Chimarra sappela, 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 : 33

Chimarra sappela sp. nov.

Figures 100–102

Holotype. Male (dried, pinned specimen CT-392 figured), PNG, Morobe District, Wau , 1200 m, about 7° 20' S, 146° 43' E, 7 July 1961, J. Sedlacek ( BPBM).

Diagnosis. The male of C. sappela can be separated from all other New Guinea species, including C. morobensis , by the combination of the robust pincer-like inferior appendages with almost straight ventral margin, tapered in distal half, with acute apices angled meso-distally, plus the slender, hooked ventral lateral lobes of segment X, situated below the phallus in lateral view.

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

Male. Segment IX anterior margin in lateral view, anteroventrally angular (fig. 100), ventral process short, basal to distal margin of segment IX (figs 100, 101), in lateral view, keel-like with rounded distal margin, length about half width, preanal appendages ovate (figs 100, 102). Segment X lateral lobes with sensilla not discerned (fig. 102), dorsal lateral lobes relatively long, situated slightly above phallus (fig. 100), in dorsal view lobes elongate, triangular (fig. 102), ventral lateral lobes short, slender, hooked, apices angled downwards below phallus (fig. 100). Phallus with one slender spine included subapically (figs 100–102). Inferior appendages broadest in basal half, tapered in distal half to acute apices directed posteromesally (figs 100–102), in lateral view, angled at about 30° to horizontal, length about 3.7 times width, dorsal margin slightly concave in distal half and ventral margin mostly straight (fig. 100), in ventral and dorsal views, mesal and lateral margins slightly curved (figs 101, 102).

Female. Unknown.

Etymology. Sappela – New Guinea Pidgin for sharp (apices of inferior appendages).

Remarks. Chimarra sappela is known from the type locality in north-east PNG.

Figures

Figures 94–102. Chimarra spp.; 94, Chimarra sinuosa Kimmins, male, genitalia, lateral. 95–97, Chimarra karamui sp. nov., male, holotype, genitalia; 95, lateral; 96, ventral; 97, dorsal. 98–99, Chimarra laensis sp. nov., male, holotype, genitalia; 98, lateral; 99, dorsal. 100–102, Chimarra sappela sp. nov., male, holotype, genitalia; 100, lateral; 101, ventral; 102, dorsal.