Chimarra mendiana, 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 : 9

Chimarra mendiana sp. nov.

Figures 11–13

Holotype. Male (dried, pinned specimen, CT-403 figured), PNG (S Highlands Province), Mendi , 1660 m, lt tr, about 6° 10' S, 143° 40' E, 13 October 1958, T.C. Maa ( BPBM).

Diagnosis. The male of C. mendiana aligns with the C. papuana group (after Mey, 2006) and is most similar to C. bintang , sp. nov., C. papuana Kimmins , C. bobita Oláh , C. kalija Oláh and C. ukarumpana , sp. nov., because the elongate ventral process on segment IX exceeds the distal margin of segment IX. Chimarra mendiana differs from the other species, including C. papuana , because the apex of the dorso-apical projection of the inferior appendages is not dilated, as in C. bobita and C. ukarumpana ; in lateral view, the distal margin of the inferior appendages is less severely truncate than in C. papuana and C. ukarumpana , and more sharply angled than in C. bobita , C. kalija and C. bintang .

Description. General body colour and wings fawn. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.5 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, moderately thickened, basad of discoidal cell.

Male. Segment IX anterior margin in lateral view, with strong angular extension ventrally (fig. 11); ventral process a slender, rod-like, elongate projection, extending past distal margin of segment IX (figs 11, 12), in lateral view, very slightly dilated distally, length about 6.2 times width (fig. 11); preanal appendages small, ovoid (figs 11, 13). Segment X with pair of slender lateral lobes (hard to see in this specimen), closely adpressed to phallus (figs 12, 13), no sensilla visible (fig. 13). Phallus with one slender, elongate spine included near apex (figs 11–13). Inferior appendages robust, in lateral view, angled dorsally at about 75° to horizontal, proximally sub-rectangular, length about 1.6 times width, broadest in basal half, tapered basally and slightly distally (fig. 11), with long and slender dorso-subapical projection, with very slender apex with two short spines (figs 11–13), in ventral view with one small projection on inner margin (fig. 12).

Female. Unknown.

Etymology. Mendiana – named for the type locality (Mendi).

Remarks. The single male specimen of Chimarra mendiana is known from central PNG.

Figures

Figures 8–16. Chimarra spp.; 8–10, Chimarra ukarumpana sp. nov., male, holotype, genitalia; 8, lateral; 9, ventral; 10, dorsal. 11–13, Chimarra mendiana sp. nov., male, holotype, genitalia; 11, lateral; 12, ventral; 13, dorsal. 14–16, Chimarra bintang sp. nov., male, holotype, genitalia; 14, lateral; 15, ventral; 16, dorsal.