Chimarra abacensis Johanson & Oláh, 2012, new species
Creators: name: Johanson, Kjell Arne
name: Oláh, János
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Philopotamidae
Chimarra
Chimarra abacensis

description: Chimarra abacensis, new species
Figs. 19, 100–104
In lateral view, the segment IX and the gonopods of C. abacensis resembles that of C. cakaudrivensis, from which it is distinguished by the less ventrally expanded basal part of each gonopod and much longer tergum X.
Male. Body brownish grey, dorsal part of meso- and metathorax pale brown. Dark area between lateral and anterior ocelli. Foreleg anterior claw as long as foreleg spur.
Wings (Fig. 19). Forewings 5.3 mm (n=1), brown; ratio of length to breadth 3.4; R1 nearly straight before crossvein r; radial sector slightly produced anterad immediately before discoidal cell; discoidal cell originating at mid-length of wing, 3x longer than wide; median cell slightly shorter than discoidal cell; crossvein r situated basally of R2; fork I originating before crossvein s at distance equal to length of crossvein s; nygma located near base of fork II; fork III 1 /6th as long as wing; fork V as long as fork I, shorter than fork II; Cu2 nearly touching from A at wing margin. Hind wings 4.2 mm (n=1), brown; broad, ratio of length to breadth 2.9; margin weakly incurved at arculus, where Cu1 and Cu2 fused with margin; fork I sessile on discoidal cell, about as long as fork V; fork III about 1.5x longer than discoidal cell and nearly 1/6th as long as wing; 1A+2A 4x longer than 1A.
Male genitalia (Figs. 100–104). Segment IX about as long as high; anterior plates narrowing anterad, pointed apically; posterior 1/2 of segment broad, expanded dorsally, parallelogram shaped, slightly produced dorsad (Fig. 100) and mesad (Fig. 101); each anterodorsal margin widely and deeply concave in lateral view; each ventral margin uniformly convex, without incisions; in lateral view, posterior part of segment IX produced posterad immediately below cercus, into narrow plate with nearly straight, undulating posterior margin; posterior plate with sharp posterodorsal corner. In dorsal view segment IX with long, narrow anterior lobes; in dorsal view anterodorsal margin forming deep, broad, U-shaped incision with anterodorsad orienting processes on posteromesal margins. In ventral view segment IX nearly rectangular, except slightly narrowing anteriorly and weakly convex lateral margins; anterior margin deeply concave; posterior margin slightly concave, with rounded central projection. Tergum X about as long as gonopods and undivided in lateral view; with slightly convex dorsal margin and concave ventral margin. In dorsal view tergum X divided from base into 2 parallel lateral branches, each with apex curved dorsolaterad. Sensillae on tergum X not visible. Cerci short, nearly wart-like, located near dorsal margin of segment IX and ventral margin of tergum X; broad in lateral view, narrow in dorsal view, directed posterad; covered by long setae. Gonopods shorter than segment IX in lateral view; posteriorly exceeding tergum X; with broad base; distal 1/2 about 1/2 as broad as basal 1/2, and slightly curved ventrad; in ventral view with ventromesal margin strongly undulating due to row of erect setal bases; dorsomesal margin smooth, strongly sigmoid, with minute, anteromesad-orienting, strongly sclerotized process. Phallic apparatus 1.5x longer than rest of genitalia, nearly straight, except bent ventrad at mid-length of posterior, slender part of phallotheca; phallotheca, in lateral view, with anterior part 3x thicker than posterior part; in ventral view anterior part 2x wider than posterior part; apicoventral spine absent on phallotheca; phallotremal sclerite formed by complex of cylindrical plates; 2 short, blackish endothecal spines present.
Female. Unknown.
Holotype male: VITI LEVU: Vuda Prov., Koroyanitu N.M.P. Abaca Village, Malaise trap, 6–26.v.2003, 17°40’S, 177°33’E [17.3333°S, 177.55°E], 400 m, leg. M. Irwin, E. Schlinger & M. Tokota’a [loc#01] [FNIC].
Paratypes: Same data as holotype [loc#01] — 1 male [BPBM]. Vuda Prov., Koroyanitu N.M.P., Savuione Trail, Malaise trap, 21.ix–7.x.2002, 17°40’S, 177°33’E [17.3333°S, 177.55°E], 450 m, M. Irwin, E. Schlinger & M. Tokota’a [loc#04] — 1 male [NHRS, DNA voucher IL 5].
Etymology: Abacensis, named after the Abaca village near the type locality.
Distribution: Viti Levu.
description: Published as part of Johanson, Kjell Arne & Oláh, János, 2012, Revision of the Fijian Chimarra (Trichoptera, Philopotamidae) with description of 24 new species, pp. 1-58 in Zootaxa 3354 on pages 34-36, DOI: 10.5281/zenodo.210736