Chimarra supia, Cartwright, 2020

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 47

Chimarra supia sp. nov.

Figures 158–160

Holotype. Male (figured specimen CT-342), PNG, (Morobe Province), Wau , 1670 m, about 7° 20' S, 146° 43' E, March 1984, T. New ( NMV, T-22482).

Paratype. Male (CT-391), PNG, south-east, Milne Bay (about 10° 22' S, 150° 30' E), Malaise Trap, 14–23 February 1969, J. and M. Sedlacek ( BPBM) .

Diagnosis. Chimarra supia can be separated from all other New Guinea species by the combination of the spine-like ventral process on the phallus (or phallobase) and semicircular shaped inferior appendages in lateral view together with the shape of the lateral lobes of segment X, which are dilated sub-apically in dorsal view, similarly to C. bicuspidis and C. karimui .

Description. General body colour and wings pale to fawn (faded). Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.1–5.3 mm. Forewing with forks 1, 2, 3 and 5 present, Rs slightly sinuous or curved, slightly thickened, basad of discoidal cell.

Male. Segment IX anterior margin in lateral view, with broadly rounded extension ventrally (fig. 158), ventral process on segment IX, not obvious (figs 158, 159), preanal appendages sub-triangular in lateral and dorsal views (figs 158, 160). Segment X lateral lobes laterad of phallus, apices narrowly rounded, with sensilla not discerned (figs 158, 160), lateral lobes in lateral view appear tapered distally (fig. 158), in dorsal and ventral views with subapical, triangular barbs (figs 158, 160). Phallus with two small spines included subapically and a robust, partly emergent spine disto-ventrally (figs 158, 159). Inferior appendages robust, broadest near middle, tapered basally and distally, apices directed dorsomesally, subacute (figs 158–160), in lateral view appear semicircular, angled at about 45° to horizontal, length about 2.2 times width, dorsal margin almost straight and ventral margin strongly convex, slightly crenulate in distal half (fig. 158), in dorsal view lateral margins slightly curved (fig. 160).

Female. Unknown.

Etymology. Supia – New Guinea pidgin for spear (lateral lobes of segment X, in dorsal and ventral views).

Remarks. Chimarra supia is known from two male specimens from two localities in north-east and south-east PNG, separated by about 530 km in a straight line.

Figures

Figures 155–161. Chimarra spp.; 155–157, Chimarra maai sp. nov., male, holotype, genitalia; 155, lateral; 156, ventral; 157, dorsal. 158–160, Chimarra supia sp. nov., male, holotype, genitalia; 158, lateral; 159, ventral; 160, dorsal. 161–163, Chimarra ismayi sp. nov., male, holotype, genitalia; 161, lateral; 162, ventral; 163, dorsal.