Chimarra sedlaceki Sykora, 1967

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 23

Chimarra sedlaceki Sykora, 1967

Figures 70–71

Chimarra sedlaceki Sykora, 1967:588 , fig. 3.— Neboiss , 1986: 106.

Type material not seen. Holotype. Male. North-east New Guinea ( PNG), Wau, 1500 m (about 6° 20' S, 145° 53' E), at light, 10 October 1966, J. Illies (Bishop 7470).

Material examined. PNG. 1 male (dried, pinned specimen PT-1252 figured), Wau , Morobe District, 1200 m (7° 20' S, 146° 43' E), Malaise trap, 25 October 1965, J.M. Sedlacek ( BPBM) ; 1 male (dried, pinned specimen CT-713), Wau , Morobe District, 1250 m (7° 20'S, 146° 43'E), Malaise trap, 20 March 1965, J.M. Sedlacek ( BPBM) ; 2 males (CT-716; Western Highlands Province), Baiyer River Sanctuary, Trauna River , 5° 35' S, 144° 10' E, UV light, 17 June 1986, A. Wells ( NMV) ; 4 males, (Western Highlands Province), Baiyer River Sanctuary, Trauna River , 1160 m, 5° 30' S, 144° 10' E, UV light, 16 June 1986, A. Wells ( NMV) .

Diagnosis. The males of C. sedlaceki can be separated from all other New Guinea species, including C. pindua , C. aiyura and C. newguineana , by the combination of the slender, almost perpendicular inferior appendages, the lateral lobes of segment X with the out turned subapical flange and the short, apically rounded ventral process on segment IX.

Description (revised after Sykora, 1967). General body colour and wings light brown to brownish. Wings ( Sykora, 1967: fig. 3) similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.0– 7 mm. Forewings with forks 1, 2, 3 and 5 present, Rs slightly to moderately sinuous or curved, moderately thickened basad of discoidal cell, and fork 1 with short footstalk ( Sykora, 1967: fig. 3) or sessile (personal observation); hind wing with forks 1, 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, with rounded extension ventrally, ventral process short, basal to distal margin of segment IX, in lateral view, short, keel-shape, length about 1.2 times width (fig. 70; Sykora, 1967: fig. 3A), preanal appendages, relatively large, slightly laterally compressed (figs 70, 71), in lateral view appear rounded (fig. 70), in dorsal view appear elongate with rounded apices (fig. 71). Segment X lateral lobes situated slightly below phallus in distal third, slightly rounded apically, with sensilla not discerned (figs 70, 71), in lateral view, robust basally, narrowed in distal third (fig. 70), in dorsal view, with triangular flange subapically (fig. 71). Phallus with one or two short spines embedded subapically (figs 70, 71; Sykora, 1967: fig. 3D) and broadbased ventral projection (in lateral view, obscured by lateral lobe of segment X; fig. 70; Sykora, 1967: fig. 3A). Inferior appendages slender, broadest in basal third, narrowed slightly near middle, tapered slightly in distal half, with apices acute and directed posteromesally (figs 70, 71), in lateral view angled at about 75° to horizontal, length about 5 times width, dorsal margin almost straight and ventral margin slightly irregular in basal half, obtusely angled near middle and almost straight in distal half (fig. 70; Sykora, 1967: fig. 3A), in dorsal view, strongly angled near middle, mesal margin curved (fig. 71).

Female. Unknown.

Remarks. Chimarra sedlaceki is known from nine males from three localities in north-east PNG and two sites about 420 km west in the Western Highlands of PNG. New figures have been drawn to allow direct comparisons and to accompany the description that is revised in light of new interpretations of Chimarra genitalic structures from Sykora’s (1967) original description.

Figures

Figures 70–77.Chimarra spp.; 70–71, Chimarra sedlaceki Sykora, male, genitalia; 70, lateral; 71, dorsal. 72–74, Chimarra morobensis sp. nov., male, holotype, genitalia; 72, lateral; 73, ventral; 74, dorsal. 75–77, Chimarra damma sp. nov., male, holotype, genitalia; 75, lateral; 76, ventral; 77, dorsal.