Neotrichia caboca,

Neto, Jaime De Liege Gama & Passos, Mahedy Araujo Bastos, 2019, The genus Neotrichia Morton 1905 (Insecta: Trichoptera: Hydroptilidae) in Roraima state, Brazil: New records and description of seven new species, Zootaxa 4695 (6), pp. 516-528: 518-519

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Neotrichia caboca

sp. nov.

Neotrichia caboca  sp. nov.

Figures: 3A–3D

Diagnosis. The male of Neotrichia caboca  sp. nov. is similar to that of Neotrichia botka Oláh & Johanson 2011  due to segment IX, in dorsal view, having a deep, rounded excision and bearing a pair of long dorsal processes; and segment X almost indiscernible, fused to the dorsomesal membranous area of segment IX. However, in the new species the subgenital plate, in lateral view, present a long beak (shorter in N. botka  ) and the bracteoles are spatulate (elongate, rod-shaped in N. botka  ). Additionally, in the new species the phallus apex has a long and sclerotized rod and a subapical sclerotized hook while in N. botka  the phallus apex has two apical hooks of different forms.

Description. Male (in alcohol): Dark brown species with length of each forewing 1.4 mm (holotype). Postoccipital setal warts pronounced, large ovoid. Antennae 18-articulated; scape normal, cylindrical, slightly longer than pedicel; flagellomeres of pedicel size, long cylindrical. Maxillary palp formula I-II-IV-III-V (shortest to longest), first two articles extremely short, shorter than wide. Sternum VII without apicomesal process.

Male genitalia. Segment IX, in lateral view, subtriangular, projecting posterad mesally, sinuous dorsally; in dorsal view, with pair of slender posterodorsal finger-like processes, each bearing fine apical seta; deep rounded excision present anteriorly both in ventral and dorsal views, dorsal excision almost twice as deep as ventral excision and with membranous mesal area apically. Tergum X, in lateral view, triangular; in dorsal view almost indiscernible (except by two pale posterolateral triangular lobes), membranous and covered with microtrichia mesally about where membranous parts of segments IX and X fused. Subgenital plate, in lateral view, with long beak directed downward, pair of beaklike processes arising from mesolateral area and directed downward; in dorsal view, present as fused plate, V-shaped mesal incision between two setae. Bracteoles, in lateral view, spatulate, long, and setose; digitiform in dorsal view. Inferior appendages elongate, digitiform, and completely separated. Phallus narrow with median constriction giving rise to flat, ribbon-like paramere; apex tubular, with long and sclerotized rod, and subapical sclerotized hook.

Female, larva, pupa, and egg. Unknown.

Holotype male. BRAZIL: Roraima: Mucajai municipality, RR-325, Vicinal Apiaú, Igarapé Serrinha (Sítio Vaca), 02°33’7.78”N / 61°18’45.06”W, 74 m a.s.l., 15 Dec. 2017, Pennsylvania light trap, J.L. Gama Neto leg. (alcohol; MPEG).GoogleMaps 

Paratype. 1 male, same data as holotype (alcohol; MPEG)GoogleMaps  .

Distribution: Brazil (Roraima, type locality only).

Etymology. The epithet “caboca”, a noun used in apposition, refers to the popular oral word used by the inhabitants of Roraima to designate any indigenous or non-indigenous person living in the countryside.


Museu Paraense Emilio Goeldi