On Nesticus from Meridional South America (Araneae, Nesticidae)

Abstract

Five new species of Nesticus Thorell, 1869 are described: N. potreiro, N. taim from southern Brazil; N. brignolii from southern Brazil, Argentina and Uruguay; N. calilegua from southern Brazil and Argentina and N. ramirezi, from Argentina. The male palpus and female epyginum of N. brasiliensis Brignoli, 1979 are illustrated. Described species were collected in epigean habitats, in shrubs, leaf-litter, under stones, bricks, tiles or debris.

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

“…Male and females were not collected together, but were matched based on body size, shape and color pattern. Ott & Lise, 2002 New record. BRAZIL, Minas Gerais: Ouro Preto (Parque Estadual do Itacolomi, 20°22'S 43°32'W), 2-4.XI.2007, K.P.…”

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).…”

“…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). Females, on the other hand, can be diagnosed by the prominent epigynum (Gertsch, 1984) and the vulval gland with a gland duct (Lehtinen and Saaristo, 1980;Ott and Lise, 2002).…”

“…They are small and ecribellate spiders, recognized by a combination of characters that include a rebordered labium, and the presence of a well-developed basal paracymbium on the palp of the male; the females are characterized by a large palpal claw (Brescovit et al, 2002;Paquin and Hedin, 2005). 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).…”

Redescription of “Nesticus” citrinus (Taczanowski, 1874) (Araneae, Araneoidea) from French Guyana

“…At first glance this species looks very different from any other Nesticidae known to us, in having a whitish abdomen formed with guanine spots and lacking a comb on tarsi IV. Search of literature proved the existence of some “ Nesticus ” with white abdomen and well developed pattern in South America (Ott and Lise 2002). In addition the syntype females have a large and straight palpal claw (Fig.…”