Chimarra bintang, 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 : 9-10

Chimarra bintang sp. nov.

Figures 14–16

Holotype. Male (dried, pinned specimen, CT-339 figured), Indonesia, Papua Province (= West Papua), Star Range, Sibil , 1300 m, about 5° 00' S, 141° 00' E, 26 June 1959, Museum Leiden, Netherlands, New Guinea exp. ( RMNH).

Material examined. Indonesia. 1 male (dried, pinned specimen, CT-386, damaged), Papua Province, Star Range, Sibil Valley , 1245 m, about 5° 00' S, 141° 00' E, 18 October–8 November 1961?, S. and L. Quate ( BPBM) .

Diagnosis. The male of C. bintang aligns with the C. papuana group (after Mey, 2006) and is most similar to C. porsen Oláh , C. bobita Oláh , C. kalija Oláh , C. mendiana and C. ukarumpana in having the elongate ventral process on segment IX reach past the distal margin of segment IX. Chimarra bintang is most similar to C. porsen and C. mendiana in that in lateral view, the apex of the dorso-apical projection of the inferior appendages is not dilated as in C. bobita and C. ukarumpana . Chimarra bintang differs from C. porsen , C. kalija and C. ukarumpana in having the ventral process on segment IX slightly tapered distally in lateral view and the inferior appendages gradually tapered in distal third, with ventral margin almost irregularly convex.

Description. General body colour and wings fawn (faded). Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.6–5.7 mm. Forewing with forks 1, 2, 3 and 5 present, Rs slightly to moderately sinuous or curved, slightly to moderately thickened basad of discoidal cell; hind wing with forks 1, 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, with rounded extension ventrally (fig. 14); ventral process slender, rod-like, elongate, extending almost to distal margin of segment IX (figs 14, 15), in lateral view slightly tapered distally, length about 4.5 times width (fig. 14); preanal appendages small, rounded apically (figs 14, 16). Segment X with pair of slender lateral lobes, adpressed laterally to phallus (figs 14–16), with one pair of sensilla visible subapically (fig. 16). Phallus with one slender, elongate, spine included subapically (figs 14–16). Inferior appendages robust, in lateral view angled dorsally at about 45° to horizontal, sub-semicircular, length about 2.2 times width, broadest in middle, tapered gradually basally and apically, ventral margin irregularly convex (fig. 14), with long and slender dorso-subapical projection, with very slightly dilated apex bearing two short spines (figs 14–16), in ventral view with two small projections on mesal margin (fig. 15).

Female. Unknown.

Etymology. Bintang – Indonesian for star (locality Star Range).

Remarks. Only the two males (one damaged) of Chimarra bintang are known from the type locality in Papua.

Figures

Figures 8–16. Chimarra spp.; 8–10, Chimarra ukarumpana sp. nov., male, holotype, genitalia; 8, lateral; 9, ventral; 10, dorsal. 11–13, Chimarra mendiana sp. nov., male, holotype, genitalia; 11, lateral; 12, ventral; 13, dorsal. 14–16, Chimarra bintang sp. nov., male, holotype, genitalia; 14, lateral; 15, ventral; 16, dorsal.