Neotrichia mucajai, 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 : 184-185

Neotrichia mucajai sp. nov.

Figures: 4A–4D

Diagnosis. This species does not fit well into any of the Species Groups of Marshall (1979) as defined by Keth et al. (2015). The male of Neotrichia mucajai sp. nov. resembles Neotrichia botka Oláh & Johanson 2011 in the long subgenital plate ( Fig. 4A , sg) and elongate, rod-shaped bracteoles ( Figs 4A, 4C , br). The new species differs from N. botka by segment IX having a long and slightly bifid process posteroventrally ( Fig. 4C ), and by the easily discernible segment X ( Figs 4A, 4B ).

Description. Male (in alcohol): Dark brown, with length of each forewing 1.1 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 retracted in segment VIII, anterolateral margins produced anterad at midheight in lateral view ( Fig. 4A ), anterodorsal margin V-shaped in dorsal view ( Fig. 4C ), anteroventral margin U-shaped in ventral view ( Fig. 4B ); dorsal surface with pair of protrusions each bearing apical seta ( Figs 4A, 4C ); posterolateral margins each with projection at midheight bearing 3 apical and subapical setae ( Figs 4A , dotted lines in 4B, pj); posterolateral margin sclerotized mesally, with paired membranous processes slightly longer than inferior appendages each bearing short apical seta and a small median projection also ending in a short seta ( Figs 4 A–4C, mp). Segment X membranous, fused with dorsum of segment IX, in lateral view large, tapered to blunt apex, and with pair of membranous ventrolateral processes bearing apical setae ( Figs 4A, 4B , vlp); in dorsal view, with deep mesal incision, pair of lateral lobes tapering apically and directed posterocaudad ( Figs 4A, 4C, X ). Subgenital plate in lateral view long, dorsally sclerotized and with apically downturned beak-like apex ( Fig. 4A , sg); in ventral view long, wide basally and tapered to slightly quadrate apex, incised medially and flanked by a pair of apicolateral spines directed mesad ( Fig. 4C , sg). Bracteoles elongate, rod-shaped ( Figs 4A, 4C , br). Inferior appendages long, slender, tapering apically ( Figs 4A, 4C , ia). Phallus slender distally, ending in sclerotized apical spine; paramere surrounding shaft and extending short distance posterad ( Fig. 4D , pr); ejaculatory duct protruding apically ( Fig. 4D , 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 “ mucajai ” is a noun used in apposition, referring to the Mucajai River, a western tributary of the Branco River.

Figures

FIGURE 4. Neotrichia mucajai sp. nov., male genitalia. 4A, left lateral; 4B, ventral; 4C, dorsal; 4D, phallus, left lateral. br = bracteole (paired), ed = ejaculatory duct, ia = inferior appendage (paired), mp = membranous posterolateral process of segment IX (paired), pj = posterolateral projection of segment IX (paired), pr = paramere, sg = subgenital plate, vlp = ventrolateral process of segment X (paired), X = lobes of segment X (paired).