Leucotrichia brasiliana Sattler & Sykora, 1977

Thomson, Robin E. & Holzenthal, Ralph W., 2015, A revision of the Neotropical caddisfly genus Leucotrichia Mosely, 1934 (Hydroptilidae, Leucotrichiinae), ZooKeys 499, pp. 1-100 : 12-13

Taxon classification Animalia Trichoptera Hydroptilidae

Leucotrichia brasiliana Sattler & Sykora, 1977 Fig. 11

brasiliana Sattler & Sykora, 1977: 239 [Type locality: Brazil, Amazonas Staat, bereich des Rio Marauía, bei Tapuruquara, oberer Rio Negro; type depository unknown; male; larva, pupa, case].

Diagnosis.

This species is most similar to Leucotrichia sidneyi sp. n. The phallus apex in both species bears a membranous “bulge” on the ventral surface (Fig. 11D), a pair of apical lobes, and lacks apical spines or sclerites. In Leucotrichia brasiliana , the phallus apex bears a pair of lateral sclerites that are U-shaped in lateral view and not present in Leucotrichia sidneyi . The membranous portion of the phallus apex of Leucotrichia brasiliana is truncate in both lateral and dorsal view, while it is small and rounded in Leucotrichia sidneyi .

Description.

Holotype unknown, topotypes pharate adults. Male. Length of forewing 1.3-1.7 (n=2). Head unmodified, but with mandibles (pharate adult), with 3 ocelli; antennae unmodified. Color in alcohol brown. Genitalia. Abdominal sternum VII with mesoventral process broken (indicated in Fig. 11C). Sternum VIII torn in all specimens and difficult to examine in lateral view; in ventral view with posterior margin concave. Segment IX anterolateral margin convex, posterolateral margin with shallow mesal depression; in dorsal view anterior margin straight, posterior margin broadly concave. Tergum × with dorsal sclerite slender, elongate; ventral sclerite large, semielliptic, with tridentate posterior margin; membranous apex truncate. Subgenital plate with dorsal arm not apparent; in ventral view ovate. Inferior appendage broadest basally, apex rounded, bearing single dorsal spine; in ventral view broadly rounded on outer margin. Phallus apex bearing pair of elongate sclerites (U-shaped in lateral view) and pair of apicodorsal lobes.

Material examined.

Topotypes: BRAZIL: Amazonas: from Sattler collection 23, Sattler, 2 larvae, 2 male metamorphotypes, 4 adult metamorphotypes of undetermined gender (NMNH).

Etymology.

Presumably named for the country of Brazil, where the species was collected.