The first goblin spiders of the genus Trilacuna from Vietnam (Araneae, Oonopidae)

摘要

Two new species of the genus Trilacuna Tong & Li, T. hamata sp. nov. and T. sinuosa sp. nov., are described from Tam Dao National Park, Vietnam.Oonopids are very small (1-3 mm), haplogyne spiders that occur throughout the temperate and tropical regions of the world. They are among the most diverse spider families with 1135 described species in 93 genera (Platnick 2013). The oonopid spiders of Vietnam are little known. Simon (1893, 1909) reported three species from this region. Recently, three additional species were added (Eichenberger et al. 2012; Platnick et al. 2011, 2012).Trilacuna is a rather small oonopid genus, characterized by the deeply incised labium, branched endites in males, enlarged male palpal femora and pear-shaped bulbs ending in a complicated set of membranes with filiform projections around the embolus. Tong & Li established the genus in 2007 to accommodate two new species, T. angularis and T. rastrum, from southwest China. Subsequently, Eichenberger & Kranz-Baltensperger (2011) described seven species from Thailand, Malaysia and Sumatra. Recently, Grismado et al. (2013) reviewed the genus and reported six new species from India, Nepal and Pakistan. In this paper two new Trilacuna species, T. hamata and T. sinuosa, collected in Vietnam, are described and illustrated.