Austrotinodes longispinum, 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 : 45-47

Austrotinodes longispinum , new species

Fig. 5

Diagnosis. This species is closest to A. prolixus Flint and Denning , differing in the shape and setation of the lateral process of the phallus. In A. longispinum , the lateral process is widest mesally while in A. prolixus it is widest basally. The lateral process of A. longispinum bears 1 elongate mesolateral spine and 1 small apical spine. The lateral process of A. prolixus bears 1 slender and 2 enlarged mesolateral spines and 1 enlarged apical spine. Additionally, the phallus of A. longispinum has a more extensive apical membranous region than that of A. prolixus .

Description. Male. Forewing length 4.6–5.2 mm (n=3). Body sclerites brown, dorsum of head dark brown with pale yellow and dark brown setae; thorax dark brown with pale yellow and dark brown setae dorsally, light brown ventrally; leg segments with brown setae. Forewings covered with fine light brown setae with small scattered patches of pale yellow setae. 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, elevated over inferior appendages; in lateral view, base broad, apex hooked, reaching middle of inferior appendage; in caudal view, with single indentation. Inferior appendages fused mesally, attached apicomesally on sternum IX; in lateral view, quadrate, apex truncate; in ventral view, lateral lobes triangular, directed posterolaterally, posterior margin with mesal emargination. 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, apex broadly rounded. Intermediate appendage long, approximately 3/4 length of preanal appendage; in lateral view, straight; bifid basally, with long, straight dorsal branch and very short basoventral branch; dorsal branch bearing 1 short subapical seta, short basoventral branch with 1 short apical seta. Phallus with lightly sclerotized phallobase and membranous apical region; lateral process short, elongate oval, widest mesally, with 1 very elongate, mesolateral spine, and 1 small apical spine; without basomesal process.

Type material. Holotype: Male, Brazil: São Paulo: Cachoeira do Paredão, Lajeado, Serra da Bocaina, 22˚43.533’S, 44˚37.274’W, 1550 m, 1–2.iii.2002, Holzenthal, Blahnik, Paprocki, and Prather ( UMSP 000088117) ( MZUSP). Paratypes: same as holotype, 1 male, 1 female ( UMSP); Rio de Janeiro: P. N. da Serra dos Órgãos, Rio Beija-flor, 22˚27.063’S, 43˚00.065’W, 1125 m, 27.ii.2002, Holzenthal, Blahnik, Paprocki, and Prather, 1 male ( UMSP).

Etymology. Named for the elongate mesolateral spine observed on the phallus.

Figures

FIGURE 5. Male genitalia of Austrotinodes longispinum, new species: A, left lateral. B, dorsal. C, ventral. D, phallus, left lateral. E, phallus, dorsal. F, inferior appendage and phallic guide, caudal.