Chimarra toliana, 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 : 14

Chimarra toliana sp. nov.

Figures 32–34

Holotype. Male (dried, pinned specimen CT-383 figured), Indonesia, Papua Province, Swart Valley (renamed Toli Valley ?), (1500 m?), about 3° 38' S, 138° 30' E, lt tr, 10 November 1958, J.L. Gressitt ( BPBM).

Diagnosis. The male of C. toliana is most similar to C. trigona but can be separated from it and all other New Guinea species by the distinctive dorso-ventrally constricted apices on the inferior appendages, appearing in lateral view as a slender point but robust and truncate in ventral and dorsal views.

Description. General body colour and wings light brownish. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.2 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, slightly thickened basad of discoidal cell.

Male. Segment IX anterior margin in lateral view, with angular extension ventrally (fig. 32); ventral process a short projection with apex about level with distal margin of segment IX, slightly tapered distally (figs 32, 33), in lateral view length about 2.7 times width (fig. 32), in ventral view triangular, distally acute (fig. 33); preanal appendages rounded apically (figs 32, 33). Segment X (damaged?) with a slender dorsal projection (fig. 32), lateral lobes platelike, adpressed to phallus, tapered to acute apices, two pairs of?conical sensilla obvious (fig. 34), in lateral view lateral lobes robust (fig. 32), in dorsal view lateral lobes slender (fig. 34). Phallus with one slender spine embedded subapically (fig. 32). Inferior appendages robust, tapered distally, apex dorso-ventrally flattened at least on left appendage, in lateral view appears slender, in ventral and dorsal views sub-truncate (right appendage slightly damaged; figs 32–34), in lateral view, angled at about 45° to horizontal, sub-triangular, length about 3 times width, ventral margin angled in basal half, dorsal margin almost straight (fig. 32), in ventral and dorsal views broadest in basal half, angled at about right angles basomesally, with irregularity or tooth on mesal margin (figs 33, 34).

Female. Unknown.

Etymology. Toliana – named after the type locality (Toli Valley, formerly the Swart Valley).

Remarks. Chimarra toliana is known only from the type locality in Indonesian Papua. The genitalia (inferior appendage only) of the holotype male is slightly damaged on the right side.

Figures

Figures 26–34. Chimarra spp.; 26–28, Chimarra cristata sp. nov., male, holotype, genitalia; 26, lateral; 27, ventral; 28, dorsal. 29–31, Chimarra projectura sp. nov., male, holotype, genitalia; 29, lateral; 30, ventral; 31, dorsal. 32–34, Chimarra toliana sp. nov., male, holotype, genitalia; 32, lateral; 33, ventral; 34, dorsal.