Chimarra wauana, 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 : 10

Chimarra wauana sp. nov.

Figures 17–19

Holotype. Male (dried, pinned specimen, CT-367 figured), PNG, Morobe Province, Wau , 1700 m, about 7° 20' S, 146° 43' E, Malaise Trap, 23 July 1965, J. and M. Sedlacek ( BPBM).

Paratypes. PNG. 1 male (dried, pinned specimen, CT-368), same locality and collector as holotype, 30 July 1965 ( BPBM) ; 1 male (dried, pinned specimen, CT-406), same locality and collector as holotype, 1750 m, 16 August 1965 ( BPBM) ; 1 male (PT-1240), same locality and collector, 1750 m, 27 September 1965 ( BPBM) .

Material examined: PNG. 1 male (CT-402), Central Province , Mount Albert Edward, 2820 m, about 8° 20' S, 147° 30' E, Malaise Trap, 10 November 1965, J. Sedlacek ( BPBM) .

Diagnosis. The males of C. wauana can be separated from all other New Guinea species by the dorso-ventrally flattened ventral process on segment IX and, in lateral view, sub-parallelogram shaped inferior appendages, with both dorsal and ventral margins straight and parallel for much of their length.

Description. General body colour and wings light brown to brownish. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.0–5.4 mm. Forewing with forks 1, 2, 3 and 5 present, Rs straight or slightly sinuous or curved, not thickened basad of discoidal cell; hind wing with forks 1, 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, with strong angular extension ventrally and minute extension dorsally (fig. 17); ventral process a dorso-ventrally flattened projection, width in ventral view about 6 times width in lateral view (figs 17, 18), in lateral view, length about 11 times width (fig. 17), preanal appendages relatively large, truncate apically. Segment X lateral lobes laterad of phallus, laterally compressed or plate-like, with sensilla not discerned (figs 17, 19), in lateral view robust, downturned slightly apically to broadly rounded apices (fig. 17), in dorsal and ventral views appear slender and slightly out turned apically (figs 18, 19). Phallus with two slender spines included subapically (figs 17–19). Inferior appendages robust, with apices acute, posteromesally directed (figs 17–19), in lateral view angled dorsally at about 45° to horizontal, sub-parallelogram, dorsal and ventral margins mostly parallel, length about 3 times width, tapered gradually in basal quarter (fig. 17), in ventral and dorsal views, with curved lateral margins, tapered distally (figs 18, 19).

Female. Unknown.

Etymology. Wauana – named for type locality (Wau).

Remarks. Five male specimens of Chimarra wauana are known from two higher altitude localities in the Morobe and Central Provinces of PNG; these sites are separated by about 150 km.

Figures

Figures 17–25. Chimarra spp.; 17–19, Chimarra wauana sp. nov., male, holotype, genitalia; 17, lateral; 18, ventral; 19, dorsal. 20–22, Chimarra jari sp. nov., male, holotype, genitalia; 20, lateral; 21, ventral; 22, dorsal. 23–25, Chimarra johansoni sp. nov., male, holotype, genitalia; 23, lateral; 24, ventral; 25, dorsal.