Chimarra erecta, 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 : 33-35

Chimarra erecta sp. nov.

Figures 103–105

Holotype. Male (dried, pinned specimen CT-358 figured), PNG, Morobe Province, Wau , 1200 m, about 7° 20' S, 146° 43' E, Malaise trap, 7 July 1961, J. Sedlacek ( BPBM).

Diagnosis. The male of C. erecta can be separated from all other New Guinea species, particularly C. v erticitas, by the combination of the vertically directed inferior appendages, with acute apices directed dorsomesally and the lateral lobes of segment X, which are angularly bent on the dorsal margin in the basal half. Inferior appendages in lateral view are tapered weakly distally.

Description. General body colour and wings brownish. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.7 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, not 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. 103), ventral process short, basal to distal margin of segment IX (figs 103, 104), in lateral view, keel-like with rounded distal margin, length about half width (fig. 103), in ventral view, sub-triangular, apex acute (fig. 104), preanal appendages ovate (figs 103, 105). Segment X lateral lobes relatively long, aligned laterad alongside phallus, with no sensilla discerned (figs 103–105), in lateral view slightly tapered distally, apices appear slightly bulbous (fig. 103), in dorsal and ventral views, angularly bent on the dorsal margin in basal half, slender in distal half, apices appear slightly out turned (figs 104, 105). Phallus with two slender spines included subapically (figs 103–105). Inferior appendages broadest in basal half, slightly tapered in distal half, apices slender, acute, directed dorsomesally (figs 103, 105), in lateral view, perpendicular, length about 3.5 times width, dorsal margin weakly concave and ventral margin slightly convex (fig. 103), in ventral and dorsal views, mesal and lateral margins slightly curved (fig. 105).

Female. Unknown.

Etymology.Erecta – Latin for upright,erect (inferior appendages).

Remarks. Chimarra erecta is known from the type locality in north-east PNG.

Figures

Figures 103–110. Chimarra spp.; 103–105, Chimarra erecta sp. nov., male, holotype, genitalia; 103, lateral; 104, ventral; 105, dorsal. 106–107, Chimarra kokodana Kimmins, male, genitalia; 106, lateral; 107, dorsal. 108–110, Chimarra espelandae sp. nov., male, holotype, genitalia; 108, lateral; 109, ventral; 110, dorsal.