Chimarra veveensis, Johanson, Kjell Arne & Espeland, Marianne, 2010

Johanson, Kjell Arne & Espeland, Marianne, 2010, Description of new Chimarra (Trichoptera: Philopotamidae) species from the Solomon Islands, Zootaxa 2638, pp. 25-43 : 32-33

Chimarra veveensis , new species

Figs 4 , 21–25

Diagnosis: The genitalia of C. veveensis are generally very long and slender, i.e. with strongly anteriorly produced ventral part of segment IX, the long and very slender inferior appendages, and slender phallic apparatus. In the Australian Region this combination of characteristics is only found in C. kolombangensis from the Solomon Islands (below). Chimarra veveensis is distinguished from C. kolombangensis by the genitalia in lateral view, particularly in segment IX the anterior part is broader, and in the more slender inferior appendages and the phallic apparatus and the phallotremal sclerite complex all being more slender, the more slender phallic apparatus, and the slender phallotremal sclerite complex.

Description: Wings ( Fig. 4 ): Forewings each 4.2 mm long, membrane uniformly pale grey; veins pale brown. Hind wings each 3.4 mm long, membrane uniformly pale grey; veins brown.

Male Genitalia ( Figs 21–25 ): Segment IX very longwith anteroventral region greatly produced ( Fig. 21 ); anterodorsal margins concave, angled; ventral margin nearly straight in lateral view, without ventral process ( Fig. 21 ); posterior margins nearly straight, each with small rounded protrusion above inferior appendage; setae restricted to posterior margins below mid-height; in ventral view ( Fig. 23 ) with undulating, nearly parallel-sided lateral margins and evenly concave posterior margin, anterior margin deeply concave; in dorsal view ( Fig. 22 ) slightly widening posteriorly, lateral margins pointed anteriorly, tergite anteriorly deeply concave, U-shaped; Ventral process absent ( Fig. 21 ); tergite IX much shorter than sternite, with minute, triangular dorsal process near base of tergum X. Anterior apodemes absent. Preanal appendages located basally on tergum X, about 0.05 mm long, directed posterad; rounded in lateral and dorsal views ( Figs 21, 22 ). Tergum X about half as long as inferior appendages, without setae, formed by pair of ventrad-curving lateral lobes separated from base of tergum X; nearly parallel-sided in lateral view ( Fig. 21 ); in dorsal view narrowing from base to mid-length, nearly parallel-sided from mid-length; each lateral lobe with apex obliquely truncate, longerlocated laterally. Inferior appendages nearly straight along their length; basal plate compact, short ( Fig. 21 ); basal 1/4th of inferior appendages slightly wider than distal three-quarters; each inferior appendage parallel-sided from distal half in lateral view; in ventral view ( Fig. 23 ) inferior appendages sub-parallel, each inferior appendage with broad meso-basal plate with right-angled posteromesal corner; appendage sharply narrower beyond this plate, with slightly mesad-curving apex. Sclerotized portion of phallic apparatus long, slender, phallotheca nearly cylindrical from 2/5ths its length in lateral and ventral views ( Figs 24, 25 ); phallobase about twice as thick as rest of phallotheca in lateral and ventral views; posteroventral margin of phallotheca produced into short horizontal spine. Phallotremal sclerite complex with small, slender processes in lateral view; not observed in ventral view; endotheca without micro-spines, but with pair of short,subequal, curved, asymmetrically positioned spines in retracted phallotheca.

Holotype male: Solomon Islands: Western Province, Kolombangara Island, N slope of Mt. Veve, 2.5 km S end of road L 57, 723 m, loc 11, 7 °55.494'S 157°02.986'E, light trap, 12.i.2008 [M Espeland].

Paratypes: Solomon Islands: 2 males, Western Province, Kolombangara Island, N slope Mt. Veve, 0.5 km S of road L 57, 451 m, loc. 13, 7 °54.872'S 157°03.146'E, light trap, 13.i.2008 [M Espeland].

Etymology. Veveensis , from Mt. Veve, the type locality of the species.

Figures

FIGURES 2 – 10. Right forewing and hind wing of holotypes of new Chimarra species. 2 — C. maculata, new species; 3 — C. talinensis, new species; 4 — C. veveensis, new species; 5 — C. kolombangensis, new species; 6 — C. babarensis, new species; 7 — C. vitapinensis, new species; 8 — C. ventrospina, new species; 9 — C. solomonensis, new species; 10 — C. rosavensis, new species.

FIGURES 21 – 25. Chimarra veveensis, new species, holotype, male. 21 — genitalia, left lateral; 22 — genitalia, dorsal; 23 — genitalia, ventral; 24 — phallic apparatus, left lateral; 25 — phallic apparatus, ventral.