Chimarra unidentata, 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 : 38

Chimarra unidentata sp. nov.

Figures 120–122

Holotype. Male (dried, pinned specimen CT-400 figured), PNG, Central Province, Kokoda, 400 m, about 8° 53' S, 147° 45' E, lt tr, 15– 20 November 1965, J. and M. Sedlacek ( BPBM).

Diagnosis. The male of C. unidentata can be separated from all other New Guinea species by the short inferior appendages, which are tapered distally and possess a prominent sub-apical mesal projection.

Description. General body colour and wings light brownish. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.2 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, moderately thickened, basad of discoidal cell; hind wing with forks 1, 2, 3 and 5 present.

Male genitalia. Segment IX anterior margin in lateral view, anteroventrally rounded (fig. 120), ventral process short, strongly basal to distal margin of segment IX (figs 120, 121), in lateral view shallow keel-like, length about 0.4–0.5 times basal width (fig. 120), in ventral view appears as narrow triangular shape (fig. 121), preanal appendages small, rounded in lateral view (fig. 120). Segment X lateral lobes robust basally, tapered distally, apices acute, sensilla not discerned (figs 120, 121), in lateral view apices angled posteroventrally below phallus (fig. 120). Phallus with two slender spines included subapically. Inferior appendages broadest near midlength, tapered slightly distally, apices narrowly rounded (figs 120–122), in lateral view angled horizontally, sub-ovate, length about 3.5 times width, dorsal margin mostly straight, ventral margin slightly convex (fig. 120), in ventral view mesal and lateral margins slightly curved, mesal margin subapically with acute triangular process (fig. 121).

Female. Unknown.

Etymology. Unidentata – Latin term for with (one) spike, tooth, toothed (inferior appendages).

Remarks. Chimarra unidentata is known from the type locality in south-east PNG.

Figures

Figures 120–128. Chimarra spp.; 120–122, Chimarra unidentata sp. nov., male, holotype, genitalia; 120, lateral; 121; ventral, 122, dorsal. 123– 125, Chimarra stellasp. nov., male, holotype, genitalia; 123, lateral; 124, ventral, 125, dorsal. 126–128, Chimarra aliceae sp. nov., male, holotype, genitalia; 126, lateral; 127, ventral; 128, dorsal.