Chimarra pindua, 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 : 23

Chimarra pindua sp. nov.

Figures 66–69

Holotype. Male (dried, pinned specimen CT-366 figured), PNG: north-east, Morobe Province, Wau , 1250 m, about 7° 20' S, 146° 43' E, Malaise trap, 11 August 1965, J. and M. Sedlacek ( BPBM).

Diagnosis. The male of C. pindua , together with some other species, have forewings with a small clear, depressed area or window basal to the discoidal cell; the New Guinea species C. formosa Botosaneanu and de Vos has a larger, pale hyaline area in both the forewings and the hind wings. The genitalia of C. pindua differs from C. formosa in that the inferior appendages are slender in C. pindua . It most closely resembles C. sedlaceki Sykora (fig. 70) in the shape of the inferior appendages in lateral view, but differs in that in lateral view the inferior appendages are slightly more robust, the phallus is slightly tapered apically and the lateral lobes of segment X are situated slightly more dorsally with respect to the phallus.

Description. General body colour and wings brownish. Wings similar to C. ukarumpana (fig. 7). Length of forewing: male 6.0 mm. Forewing with forks 1, 2, 3 and 5 present, small, clear window basad of discoidal cell, and Rs sinuous or curved, moderately thickened, basad of discoidal cell (fig. 69).

Male. Segment IX anterior margin in lateral view, anteroventrally rounded, ventral process short (figs 66, 67), in lateral view keel-like, length about 1.2–1.3 times width, rounded apically (fig. 66); preanal appendages small and rounded apically (figs 66, 68). Segment X with a pair of robust lateral lobes, sensilla not discerned (figs 66, 68), in lateral view lateral lobes rounded apically (fig. 66), in dorsal and ventral views, appear dilated or flanged subapically (figs 67, 68). Phallus slightly laterally compressed apically with no obvious included spines (figs 66–68), in lateral view appears rounded apically (fig. 66), in dorsal and ventral views appears tapered distally and acute apically (figs 67, 68). Inferior appendages tapered distally, with apices directed posteromesally (figs 66– 68), nearly meeting dorsal to phallus (fig. 68), in lateral view, angled at about 60° to horizontal, length about 4.5 times width, broadest near middle, ventral margin irregular (fig. 66).

Female. Unknown.

Etymology. Pindua – New Guinea pidgin for window (small, clear window in forewings).

Remarks. Chimarra pindua is known only from the holotype male from eastern PNG.

Figures

Figures 60–69. Chimarra spp.; 60–62, Chimarra clava sp. nov., male, holotype, genitalia; 60, lateral; 61, ventral; 62, dorsal. 63–65, Chimarra newguineana sp. nov., male, holotype, genitalia; 63, lateral; 64, ventral; 65, dorsal. 66–69, Chimarra pindua sp. nov., male, holotype, 66–68, genitalia; 66, lateral; 67, ventral; 68, dorsal; 69, forewing.