Chimarra johansoni, 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 : 12

Chimarra johansoni sp. nov.

Figures 23–25

Holotype. Male (dried, pinned specimen, CT-407 figured), PNG, Morobe Province, Wau , 1400 m, about 7° 20' S, 146° 43' E, banana yeast bait, 18 February 1972, J.L. Gressitt ( BPBM).

Diagnosis. The male of C. johansoni is similar to C. toliana , sp. nov. and C. trigona , sp. nov. in some genitalic characters, such as the shape of the inferior appendages and ventral process of segment IX, in lateral view. C. johansoni can be separated from the other two species by the presence of a subapical projection on the inferior appendages, which is truncate in lateral view and finger-like in ventral and dorsal views.

Description. General body colour and wings pale (faded). Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.6 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, strongly thickened, basad of discoidal cell.

Male. Segment IX anterior margin in lateral view, with elongate angular extension ventrally (fig. 23), ventral process forming rod-like projection extending almost to distal margin of segment IX (figs 23, 24), in lateral view length about 4 times width, dilated slightly distally (fig. 23), in ventral view slightly rounded apically (fig. 24); preanal appendages small, rounded apically (figs 23, 25). Segment X lateral lobes hard to discern, laterad of phallus (figs 23, 25), in lateral view, robust, apices rounded fig. 23), in dorsal view, closely adpressed to phallus (fig. 25). Phallus with two slender spines included near middle (fig. 23). Inferior appendages robust, in lateral view, angled at about 60° to horizontal, length about 2.8 times width, broadest in basal half, narrowed strongly near one-third length, almost parallel sided in distal half, tapered gradually distally, subapical projection appears truncate (fig. 23), in ventral and dorsal views, broadest in basal half, mesal margin angular near middle, subapical projection digitiform, angled posteromesally (figs 24, 25).

Female. Unknown.

Etymology. Named for Kjell Arne Johanson for his contribution to the study of Chimarra in the south-west Pacific region.

Remarks. Chimarra johansoni is known only from the holotype male from the type locality in eastern PNG.

Figures

Figures 17–25. Chimarra spp.; 17–19, Chimarra wauana sp. nov., male, holotype, genitalia; 17, lateral; 18, ventral; 19, dorsal. 20–22, Chimarra jari sp. nov., male, holotype, genitalia; 20, lateral; 21, ventral; 22, dorsal. 23–25, Chimarra johansoni sp. nov., male, holotype, genitalia; 23, lateral; 24, ventral; 25, dorsal.