Chimarra ukarumpana, 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 : 6-9

Chimarra ukarumpana sp. nov.

Figures 7–10

Holotype. Male (specimen in alcohol, CT-344 figured), PNG (East Highlands District / Province ), Ram Creek , Ukarumpa , about 6° 07' S, 145° 24' E, 23 June 1986, A. Wells ( NMV, T-).

Diagnosis. The male of C. ukarumpana aligns with the C. papuana group (after Mey, 2006) and is most similar to C. papuana Kimmins and C. tulok Oláh in that in lateral view, the inferior appendages are sub-rectangular with the distal margin truncate. C. ukarumpana and C. tulok can be separated from C. papuana by small differences in the genitalia, including inferior appendages in lateral view are slightly more tapered basally and not as regularly rectangular as for C. papuana and have a more elongate dorso-apical projection. In C. ukarumpana , the apices of the lateral lobes of segment X are pointed distally and in C. tulok dorso-basally.

Description. General body colour and wings pale (faded). Wings (fig. 7) similar to those of C. papuana ( Kimmins, 1962: fig. 10). 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 absent, forks 2, 3 and 5 present.

Male. Segment IX anterior margin in lateral view, greatly produced ventro-basally into a rounded extension (fig. 8); ventral process slender, elongate, rod-like, extending past distal margin of segment IX (figs 8, 9), in lateral view length about 10 times width (fig. 8); preanal appendages small, rounded apically (figs 8, 10), narrowed basally (fig. 8). Segment X with pair of slender lateral lobes, mostly adpressed to phallus, slightly downturned and curved outwards apically (figs 8, 10), with two small hairs subapically (fig. 9). Phallus with two slender spines included subapically (figs 8–10). Inferior appendages robust, sub-rectangular (figs 8, 9), in lateral view angled at about 30° to horizontal, length about 2.5 times width, slightly broader in apical half, truncate apically (fig. 8), with long and slender dorso-subapical projection, apex slightly dilated, bearing two short spines (figs 8–10), in ventral view with two small projections on mesal margin (fig. 9).

Female. Unknown.

Etymology. Ukarumpana – named after the type locality (Ukarumpa).

Remarks. Chimarra ukarumpana is known only from the holotype male from the type locality in central PNG.

Figures

Figures 1–7. Chimarra spp.; 1–3, Chimarra pertica sp. nov., male, holotype, genitalia; 1, lateral; 2, ventral; 3, dorsal. 4–6, Chimarra guentheri Mey, male, genitalia; 4, lateral; 5, ventral; 6, dorsal. 7, Chimarra ukarumpana sp. nov., male, holotype; 7, wings.

Figures 8–16. Chimarra spp.; 8–10, Chimarra ukarumpana sp. nov., male, holotype, genitalia; 8, lateral; 9, ventral; 10, dorsal. 11–13, Chimarra mendiana sp. nov., male, holotype, genitalia; 11, lateral; 12, ventral; 13, dorsal. 14–16, Chimarra bintang sp. nov., male, holotype, genitalia; 14, lateral; 15, ventral; 16, dorsal.