Leucotrichia riostoumae
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Ordo: Trichoptera
Familia: Hydroptilidae
Genus: Leucotrichia
Name
Leucotrichia riostoumae Thomson & Holzenthal sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Diagnosis
This species is similar to Leucotrichia forrota and Leucotrichia inops. These species share a similar combination of characteristics present in the phallus, as discussed under Leucotrichia forrota. Of these species, Leucotrichia riostoumae sp. n., is most similar to Leucotrichia inops, as discussed under Leucotrichia inops. Leucotrichia riostoumae can be distinguished by the rugose ventral surface of the mesoventral process of sternum VII, which is lacking in Leucotrichia inops. The membranous ridges along the apex of the phallus, which give it a star-like appearance when viewed dorsally, are also a feature unique to Leucotrichia riostoumae.
Description
Male. Length of forewing 3.6–4.2 mm (n=11). Head unmodified, with 3 ocelli; antennae unmodified. Dorsum of head dark brown with yellow and dark brown setae; thorax dark brown with bright yellow setae dorsally, dark brown ventrally; leg segments with dark brown setae. Forewings covered with fine dark brown setae with large patch of yellow setae on basal 2/3. Genitalia. Abdominal sternum VII with digitate, rugose mesoventral process with small basal ridge. Sternum VIII in ventral view with posterior margin concave. Segment IX anterolateral margin produced dorsolaterally, posterolateral margin convex; in dorsal view anterior margin concave, posterior margin broadly convex. Tergum × with dorsal sclerite simple; ventral sclerite with rounded projection on posterior margin; membranous apex small. Subgenital plate with dorsal arm digitate, broadest basally; ventral arm slender, digitate, in ventral view triangular. Inferior appendage basally subquadrate, apex rounded, without dorsal spine; in ventral view apically digitate. Phallus with basal loop not apparent; apex curving ventrad and laterad, with series of membranous spines appearing stellate in dorsal view.
Holotype male: ECUADOR: Imbabura: Reserva los Cedros, Río de la Plata, 00.32495°N, 78.78084°W, el. 1587 m, 18.x.2011, Holzenthal, Ríos, Encalada, and Acosta, (UMSP000140832) (UMSP). Paratypes: same data as holotype, 5 males (UMSP); same data as holotype, 3 males (MZUTI); same data as holotype, 2 males (NMNH).
Etymology
Named in honor of Dr. Blanca Ríos-Touma, an aquatic ecologist and colleague who helped collect the holotype specimen.
Original Description
- Thomson, R; Holzenthal, R; 2015: A revision of the Neotropical caddisfly genus Leucotrichia Mosely, 1934 (Hydroptilidae, Leucotrichiinae) ZooKeys, (499): 1-100. doi
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