Chimarra ediana, 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 : 18-20

Chimarra ediana sp. nov.

Figures 53–55

Holotype. Male (dried specimen, CT-374 figured), PNG, Morobe Province, Edia (-e) Creek , (15 km south-west of) Wau , 200 m, about 7° 19' S, 146° 41' E, Malaise Trap, 5–11 October 1961, J. Sedlacek ( BPBM).

Diagnosis. The male of C. ediana can be separated from all other New Guinea species, including C. wara and C. gressetti Sykora , by the combination of small differences in the shape of the inferior appendages, which are broad basally, tapered strongly in distal half and in lateral view have the ventral margin concave in the distal half and a 90° angle basal to the concavity.

Description. General body colour and wings fawn. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.8 mm. Forewing with forks 1, 2, 3 and 5 present, Rs sinuous or curved, thickened, basad of discoidal cell.

Male. Segment IX anterior margin in lateral view, with weak angular extension ventrally, ventral process short, triangular, apically acute, arising near base of segment IX, in lateral view length about twice width (fig. 53); preanal appendages rounded apically (figs 53, 54), in lateral view slightly ovoid (fig. 53). Segment X lateral lobes laterad of or straddle phallus, laterally compressed, with sensilla not discerned (fig. 55), in lateral view, lobes appear sub-rectangular (fig. 54), in dorsal view lateral lobes appear very slender in distal half (fig. 55). Phallus with two slender spines embedded subapically (figs 53–55). Inferior appendages robust, broadest in basal half, narrowed forming a 90° angle near two-thirds length, tapered strongly in distal third, apical spine directed mesally (figs 53, 54), in lateral view angled at about 30° to horizontal, length about 2.4 times width, ventral margin with slight concavity in distal half, dorsal margin almost straight (fig. 53), in ventral view mesal margin angled at about 90° near mid length (fig. 54).

Female. Unknown.

Etymology. Ediana – named for the type locality (Edia Creek).

Remarks. Chimarra ediana is known only from the holotype male north-east PNG.

Figures

Figures 53–59. Chimarra spp.; 53–55, Chimarra ediana sp. nov., male, holotype, genitalia; 53, lateral; 54, ventral; 55, dorsal. 56, Chimarra cyclopica Kimmins, male, genitalia; 56, lateral. 57–59, Chimarra cavata sp. nov., male, holotype, genitalia; 57, lateral; 58, ventral; 59, dorsal.