Chimarra clava

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 21

Chimarra clava sp. nov.

Figures 60–62

Holotype. Male (dried, pinned specimen CT-361 figured), PNG, Morobe Province, Wau, Hospital Creek , 1230 m, about 7° 20' S, 146° 43' E, 16 June 1965, J. Sedlacek ( BPBM).

Paratypes. PNG, 1 male, Morobe Province, Wau , 1200 m, about 7° 20' S, 146° 43' E, Malaise Trap, 8 July 1961, J. and M. Sedlacek ( BPBM) ; 1 male (PT-1241), same locality and collector, 1 December 1965 ( BPBM) ; 1 male (PT-1266), same locality, 14 February 1963, J. Sedlacek ( BPBM) ; 1 male, Morobe Province, Wau, Big Wau Creek , 1300 m, about 7° 20' S, 146° 43' E, Malaise Trap, November 1965, J. Sedlacek ( BPBM) .

Diagnosis. The males of C. clava are similar to those of C. harpes sp. nov. and C. longpela Cartwright , the three species all having inferior appendages elongate and club-like in lateral view, a feature that separates them from all other New Guinea species. Chimarra clava differs from C. harpes in that the inferior appendages are not slightly dilated in the distal third and lack the meso-apical projection and distinctive elongate embedded phallic spine. Chimarra clava can be distinguished from C. longpela in that the inferior appendages are less elongate and the ventral process on the IX segment is obvious.

Description. General body colour and wings light brown to brownish. Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.9–5.1 mm. Forewing with forks 1, 2, 3 and 5 present, Rs slightly to moderately sinuous or curved, slightly thickened basad of discoidal cell.

Male. Segment VIII ventral process dorso-ventrally flattened, apex acute (figs 60, 61), in lateral view slender (fig. 60), in ventral view broadbased, triangular (fig. 61). Segment IX anterior margin in lateral view, with acute angular extension ventrally (fig. 60), ventral process short with rounded apex, nearly level with distal margin of segment IX (figs 60, 61), in lateral view length about 1.5–1.6 times width (fig. 60), in ventral view partly obscured by segment VIII ventral process (fig. 61); preanal appendages in lateral view, appear digiform with narrowly rounded apices (fig. 60), in dorsal view, appear sub-triangular (fig. 66). Segment X lateral lobes laterad of phallus and hard to discern, with sensilla not discerned (figs 60, 62). Phallus with two slender spines embedded subapically (figs 60–62). Inferior appendages robust, elongate, apices incurved (figs 60, 61), in lateral view angled at about 30° to horizontal, length about5.5 times width, ventral and dorsal margins mostly straight and parallel, apices appear broadly rounded (fig. 60), in ventral and dorsal views mesal and lateral margins mostly straight and parallel in basal two thirds, tapered in distal third with apices acute (figs 61, 62).

Female. Unknown.

Etymology. Clava – Latin for club, cudgel (inferior appendages).

Remarks. Chimarra clava is known from five males collected from the Wau district in eastern PNG.

Figures

Figures 60–69. Chimarra spp.; 60–62, Chimarra clava sp. nov., male, holotype, genitalia; 60, lateral; 61, ventral; 62, dorsal. 63–65, Chimarra newguineana sp. nov., male, holotype, genitalia; 63, lateral; 64, ventral; 65, dorsal. 66–69, Chimarra pindua sp. nov., male, holotype, 66–68, genitalia; 66, lateral; 67, ventral; 68, dorsal; 69, forewing.