Neotrichia quitauau sp. nov.

Figures: 5A–5D

Diagnosis. This species belongs to the Neotrichia canixa Species Group of Marshall (1979) as defined by Keth et al. (2015), based on the sclerotized horns projecting from the apex of segment X and bifid inferior appendages. The male of Neotrichia quitauau sp. nov. is similar to those of Neotrichia canixa (Mosely 1937), Neotrichia maya Harris & Flint 2016, and Neotrichia unamas Botosaneanu & Alkins-Koo 1993 in the inturned hooks of tergum X (Figs 5A, 5C) and in the bifid inferior appendages (Figs 5A, 5B, ia). The new species differs from those three species by the posterolateral margins of segment IX that each have a shorter, unbranched, setose rod (Figs 5 A–5C, sr) and by the hooks of tergum X being longer and more strongly inturned.

Description. Male (in alcohol): Dark brown, with length of each forewing 1.3 mm (holotype). Postoccipital setal warts pronounced, large, ovoid. Antennae each with 18 articles; scape normal, cylindrical, slightly longer than pedicel; flagellomeres each as long as pedicel, cylindrical. Maxillary palp formula I-II-IV-III-V (shortest to longest), first two articles shorter than wide. Mesoscutellum with anterior margin convex; metascutellum convexly subtriangular.

Male genitalia. Segment IX with anterolateral margins rounded in lateral view (Fig. 5A), anterodorsal margin evenly concave in dorsal view (Fig. 5C), anteroventral margin V-shaped in ventral view (Fig. 5B); dorsal surface with pair of small, bare protrusions (Figs 5A, 5C); posterolateral margins in lateral view sinuous and slightly sclerotized, with paired membranous processes much shorter than segment X, each bearing one apical and one subapical seta (Figs 5 A–5C, mp), strongly sclerotized posterolateral margins below membranous processes each with single seta (Figs 5A, 5B, plm). Segment X fused with dorsum of segment IX; apex giving rise to pair of long, heavily sclerotized, strongly inturned horns, crossing each other and extending beyond bases of opposing horns (Figs 5A, 5C). Subgenital plate in lateral view narrowing distally to downturned and bifid apex bearing elongate setae (Fig. 5A, sg); in ventral view wide basally, narrowing distally to sharp medial point flanked by pair of elongate setae (Fig. 5B, sg). Inferior appendages slender, elongate and bifid; in lateral view, each with lateral process with apex angled slightly upward; mesal process about one-half length of lateral process, tapered and bearing apical seta (Figs 5A, ia); in ventral view, lateral process truncated and slightly inturned apically; mesal process elongate, wide basally, narrowing distally and bearing apical seta (Figs 5B, ia). Phallus elongate with wide tubular base narrowing to median

constriction; paramere encircling shaft and extending posterad 3/4 length of apical half (Fig. 5D, pr); apical portion slender, tapering, ending in bifid apex with ends crossed, ejaculatory duct protruding distally (Fig. 5D, ed).

Female, larva, pupa, and egg. Unknown.

Holotype male. BRAZIL: Roraima: Iracema municipality, Vicinal Campos Novos (Fazenda Rancho Fundo), small order stream, 2°21’26.22”N, 61°23’38.98”W, 209 m a.s.l., 16 Mar. 2018, Pennsylvania light trap, J.L. Gama Neto, leg. (alcohol; MPEG).

Distribution: Brazil (Roraima, type locality only).

Etymology. The specific name “ quitauau ” is a noun used in apposition, referring to the Quitauau River, an eastern tributary of the Branco River.