Austrotinodes abrachium, 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

Austrotinodes abrachium , new species

Fig. 1

Diagnosis. This species is most similar to A. belchioris , new species, and A. taquaralis , new species, differing in its lack of an intermediate appendage. In A. abrachium , the phallic guide is elevated higher over the inferior appendage than in either A. belchioris or A. taquaralis . In A. brachium , the phallic guide is pointed in caudal view, while in A. belchoris and A. taquaralis it has a single indentation.

Description. Male. Forewing length 4.3 mm (n=1). Body sclerites brown, dorsum of head unknown, head missing; thorax light brown with pale yellow and light brown setae dorsally, light brown ventrally; leg segments with brown setae. Forewings covered with fine pale yellow setae with small scattered patches of light brown setae. Genitalia. Segment IX deeply divided, sternum elongated; in lateral view, enlarging medially, ventral margin slightly curved apically; in ventral view, apical margin convex. Phallic guide sclerotized, elevated over inferior appendages; in lateral view, base narrow, apex pointed, reaching middle of inferior appendage; in caudal view, pointed. Inferior appendages fused mesally, attached apicomesally on sternum IX; in lateral view, subquadrate; in ventral view, lateral lobes ovate, directed posterolaterally, posterior margin concave with central point. Tergum X divided into pair of semimembranous oval lobes, separated by deep emargination, bearing dorsal setae. Preanal appendage long, surface setose, margin smooth, widest basally, narrowing apically, apex acute. Intermediate appendage absent. Phallus with sclerotized phallobase and membranous apical region; lateral process elongate, bifid, dorsal branch short, wide, ventral branch long, widest basally, dorsal branch with 1 apical spine, ventral branch with 1 mesal and 2 subapical spines; without basomesal process.

Type material. Holotype: Male, Brazil: Minas Gerais: Rio Paraúna, 3 km S Santana do Riacho, 19˚10.986’S, 43˚43.485’W, 650 m, 16.ii.1998, Holzenthal and Paprocki ( UMSP 000031646) ( MZUSP).

Etymology. Named for the absence of the intermediate appendage.

Figures

FIGURE 1. Male genitalia of Austrotinodes abrachium, new species: A, left lateral. B, dorsal. C, ventral. D, phallus, left lateral. E, phallus, dorsal. F, inferior appendage and phallic guide, caudal.