Rugabinthus mamberamo sp. nov.

(Figs 3, 4B, 5B, 6B, 7B, 8B, 9B, 10B, 11C, 11D, 12)

Material examined. -

Holotype: INDONESIA • ♂; West Papua, Fawi [Faowi] village in upper part of Tariku River (tributary of Mamberamo River), partly low-lying forest and partly forest on hills; 29 January-17 February 2012; A. Gorochov leg.; molecular sample L94; ZIN . Paratype: INDONESIA • 1♀; same information as holotype; MNHN-EO-ENSIF1758 .

Type locality. -

INDONESIA: West Papua: Faowi

Etymology. -

This species is named after Mamberamo River; noun in apposition. The name is derived from the main river rather than the tributary Tariku River because it has more elongated and larger male genitalia compared to the sympatric species R. tariku sp. nov.

Diagnosis. -

This new species differs from all congeners by male genitalia, with pseudepiphallus very slender and very elongate, close to that of R. leopoldi from which it differs by posterior apex forming a long flat spoon slightly curved dorsally near apex, looking like a simpler version of R. leopoldi, with thinner pre-apical expansions, apex somewhat truncated, without lophi; pseudepiphallic parameres stout, weakly curved, apex strongly sclerotized and rounded. From the sympatric species R. tariku sp. nov., the new species differs by larger size and by male and female genitalia.

Description. -

Average sized among congeners (Fig. 12). Dorsum of head with broad red brown bands narrowly separated (Fig. 4B). Fastigium red brown (Fig. 4B). Scapes dark brown. Fastigium verticis and frons dark brown, frons without spots; clypeus and mouthparts dark brown, labrum yellow brown (Fig. 5B). Pronotal disk dark red brown, lateral parts yellow brown mottled with red brown patterns (Fig. 4B). Lateral lobes of pronotum dark brown, distinctly darker than disk (Fig. 6B). FIs and FIIs yellow brown with dense dark spots and patterns; TIs and TIIs dark brown with a cream-colored spot or incomplete ring in middle. FIIIs brown, knees dark brown to black. Tergites brown, with posterior margin darker.

Male. FWs reaching middle of third abdominal tergite. FW coloration (Fig. 7B): Dorsal field cells and veins mostly brown; with area between M and R infumate cream-colored; basal area with a medium cream-colored spot on external corner. Lateral field brown in dorsal half, gray brown in ventral half. FW venation typical of genus; 1A angle broken by a flat segment; oblique vein posterior branch almost straight. Apical field very small, with only one straight cell alignment posterior to D alignment. Apex of dorsal field rounded.

Male genitalia: (Figs 8B, 11C, 11D) Pseudepiphallus very slender and elongate, very sclerotized; slightly concave in lateral view, raised dorsally at base and apex; its basal margin almost straight, with a dorsal sclerotized plate; widened laterally, forming wide shoulders carrying bases of rami; lateral margins substraight; posterior part of pseudepiphallus elongate, forming a flat narrow spoon slightly concave, with two thin dorsal pre-apical expansions (Fig. 11C); posterior apex somewhat truncated, without lophi. Rami very short, way shorter than half the pseudepiphallus length. Pseudepiphallic parameres stout, weakly curved, their apex strongly sclerotized and rounded. Endophallic sclerite narrow, Y-shaped, with anterior region short and not reaching anterior margin of pseudepiphallic sclerite, with lateral arms elongated and slender, without median posterior expansion.

Female. FWs slightly surpassing second tergite. Dorsal field with a cream-colored oval spot at base without clearly defined margin (Fig. 9B).

Female genitalia: Ovipositor distinctly shorter than FIII. Copulatory papilla globular, its basal part with an irregular sclerotization forming a basal rim, with a large, rounded apex, mostly membranous and curved ventrally (Fig. 10B).

Measurements. -

See Table 1.