistic methods is  based on 264 previously defined characters plus one character that arises from this study. The three new species are closely  related with Oxysoma longiventre, and this four species compose what we define as the Oxysoma longiventre species  group. The phylogenetic analysis did not retrieve the monophyly of Oxysoma, which should be reevaluated in the future,  together with the genus Tasata.