Neotrichia quitauau, Neto & Passos, 2020

Neto, Jaime De Liege Gama & Passos, Mahedy Araujo Bastos, 2020, Additional six new species of Neotrichia Morton 1905 (Insecta: Trichoptera Hydroptilidae) from Roraima state, Brazil, Zootaxa 4881 (1), pp. 179-188 : 185-186

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.

Figures

FIGURE 5. Neotrichia quitauau sp. nov., male genitalia: 5A, left lateral; 5B, ventral; 5C, dorsal; 5D, phallus, lateral. ed = ejaculatory duct, ia = inferior appendage (paired), mp = membranous posterolateral process of segment IX (paired), plm = posterolateral margin of segment IX (paired), pr = paramere, sg = subgenital plate.