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 yungarum Angrisano & Burgos, 2002 Figs 4E, 46 yungarum Angrisano & Burgos, 2002: 105 [Type locality: Argentina, Salta, Finca Jakulica , IML; male]. Diagnosis. Leucotrichia yungarum is similar to Leucotrichia alisensis ; the 2 species share a similar shape in both the inferior appendage and the ventral arm of the subgenital plate when viewed laterally. In ventral view, the apex of the inferior appendage is digitate in both species. In Leucotrichia yungarum , the concave posterior margin of sternum VIII is U-shaped and without any emargination (Fig. 46C), while the same margin in Leucotrichia alisensis is V-shaped and with a small mesal emargination. Leucotrichia yungarum also differs from Leucotrichia alisensis in its lack of anterolateral projection in segment IX. Additionally, Leucotrichia yungarum bears an additional pair of posterolateral warts on the head that are not present in Leucotrichia alisensis (Fig. 4E). Description. Redescribed from Angrisano and Burgos (2002) . Male. Length of forewing 3.0 mm (n=1). Head with 2 pairs of posterolateral warts, with 3 ocelli (only 2 given in illustration); antennae unmodified. Genitalia. Abdominal sternum VII with short mesoventral process (not illustrated). Sternum VIII posteroventral projection bearing small peg-like setae, 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 slender, elongate; ventral sclerite simple; membranous apex not well developed. Subgenital plate with dorsal arm not apparent; ventral arm extending dorsad, apex acute. Inferior appendage broadest basally, bearing single dorsal spine; in ventral view with lateral margins parallel. Phallus apex relatively short, without sclerites or spines. Material examined. Holotype male: Holotype deposited at IML, but could not be obtained. Etymology. Named for the phytogeographical region "Yungas" , cloud forest, of northeast Argentina, where the holotype was collected.