A new species and a new record of Nesticus from southeastern Brazil (Araneae: Nesticidae)

Abstract

A new species of Nesticus is described based on specimens collected during a structured inventory of the Reserva Particular do Patrimônio Natural Mata Samuel de Paula, state of Minas Gerais, Brazil. Nesticus ivone sp. nov. can be recognized by the paracymbium of the male palpus with three not hooked processes, and by the presence of a central vulval plate in the female epigynum. Additionally, a new record is presented for Nesticus taim Ott & Lise, 2002, extending the known distribution range of this species northwards

Contributions on the spider families Nesticidae and Pholcidae (Araneae) from Argentina

“…Three genera were reported in South America, of which only Nesticus Thorell, 1869 has been recorded for Argentina, with 3 species (Ott and Lise, 2002;World Spider Catalog, 2015): Nesticus brignolii Ott and Lise, 2002; Nesticus calilegua Ott and Lise, 2002;and Nesticus ramirezi Ott and Lise, 2002. The genus actually includes 138 known species (World Spider Catalog, 2015), the majority of which are cavernicoles from temperate areas (Lehtinen and Saaristo, 1980;Gertsch, 1984), while South American species were found on epigeal habitats, such as shrubs near the ground; under stones, bricks, and tiles; and in litter or debris (Ott and Lise, 2002;Faleiro and Santos, 2011). Males of South American species differ from Holarctic ones because the copulatory organs are simpler, with males having 2 processes at the paracymbium and a single suprategular process, and the course of the spermatic ducts (in the suprategulum) configures a loop (Ott and Lise, 2002).…”