Chimarra missim, 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 : 42

Chimarra missim sp. nov.

Figures 137–139

Holotype. Male (dried, pinned specimen PT-1248 figured), PNG, Morobe Province, near Wau, Mount Missim , 1200 m, 7° 15' S, 146° 48' E, Malaise trap, 27 May 1966, J.L. Gressitt ( BPBM).

Paratypes. PNG. 2 males (dried, pinned specimens PT-1247, 1249), collected with holotype ( BPBM) .

Diagnosis. Chimarra missim can be separated from other New Guinea species, particularly C. denticulata , by the inferior appendages which have a broadly crenulate mesal margin in lateral view and laterally compressed, slightly downturned lateral processes on segment X.

Description. General body colour and wings light brown. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.2–5.4 mm. Forewing with forks 1, 2, 3 and 5 present, Rs slightly 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 rounded (fig. 137), ventral process on segment IX basal to distal margin of segment IX (figs 137, 138), in lateral view weakly keel-like, length about 0.25 times basal width.Preanal appendages relatively large, laterally compressed (figs 137, 139), in lateral view rounded (fig. 137), in dorsal view appear digitiform (fig. 139). Segment X lateral lobes aligned alongside phallus, robust, laterally compressed, with sensilla not discerned (figs 137, 139), in lateral view tapered in distal quarter, angled posteroventrally (fig. 137). Phallus without any obvious included spines (figs 137–139). Inferior appendages elongate, apices acute, angled posteromesally (figs 137, 138), in lateral view angled at about 30° to horizontal, broadest in basal half, tapered slightly distally, length about 3.5 times width with dorsal margin slightly concave, ventral margin widely crenulate (fig. 137), in ventral view lateral and mesal margins curved (fig. 138).

Female. Unknown.

Etymology. Missim – named for the type locality (Mount Missim).

Remarks. Chimarra missim is known from three males collected from the type locality in north-east PNG.

Figures

Figures 137–145. Chimarra spp.; 137–139, Chimarra missim sp. nov., male, holotype, genitalia; 137, lateral; 138, ventral; 139, dorsal. 140–142, Chimarra denticulata sp. nov., male, holotype, genitalia; 140, lateral; 141, ventral; 142, dorsal. 143–145, Chimarra sepikana, male, holotype, genitalia; 143, lateral; 144, ventral; 145, dorsal.