Chimarra sinuosa Kimmins, 1962

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 31

Chimarra sinuosa Kimmins, 1962

Figure 94

Chimarra sinuosa Kimmins, 1962: 118 ; figs 21, 22.—Neboiss, 1986: 105.

Type material not seen. Holotype. Male. Indonesia, Papua Province, Cyclops Mountains, Sabron, Camp 2, 2000 ft (about 610 m), July 1936, L.E. Cheesman ( BMNH).

Material examined. Indonesia. 1 male (dried, pinned specimen CT-381 partly figured), Papua Province, Hollandia area, Sentani , 90 m, about 2° 36' S, 140° 37' E, Malaise trap over stream, 15–18 June 1959, collector unknown (Gressitt or Maa?; BPBM) .

Diagnosis. The males of C. sinuosa are similar to C. bifida in the sinusoidal shape of the inferior appendages, and to C. kewabi in the shape of the lateral lobes of segment X, with two subapical projections (sensillae?) in lateral view. C. sinuosa can be separated from C. bifida and C. kewabi and all other New Guinea species by the combination of these two characters and inferior appendages with simple, acute, inflexed apices.

Description. (Revised after Kimmins, 1962). General body colour and wings light brownish. Wings ( Kimmins, 1962: fig. 21), similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.7 mm ( Kimmins, 1962: p. 118). Forewing with forks 1, 2, 3 and 5 present, Rs slightly sinuous or curved, moderately thickened, basad of discoidal cell ( Kimmins, 1962: fig. 21); hind wing with forks 1, 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, anteroventrally broadly rounded (fig. 94), ventral process short triangular ( Kimmins, 1962: fig. 22A), basal to distal margin of segment IX, in lateral view, length about 0.6 times basal width (fig. 94), preanal appendages ovate. Segment X lateral lobes with two subapical projections (sensilla?; fig. 94, Kimmins, 1962: figs 22A, B), in lateral view, lateral lobes robust, broadest in basal half, narrowed in distal half. Phallus without any obvious included spines. Inferior appendages slender, broadest basally, with acute apices directed posteromesally (fig. 94, Kimmins, 1962: figs 22A, B), in lateral view angled at about 45° to horizontal, slightly tapering in basal half, almost uniformly narrow and sinusously curved in apical half (fig. 94), in dorsal view, mesal and lateral margins curved ( Kimmins, 1962: figs 22B, C; Neboiss, 1986a: fig. p. 105).

Female. Unknown.

Remarks. Chimarra sinuosa is known only from two male specimens from two localities in the north-east of West Papua. A new figure has been drawn to allow direct comparisons and to accompany the description that is revised in light of new interpretations of Chimarra genitalic structures from Kimmins’ (1962) original description.

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.