Chimarra karimui, 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 : 31

Chimarra karimui sp. nov.

Figures 95–97

Holotype. Male (dried, pinned specimen CT-388 figured), PNG, Western Highlands Province, Karimui (south-west of Goroka), about 6° 32' S, 144° 47' E, lt tr, 3 April 1963, J.L. and M. Gressitt ( BPBM).

Paratype. PNG. 1 male (dried, pinned specimen CT-373), Western Highlands Province, Karimui, south of Goroka , 1000 m, about 6° 32' S, 144° 47' E, lt tr, 2 June 1961, J.L. and M. Gressitt ( BPBM) .

Diagnosis. The males of C. karimui can be separated from all other New Guinea species, including C. sinuosa and C. wara , by a combination of features, including the lateral lobes of segment X, with apex laterally directed and acute with a small preapical process (possibly sensilla-bearing), and likely on the ventral margin and the inferior appendages, which are broad basally, tapered gradually and slender in the distal half with acute apices.

Description. General body colour and wings fawn to light brown. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.7–6.1 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately to strongly sinuous or curved, thickened, basad of discoidal cell.

Male. Segment IX anterior margin in lateral view, with narrowly rounded extension ventrally (fig. 95), ventral process short, basal to distal margin of segment IX (figs 95, 96), in lateral view sub-triangular, length about 0.6 times width, preanal appendages fused basally, rounded apically (fig. 95). Segment X lateral lobes with apex laterally directed and acute with a small preapical process (possibly sensilla-bearing), and likely on the ventral margin (figs 96, 97), in lateral view appears broad basally, narrowed near middle (fig. 95). Phallus with no included spines obvious. Inferior appendages broadest in basal half, tapered and slender distally, apices very acute, directed slightly posteromesally (figs 95–97), in lateral view, angled nearly vertically at about 80° to horizontal, length about 3 times maximum width, ventral margin angled strongly in basal third, dorsal and ventral margins curved in distal half (fig. 95), in dorsal and ventral views, mesal and lateral margins straight to very slightly curved in distal half (figs 96, 97).

Female. Unknown.

Etymology. Karimui – named for the type locality (Karimui).

Remarks. Chimarra karimui is known from two males from near the type locality in central PNG.

Figures

Figures 94–102. Chimarra spp.; 94, Chimarra sinuosa Kimmins, male, genitalia, lateral. 95–97, Chimarra karamui sp. nov., male, holotype, genitalia; 95, lateral; 96, ventral; 97, dorsal. 98–99, Chimarra laensis sp. nov., male, holotype, genitalia; 98, lateral; 99, dorsal. 100–102, Chimarra sappela sp. nov., male, holotype, genitalia; 100, lateral; 101, ventral; 102, dorsal.