Chimarra goroca Sykora, 1967

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 40-42

Chimarra goroca Sykora, 1967

Figures 132, 133

Chimarra goroca Sykora, 1967: 589 ; fig. 4.—Neboiss, 1986: 106.

Type material not seen. Holotype. Male , PNG, north-east, Goroka, Omaheka River, 2200 m, 28 September 1966, J. Illies (BPBM, Type 7471).

Material examined. 1 male (dried, pinned specimen CT-389, partly figured), PNG, Southern Highlands Province, ridge west of Dimifa, south of Mount Giluwe , 2350 m, about 6° 02' S, 143° 51' E, 11 October 1958, J.L. Gressitt ( BPBM) .

Diagnosis. Chimarra goroca can be separated from other New Guinea species particularly C. stella , by the combination of the spatulate lateral lobes of segment X and inferior appendages that are broad-based and sub-triangular, the broad-based keel-like ventral process on segment IX, in lateral view and the absence of a pair of large, hooked spines partly embedded subapically in the phallus.

Description. (Revised after Sykora, 1967). General body colour and wings light yellowish ( Sykora 1967) to brownish. Wings ( Sykora, 1967: fig. 4), similar to those of C. ukarumpana (fig. 7). Length of forewing: male 5.5–7.0 mm. Forewing with forks 1, 2, 3 and 5 present, Rs straight to slightly sinuous or curved, thickened, basad of discoidal cell; hind wing with forks 1, 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, anteroventrally angular (fig. 132; Sykora 1967: fig. 4A), in lateral view, ventral process on segment IX broad-based, keel-like, length about 0.25 times basal width. Preanal appendages rounded (fig. 132; Sykora, 1967: fig. 4A; Neboiss, 1986a: fig. p. 106). Segment X lateral lobes angled posteromesally, spatulate, apices rounded, with sensilla not discerned (figs 132, 133; Sykora, 1967: fig. 4A; Neboiss, 1986a: fig. p. 106), in lateral view sub-quadrate, angled at about 45° posteroventrally, apices below phallus (fig. 132; Sykora, 1967: fig. 4A; Neboiss, 1986a: fig. p. 106). Phallus with two small, hooked, internal spines subapically (figs 132, 133) and an elongate spine more basally ( Sykora, 1967: fig. 4E; Neboiss, 1986a: fig. p. 106). Inferior appendages tapered slightly in distal third, apices angled posteromesally, acute (figs 132, 133; Sykora, 1967: figs 4A–C; Neboiss, 1986a: fig. p. 106), in lateral view appear sub-triangular, broad-based, angled at about 45° to horizontal, length about 2.3 times width (fig. 132; Sykora, 1967: fig. 4A).

Female. Unknown.

Remarks. Chimarra goroca is known from two males from two sites in central and north-east PNG, with both males collected at relatively high altitudes. New figures have been drawn to allow direct comparisons and to accompany the description that is revised in light of new interpretations of Chimarra genitalic structures from Sykora’s (1967) original description.

Figures

Figures 129–136. Chimarra spp.; 129–131, Chimarra wara sp. nov., male, holotype, genitalia; 129, lateral; 130, ventral; 131, dorsal. 132–133, Chimarra goroca Sykora, male, genitalia; 132, lateral; 133, ventral. 134–136, Chimarra huonana sp. nov., male, holotype, genitalia; 134, lateral; 135, ventral; 136, dorsal.