Araneae, Dipluridae, Trechona venosa Latreille, 1832: first record for the state of Minas Gerais, Brazil, and distribution map

Abstract

Herein is reported the first record of Trechona venosa (Araneae, Dipluridae) for the state of Minas Gerais. The previous records are restricted to a maximum range of about 50 km from the Atlantic Ocean coast, in the states of Rio de Janeiro and Espírito Santo. The new record extends the species distribution to 200 km far from coast.

Further advancements in the taxonomy of Trechona spiders (Araneae: Dipluridae): two new species, redescription of Trechona uniformis Mello‐Leitão, 1935, additions to descriptions of Trechona rufa Vellard, 1924 and Trechona venosa (Latreille, 1832) and key to the species

“…44 (male description, misidentification); Pedroso and Baptista , 151–156; Pedroso et al . , 360, 361, 365, figs 1–9 (new status); Azevedo and Pedroso , 583–584, figs 1–2.…”

“…Minas Gerais, Viçosa, Mata do Paraíso, 25.v.2009, Pedroso, D. R. & Azevedo, L. P. leg . (1 female, 1 juvenile, MNRJ 00100) (see Azevedo and Pedroso ). Rio de Janeiro, Arraial do Cabo, Ilha de Cabo Frio, trilha do farol velho, ii.2006, Wienskoski, E. H. L. leg (2 females, MNRJ 04425); Nova Iguaçu, Reserva Biológica do Tinguá, 15.v.2002, Folly, E. R. & Walter leg .…”

“…) has the widest distribution of all species in the genus, occurring in southeastern Brazil, from Rio de Janeiro and Nova Iguaçu cities (south of the state of Rio de Janeiro), to Santa Teresa municipality (northeast of the state of Espírito Santo). The westernmost localities are the municipalities of Viçosa (Azevedo and Pedroso ) and Grão Mogol, both in the state of Minas Gerais. Almost all known records are from localities at the Atlantic Forest biome, with the exception of Grão Mogol.…”

An unusual new species of Trechona (Araneae: Mygalomorphae: Dipluridae), from quartzitic caves of the Diamantina Plateau, Minas Gerais, Brazil, with a key to the known species

“…Following the taxonomic changes proposed by Pedroso et al (2008), the genus currently comprises three species: T. rufa Vellard 1924, T. uniformis Mello-Leitão1935 and T. venosa (Latreille 1932) (World Spider Catalog 2016). The species described so far have been recorded from the states of São Paulo, Rio de Janeiro, Minas Gerais and Espírito Santo (Pedroso and Baptista 2004;Pedroso et al 2008;Azevedo and Pedroso 2010). However, unidentified specimens have been examined from the states of Bahia, in northeastern Brazil, and Santa Catarina and Rio Grande do Sul, in southern Brazil.…”

“…Setae of the second kind are shorter and thinner, with an acute apex, arranged in several series in front of the row of large setae (Pedroso et al 2008). Trechona species are also characterised by having a body size ranging from 25 to 50 mm in length, and a transverse-striped pattern on the abdominal dorsum (Raven 1985;Azevedo and Pedroso 2010). Typical Trechona, for example T. venosa and T. rufa, live in burrows without an aboveground web; at most, there is a veil of silk threads covering the silk-lined entrance of the burrow.…”