Chimarra harpes, 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 : 14-16

Chimarra harpes sp. nov.

Figures 38–40

Holotype. Male (specimen in alcohol, CT-336 figured), PNG, (? Central Province), locality and collector (A. Wells?) unknown (NMV, T-22453).

Paratypes. PNG. 2 males, collected with holotype ( NMV) .

Diagnosis. The males of C. harpes are most similar to C. clava and C. longpela Cartwright in the elongate shape of the inferior appendages but can be separated from those and all other New Guinea species by small differences in the inferior appendages, which in lateral view, are elongate and slightly dilated in the distal third, with a meso-apical projection and a distinctive elongate embedded phallic spine, not found in any other New Guinea Chimarra species.

Description. General body colour and wings pale (faded). Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 3.8–4.1 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 rounded extension ventrally (fig. 38), ventral process in lateral view short, apically close to length of distal margin of segment IX (figs 38, 39), length about 2.5 times width, slightly rounded distally (fig. 38), in ventral view narrowly triangular, distally acute (fig. 39); preanal appendages in dorsal view appear rounded (fig. 40), in lateral view appear sub-quadrate (fig. 38). Segment X with one pair of sensilla visible (fig. 40), in lateral view lateral lobes robust, apically truncate, with short ventrally directed digitiform process at apico-ventral angle (fig. 38), in dorsal view lateral lobes difficult to discern, aligned laterally to phallus, apices rounded (fig. 40). Phallus with a slender, elongate embedded spine (figs 38, 40) and a second shorter spine basally (fig. 40). Inferior appendages elongate, slightly laterally flattened, sword-shaped (figs 38–40), in lateral view aligned nearly horizontally, length about 5 times width, appears club-like, slightly dilated in distal third, apices broadly rounded (fig. 38), in ventral and dorsal views with slender meso-apical projection (figs 39, 40).

Female. Unknown.

Etymology. Harpes – Latin for curved sword or scimitar (shape of inferior appendages in lateral view).

Remarks. Chimarra harpes is known from three males from one (unknown?) locality in eastern PNG.

Figures

Figures 35–43. Chimarra spp.; 35–37, Chimarra trigona sp. nov., male, holotype, genitalia; 35, lateral; 36, ventral; 37, dorsal. 38–40, Chimarra harpes sp. nov., male, holotype, genitalia; 38, lateral; 39, ventral; 40, dorsal. 41–43, Chimarra milneana sp. nov., male, holotype, genitalia; 41, lateral; 42, ventral; 43, dorsal.