Limbodessus aipo Balke, Villastrigo, Hájek, Surbakti, Panjaitan & Hendrich, 2025, sp. nov.

Limbodessus aipo sp. nov. Figs 1 A, 7 A, 11 A, 13 A, 14, 17 F, G Type locality. Small peatland pool, along track from Aipomek to Langda, 3,550 –3,600 m [140°05'E, 04°27'S], Papua, Indonesia. Type material. Holotype, male. “ IRIAN JAYA: Aipomek Area [N Pass] Aipomek-Langda, 140°05'E 04°27'S, 22. - 24. 8. 1992, 3550–3600 m, leg. M. Balke (20–22) ” [IR 92 # 20-22], “ Holotype Limbodessus aipo sp. nov. Balke et al. 2025 ” [red printed label] (NHMW). Paratypes (96): 46 exs., same label data as holotype (NHMW, KSP, ZSM); 37 exs., “ Irian Jaya: Aipomek area, 140°06'E 04°27'S, 27. 8. 1992, 3500 m [S pass] Aipomek-Langda, leg. Balke (23) ”; 13 exs., “ Irian Jaya, ca. 139°47'E 04°19'S [Valley below Mt. Orom, trek Kono-Angguruk, 2800 m], 5–6.10. 1993, leg. Balke (29 / 30) ” [IR 93 # 29-30] (NHMW, KSP, ZSM). All paratypes are provided with a red printed paratype label. Measurements. Holotype: TL = 1.55 mm; TL-H = 1.50 mm; MW = 0.70 mm. Paratypes: TL = 1.60–1.70 mm; TL-H = 1.50–1.60 mm; MW = 0.65–0.70 mm. Description. Smaller species, body elongate, appearing somewhat parallel-sided, with slight discontinuity in lateral outline between pronotum and elytron. Cervical or sutural line absent. Pronotal and elytral stria present and distinct, long (Fig. 1 A). Color. Body dark brown to blackish. Clypeus and pronotum anteriorly, medially and laterally slightly paler: dark ferruginous to castaneous brown. Antennomeres 1–5 / 6 dark ferruginous, 6–11 darker, blackish; in a few specimens paler however, completely ferruginous. Legs dark ferruginous (Fig. 1 A). Ventral side chiefly black. Prosternum, epipleura and sternite 7 ferruginous. Sculpture. Head moderately densely punctate; punctation on clypeus and vertex sparse; with distinct microreticulation of small polygonal meshes. Size of punctures equals diameter of meshes. Pronotum with moderately dense punctation along fore-margin; other parts with sparse punctation. Size of punctures as on head. Elytron with moderately dense and evenly distributed punctation; between punctures with almost invisible larger polygonal meshes. Ventral side with few punctures, shiny; only sternite 7 with distinct microreticulation. Epipleura narrow posteriorly, disappeared at level of sternite 6, sternite 7 with border. Structures. Metacoxal lines anteriorly diverging and not reaching posterior margin of metaventrite. Male. Pronotum with microreticulation of small polygonal meshes being confined to a medial portion, expanded laterally as far as level of striae. Elytron shiny, no microreticulation visible between punctures but a network of large polygonal meshes. Antenna moniliform due to globular form of antennomeres (Fig. 13 A). Median lobe as in Fig. 7 A, parameres as in Fig. 11 A. Female. Pronotum shagreened, dull. Elytron dull, distinctly shagreened between the punctures. Antenna moniliform due to globular form of antennomeres. Etymology. Dedicated to the people inhabiting parts of the type area, i. e. the Aipo people. The name is a noun in the nominative standing in apposition. Distribution. Aipomek-Langda and valley below Mt. Orom, trek Kono-Angguruk, in the Central Highlands of Papua (Fig. 14). Differential diagnosis. Limbodessus aipo sp. nov. belongs to a group of smaller (TL = 1.55–1.90 mm) and almost blackish high alpine species. The new species is close to L. aldente sp. nov., L. elit sp. nov. and L. wilhelmina sp. nov. but can be separated from them by the form of the female antennae, which is moniliform due to globular form of antennomeres (Fig. 13 A), the form of the median lobe (Fig. 7 A, B, C), and the form of the parameres (Fig. 11 A). Habitat. Small puddles in alpine meadows (Fig. 17 F, G).