Chimarra cyclopica Kimmins, 1962

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 20

Chimarra cyclopica Kimmins, 1962

Figure 56

Chimarra cyclopica Kimmins, 1962 : figs 8, 9.—Neboiss, 1986: 108.

Type material not seen. Holotype. Male. Indonesia, Papua Province (formerly Dutch New Guinea), West Papua, Mount Cyclops , 3500 ft (1067 m), about 2° 31' S, 140° 31' E, March 1936, L.E. Cheeseman ( BMNH).

Material examined. 2 males (specimen in alcohol, CT-334 partly figured), PNG, Western Highlands Province, Pengi Creek, Bayer River Sanctuary, about 5° 19' S, 144° 11' E, lt tr, 16 June 1986, A. Wells ( NMV) ; 1 male (CT-376), Indonesia, (West Papua) Ifar ( Cyclops Mountains ), 300–600 m, about 2° 34' S, 140° 31' E, 22 June 1959, J.L. Gressitt ( BPBM) .

Diagnosis. The males of C. cyclopica can be separated from all other New Guinea species by the combination of the unique pair of elongate dorsal processes on the ninth segment and inferior appendages which are tapered distally, with slightly hooked, in-turned acute apices, in ventral view.

Description (revised after Kimmins, 1962). General body colour and wings brownish. Wings ( Kimmins, 1962: fig. 8) similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.0–4.4 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 ( Kimmins, 1962: fig. 8).

Male. Segment IX anterior margin rounded ventro-basally (fig. 56); ventral process a short, digiform projection, slightly basal to distal margin of segment IX (fig. 56; Kimmins, 1962: fig. 9D), in lateral view length about 1.5 times width, with rounded apex (fig. 56), in ventral view narrowly triangular, apically acute (fig. 9D; Kimmins, 1962), preanal appendages not discerned, but with pair of elongate dorsal processes ( Kimmins, 1962: fig. 9A, C), in lateral view dorsal processes slender distally, apices acute (fig. 56). Segment X with sensilla not obvious, lateral lobes robust, plate-like, laterad of and ventral to phallus (fig. 56; Kimmins, 1962: figs 9A, C). Phallus with one slender spine included subapically (fig. 56; Kimmins, 1962: fig. 9B). Inferior appendages robust, broadest in basal half, slightly tapered distally (fig. 56; Kimmins, 1962: fig. 9A, D), in lateral view angled at about 15° to horizontal, length about 2.5 times width, apices rounded (fig. 56) or slightly acute ( Kimmins, 1962: fig. 9A), in ventral view apices meso-distally directed, acute (fig. 56; Kimmins, 1962: fig. 9D).

Female. Unknown.

Remarks. Chimarra cyclopica is known from six male specimens from three disjunct localities on the island of New Guinea, from both northern Papua and central PNG. A new figure has been drawn to allow direct comparison and to accompany the description that is revised in light of new interpretations of Chimarra genitalic structures from Kimmins’ (1962) original description. The illustration shown here (fig. 56) differs slightly from that of the type specimen shown in Kimmins (1962; fig. 9A) in the shape of the posterior margin of segment IX and relative length and shape of tergum X, but I am confident that they are conspecific, particularly with the distinctive pair of elongate dorsal processes on the ninth segment.

Figures

Figures 53–59. Chimarra spp.; 53–55, Chimarra ediana sp. nov., male, holotype, genitalia; 53, lateral; 54, ventral; 55, dorsal. 56, Chimarra cyclopica Kimmins, male, genitalia; 56, lateral. 57–59, Chimarra cavata sp. nov., male, holotype, genitalia; 57, lateral; 58, ventral; 59, dorsal.