Chimarra verticitas, 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 : 36

Chimarra verticitas sp. nov.

Figures 114–116

Holotype. Male (dried, pinned specimen CT-351 figured), PNG, Morobe Province, Wau , about 7° 20'S, 146° 43'E, Malaise Trap, 7 July 1964, J. Sedlacek ( BPBM).

Paratypes. PNG. 1 male (dried, pinned specimen CT-363), Morobe Province, Wau , 1250 m, about 7° 20' S, 146° 43' E, Malaise Trap, 30 August 1965, J. and M. Sedlacek ( BPBM) ; 1 male (dried, pinned specimen PT-1267), Wau , 1200 m, about 7° 20' S, 146° 43' E, Malaise Trap, 9 March 1965, J. and M. Sedlacek ( BPBM) .

Diagnosis. The males of C. verticitas can be separated from all other New Guinea species, in particular C. erecta , C. oláhi , C. aiyura Korboot and C. falcata Kimmins , by the combination of the shape of the lateral lobes of segment X, which are slightly laterally flattened and angled below the phallus as a pair of robust, tongue-shaped appendages and the inferior appendages which appear perpendicular and distally tapered, in lateral view.

Description. General body colour and wings brownish with golden head. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 6.2–7.0 mm. Forewing with forks 1, 2, 3 and 5 present, Rs slightly sinuous or curved, slightly thickened, basad of discoidal cell; hind wing with forks 1, 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, anteroventrally weakly angular (fig. 114), ventral process short, triangular, basal to distal margin of segment IX (figs 114, 115), in lateral view length about half basal width (fig. 114), preanal appendages, appear rounded in lateral view (fig. 114), angular in dorsal view (fig. 116). Segment X lateral lobes robust, apices narrowly rounded, situated below phallus with subapical spine (sensilla?; figs 114, 116), in lateral view appear tapered distally (fig. 114), in ventral view apices directed slightly mesally, nearly touching (fig. 115). Phallus dilated apically, with two slender spines included subapically (figs 114–116). Inferior appendages broadest in basal half, tapered gradually distally, slender in distal half, apices acute, directed dorsomesally (figs 114, 116), in lateral view appear directed perpendicularly, length about 3.2 times width, sub-triangular, dorsal margin mostly straight, ventral margin slightly concave and crenulate in basal half (fig. 114).

Female. Unknown.

Etymology. Verticitas – Latin for vertical direction (inferior appendages in lateral view).

Remarks. Chimarra verticitas is known from three male specimens from the Wau district in north-east PNG.

Figures

Figures 111–119. Chimarra spp.; 111–113, Chimarra lolakiana sp. nov., male, holotype, genitalia; 111, lateral; 112; ventral, 113, dorsal. 114–116, Chimarra verticas sp. nov., male, holotype, genitalia; 114, lateral; 115, ventral; 116, dorsal. 117–119, Chimarra antap sp. nov., male, holotype, genitalia; 117, lateral; 118, ventral; 119, dorsal.