Austrotinodes taquaralis, Thomson, Robin E. & Holzenthal, Ralph W., 2010

Thomson, Robin E. & Holzenthal, Ralph W., 2010, New Neotropical species of the genus Austrotinodes Schmid (Trichoptera: Ecnomidae), Zootaxa 2437, pp. 38-50 : 47-49

Austrotinodes taquaralis , new species

Fig. 6

Diagnosis. This species is most similar to A. belchioris , new species, and A. abrachium , new species. In A. taquaralis , the intermediate appendage is lacking the basoventral branch of A. belchioris but has instead a single basoventral seta. While the dorsal branch of the intermediate appendage in A. belchioris has 2 setae, there are 3–4 present in A. taquaralis . Additionally, in A. taquaralis , the membranous apical region of the phallus is shorter in proportion to the lateral process than in A. belchioris or A. abrachium .

Description. Male. Forewing length 4.9–5.3 mm (n=6). Body sclerites brown, dorsum of head light brown with pale yellow and light brown setae; thorax light brown with pale yellow setae dorsally, light brown ventrally; leg segments with brown setae. Forewings covered with fine dark brown and pale yellow setae in a mottled pattern. Genitalia. Segment IX deeply divided, sternum elongated; in lateral view, enlarging apically, ventral margin slightly convex; in ventral view, apical margin convex. Phallic guide sclerotized, not highly elevated; in lateral view, base narrow, apex pointed, reaching tip of inferior appendage; in caudal view, with single indentation. Inferior appendages fused mesally, attached apicomesally on sternum IX; in lateral view, ovate; in ventral view, lateral lobes subquadrate, directed posterolaterally, posterior margin concave with central point. Tergum X divided into pair of semimembranous oval lobes, lobes bulbous, bearing dorsal setae. Preanal appendage long, surface setose, margin crenulated, parallel-sided, apex rounded. Intermediate appendage long, approximately 3/4 length of preanal appendage; in lateral view, curved; single; bearing 3–4 large spinelike setae apically and 1 seta basoventrally. Phallus with sclerotized phallobase and membranous apical region; lateral process elongate, bifid, dorsal branch long, wide, ventral branch short, narrow, dorsal branch with row of 2 subapical and 1 apical spines, ventral branch with 1 apical spine; without basomesal process.

Type material. Holotype: Male, Brazil: Rio de Janeiro: Parque Nacional Itatiaia, Rio Taquaral, 22˚27.252’S, 44˚36.570’W, 1300 m, 22–23.xi.2001, Holzenthal and Blahnik ( UMSP 000081755) ( MZUSP). Paratypes: same as holotype, 2 females ( UMSP); Brazil: Minas Gerais: Aldeia da Cachoeira das Pedras, 20˚06.824’S, 44˚01.412’W, 925 m, 28–29.ix.2000, Paprocki and Braga, 1 male, 3 females ( MZUSP); Parque Estadual Itacolomi, Rio Belchior, 20˚25.041’S, 43˚25.663’W, 725 m, 2.ii.1998, Holzenthal and Paprocki, 2 males, 12 females ( UMSP); Estação Ecológica de Tripu, Córrego Botafoga, 20˚22.908’S, 43˚33.615’W, 1100 m, 1.ii.1998, Holzenthal and Paprocki, 1 male ( UMSP); Cachoeira do Abacaxi, Vale de Tropeiro, Ouro Preto, 20˚12.270’S, 43˚38.163’W, 1120 m, 7.xi.2001, Paprocki, Blahnik, and Amarante, 1 male ( NMNH).

Etymology. Named for Rio Taquaral, the river where the holotype was collected.

Figures

FIGURE 6. Male genitalia of Austrotinodes taquaralis, new species: A, left lateral. B, dorsal. C, ventral. D, phallus, left lateral. E, phallus, dorsal. F, inferior appendage and phallic guide, caudal.