Chimarra stella, 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 : 38

Chimarra stella sp. nov.

Figures 123–125

Holotype. Male (dried, pinned specimen CT-340 figured), Indonesia, Papua Province, Star Range, 1300 m, about 5° 00' S, 141° 00' E, 28 June 1959, Leiden Museum, Netherlands, New Guinea exp. ( RMNH).

Diagnosis. The male of C. stella can be separated from all other New Guinea species, in particular C. goroca , by the combination of the pair of unique hooked spines partly embedded subapically in the phallus, the downturned lateral lobes of segment X and the sub-triangular inferior appendages, in lateral view.

Description. General body colour and wings fawn (faded). Wings similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.8 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, moderately thickened, basad of discoidal cell; hind wing with fork 1 apparently absent, forks 2, 3 and 5 present.

Male genitalia. Segment IX anterior margin in lateral view, with angular extension ventrally (fig. 123), ventral process on segment IX short, basal to distal margin of segment IX (figs 123, 124), in lateral view, broad, keel-like, length about 0.4 times basal width (fig. 123), in ventral view, slender (fig. 124), preanal appendages, in lateral view rounded (fig. 123), in dorsal view appear slender, apices acute (fig. 125). Segment X lateral lobes robust, tapered distally, apices broad, sub-truncate, sensilla not discerned (figs 123, 124), in lateral view directed posteroventrally (fig. 123), in ventral view, inner margin slightly concave, apices almost touching (fig. 124). Phallus with two spines partly included subapically and one elongate internal spine near midlength (figs 123–125), in lateral view subapical spines strongly hooked, acute apices project distally near apex of phallus (fig. 123). Inferior appendages broadest in basal half, tapered strongly distally, apices directed posteromesally, acute (figs 123–125), in lateral view angled at about 60° to horizontal, sub-triangular, length about twice width, dorsal margin slightly convex, ventral margin angled at right angles near base, narrowed near midlength, slightly concave in distal half (fig. 123), in ventral view, mesal and lateral margins slightly curved, slender in distal third (fig. 124).

Female. Unknown.

Etymology. Stella – Latin for star (named for the type locality).

Remarks. Chimarra stella is known from the type locality in eastern West Papua.

Figures

Figures 120–128. Chimarra spp.; 120–122, Chimarra unidentata sp. nov., male, holotype, genitalia; 120, lateral; 121; ventral, 122, dorsal. 123– 125, Chimarra stellasp. nov., male, holotype, genitalia; 123, lateral; 124, ventral, 125, dorsal. 126–128, Chimarra aliceae sp. nov., male, holotype, genitalia; 126, lateral; 127, ventral; 128, dorsal.