A revision of the Neotropical caddisfly genus Leucotrichia Mosely, 1934 (Hydroptilidae, Leucotrichiinae) Author Thomson, Robin E. Author Holzenthal, Ralph W. text ZooKeys 2015 499 1 100 http://dx.doi.org/10.3897/zookeys.499.8360 journal article http://dx.doi.org/10.3897/zookeys.499.8360 1313-2970-499-1 7F1EE873CBBC476B984DF483D91B4901 7F1EE873CBBC476B984DF483D91B4901 Taxon classification Animalia Trichoptera Hydroptilidae Leucotrichia repanda Thomson & Holzenthal sp. n. Fig. 36 Diagnosis . This species is most similar to Leucotrichia ayura . These species share similarities in the mesoventral process of sternum VII, the shape of sternum VIII, the shape of the inferior appendage, and sclerites observed on the phallus apex, as discussed under Leucotrichia ayura . Leucotrichia repanda sp. n., can be easily distinguished from Leucotrichia ayura by the presence of a pair of sharply bent dorsal sclerites, a pair of curved lateral sclerites, and an apical tuft of setae on the phallus apex, all of which are absent in Leucotrichia ayura . The presence of 3 apicodorsal setae on the inferior appendage also separates Leucotrichia repanda from Leucotrichia ayura , which lacks these setae. Description. Male. Length of forewing 1.9-2.4 mm (n=13). Head unmodified, with 3 ocelli; antennae unmodified. Dorsum of head dark brown with yellow and brown setae; thorax dark brown with yellow setae dorsally, brown ventrally; leg segments with brown setae. Forewings covered with fine dark brown setae with large patch of bright yellow setae on basal 1/3. Genitalia. Abdominal sternum VII with short mesoventral process. Sternum VIII in ventral view with posterior margin concave. Segment IX anterolateral margin produced mesally, posterolateral margin convex; in dorsal view anterior margin concave, posterior margin concave. Tergum x with dorsal sclerite elongate, with crenulate dorsal margin; ventral sclerite slender, simple; membranous apex not well developed. Subgenital plate with dorsal arm not apparent; ventral arm broadest basally, apex slightly hooked dorsad, in ventral view appearing "winged" . Inferior appendage apex rounded, bearing single mesodorsal seta and 3 apicodorsal setae; in ventral view entirely fused, apex emarginated. Phallus apex bearing apical setal tuft and 3 pairs of sclerites: 1st pair dorsal, sharply bent dorsad; 2nd pair dorsal, elongate; 3rd pair lateral, broad, curved anteriad. Holotype male: VENEZUELA: Sucre: Peninsula de Paria, Santa Isabel, Rio Sta. Isabel, 10°44.294'N , 62°38.954'W , el. 20 m, 4.iv.1995, Holzenthal, Flint, and Cressa (UMSP000201685) (UMSP). Paratypes: same data as holotype, 3 males, 2 females (UMSP); same data as holotype, 1 male, 1 female (MIZA); VENEZUELA: Aragua: Est. Exp. Cataurito, ca. 32 km E Villa de Cura, 1100 m, 1.ii.1983, O.S. Flint, Jr., 2 males, 1 female (in alcohol) (NMNH); Est. Exp. Cataurito, 28.i.1983, O.S. Flint, Jr., 1 male (NMNH); Est. Exp. Cataurito, 1.ii.1983, O.S. Flint, Jr., 7 males (NMNH). Etymology. Repandus, Latin for "bent backward, turned up", referring to the bent shape of the 1st pair of dorsal sclerites on the phallus.