Austrotinodes belchioris, 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 : 39-42

Austrotinodes belchioris , new species

Fig. 2

Diagnosis. This species is most similar to A. taquaralis , new species, and A. abrachium , new species. In A. belchioris , the intermediate appendage is bifid basally with a dorsal branch and a basoventral branch. In A. taquaralis , the basoventral branch is lacking; in A. abrachium the intermediate appendage is lacking. Additionally, in A. belchioris , the ventral and dorsal branches of the lateral process of the phallus are more equal in length than in A. taquaralis .

Description. Male. Forewing length 4.7–4.9 mm (n=5). Body sclerites brown, dorsum of head dark brown with pale yellow and light brown setae; thorax dark brown with pale yellow setae dorsally, light brown ventrally; leg segments with brown setae. Forewings covered with fine light 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 broad, apex pointed, reaching tip of inferior appendage; in caudal view, with single indentation. Inferior appendages fused mesally, attached subapicomesally on sternum IX; in lateral view, narrowly ovate, apex acute; in ventral view, lateral lobes elongate, narrow, directed posterolaterally, posterior margin concave with central point. Tergum X divided into pair of semimembranous oval lobes, separated by shallow emargination, bearing dorsal setae. Preanal appendage long, surface setose, margin crenulated, parallel-sided, curving dorsally, apex narrowly rounded. Intermediate appendage long, approximately 3/4 length of preanal appendage; in lateral view, straight; bifid basally, with long, curved dorsal branch and curved basoventral branch; dorsal branch bearing 2 long subapical setae, basoventral branch with 1 long apical seta. Phallus with lightly sclerotized phallobase and membranous apical region; lateral process elongate, bifid, dorsal branch widest subapically, ventral branch narrow, branches subequal, 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: Minas Gerais: Parque Estadual do Itacolomi, Córrego Belchior, 20˚25.048’S, 43˚25.737’W, 24.i.1999, Amarante ( UMSP 000047058) ( MZUSP). Paratypes: same as holotype, 3 males, 4 females ( UMSP); Brazil: Minas Gerais: Parque Estadual do Itacolomi, Rio Belchior, 20˚25.041’S, 43˚25.633’W, 725 m, 2.ii.1998, Holzenthal and Paprocki, 1 male ( MZUSP).

Etymology. Named for Córrego Belchior, the stream where the holotype was collected.

Figures

FIGURE 2. Male genitalia of Austrotinodes belchioris, new species: A, left lateral. B, dorsal. C, ventral. D, phallus, left lateral. E, phallus, dorsal. F, inferior appendage and phallic guide, caudal.