Austrotinodes quintarellii, Cavalcante, Bruna Maria Da Silva, Dumas, Leandro Lourenço & Nessimian, Jorge Luiz, 2017

Cavalcante, Bruna Maria Da Silva, Dumas, Leandro Lourenço & Nessimian, Jorge Luiz, 2017, Two new species of Austrotinodes Schmid (Insecta, Trichoptera, Ecnomidae) from southeastern Brazil, Zootaxa 4263 (2), pp. 395-400: 396-399

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Austrotinodes quintarellii

new species

Austrotinodes quintarellii  , new species

( Figs 2View FIGURE 2 A –2E)

Diagnosis. Austrotinodes quintarellii  sp. nov. is very similar to A. taquaralis Thomson & Holzenthal 2010  , resembling this species mainly in the general shape of the long intermediate appendages curved upward. However, in the new species the intermediate appendages each has a stout, long lateral seta at mid-length (this seta is absent in A. taquaralis  ), and only 2 subapical setae (3–4 subapical setae in A. taquaralis  ). In A. quintarellii  sp. nov., segment IX is almost as long as wide in ventral aspect (longer than wide in A. taquaralis  ). Additionally, in A. taquaralis  each half of the lateral process of the phallus bears a longer and more slender ventral branch and on the long and slender dorsal branch 3 spine-like setae of almost the same length, with 2 subapical and 1 apical. In A. quintarellii  sp. nov., each half of the lateral process of the phallus has the ventral branch shorter and stouter and with a larger apical seta, there are 3 long lanceolate setae at midlength (the more apical one about half as long as the other 2), and the short and broad dorsal branch has 1 apical seta.

Description. Adult. Length of each forewing 5.1–5.8 mm (n = 3; holotype = 5.1 mm). In alcohol, general color golden brown, with yellowish brown sclerites; antennae stramineous, dorsum of head golden brown, with pale yellow and dark brown setae; thorax golden brown dorsally, light yellow ventrally; legs yellow with brown setae; wings pale brown, forewings with fine pale brown setae dorsally, each with R1 forked apically, forks II –V present; hind wings each with forks II, III and V; discoidal cell open.

Male genitalia. Segment IX deeply divided posterolaterally; sternum elongate anteriorly, in lateral view slightly enlarged apically, ventral margin convex in basal half and almost straight in apical half; in ventral view almost as long as wide, slightly widened apically, anterior margin deeply excavated, apical margin slightly convex. Phallic guide dark, sclerotized, elevated above inferior appendages; in lateral view strongly arched, broad basally, subacute apically, reaching mid-length of inferior appendages. Inferior appendages fused mesally, attached anteromesally to sternum IX; in lateral view short, subquadrate, apicodorsally subacute, basoventral margin produced as ridge; in ventral view elongate, directed laterad, posterior margins concave. Tergum X divided into pair of semimembranous lobes, bearing slender dorsal setae; subquadrate in dorsal view; rounded in lateral view. Preanal appendages longer than other structures, surfaces setose, in lateral view wider basally, rounded apically, dorsal margin slightly crenulate. Intermediate appendages long, almost 3/4 as long as preanal appendages; in lateral view slightly tapering apically, curved dorsad 90°, with 1 short midventral spine-like setae, 1 long mid-lateral spine-like seta, and 2 long subapical spine-like setae. Phallus with sclerotized phallobase and membranous apicoventral region; lateral process covering membranous region, short, about as long as wide, bifid nearly to base, each half with two widely separated branches, no basomesal process, and 5 setae: 3 long lanceolate setae at mid-length (only 2 visible at that position in dorsal view) with more dorsomesal seta half as long as others, ventral branch triangular and with one long and stout apical seta, dorsal branch short and with one lanceolate apical seta.

Holotype male: BRAZIL: Rio de Janeiro: Rio de Janeiro, Parque Nacional da Tijuca, Gruta Paulo e Virgínia, Rio Archer , 22°57’15,3”S, 43°17’29,9”W, 11.iv. 2014, 517 m, BM Silva, LL Dumas, JL Nessimian, CC Gonçalves & SP Gomes leg. ( DZRJ)GoogleMaps  .

Paratypes: BRAZIL: Rio de Janeiro: same locality, 11.xi.2015, BM Silva, LL Dumas, JL Nessimian & F Quintarelli leg., 2 males ( DZRJ). 

Distribution. Brazil (Rio de Janeiro).

Etymology. The species is dedicated to the senior author’s partner, Felipe Quintarelli, in gratitude for his support, encouragement, and participation on collecting trips.