Limbodessus konoensis, Balke & Villastrigo & Hájek & Surbakti & Panjaitan & Hendrich, 2025

Balke, Michael, Villastrigo, Adrián, Hájek, Jiří, Surbakti, Suriani, Panjaitan, Rawati & Hendrich, Lars, 2025, A review of Limbodessus Guignot, 1939 from New Guinea, with description of eight new tropical-alpine species (Coleoptera, Dytiscidae, Bidessini), Alpine Entomology 9, pp. 5-28 : 5-28

publication ID	https://doi.org/10.3897/alpento.9.147831
publication LSID	lsid:zoobank.org:pub:15F39A4A-E56E-41F1-860B-90B05ABF06E8
DOI	https://doi.org/10.5281/zenodo.15602654
persistent identifier	https://treatment.plazi.org/id/622FD587-2429-5888-8A5E-80D7FA4DE484
treatment provided by	Alpine Entomology by Pensoft
scientific name	Limbodessus konoensis
status	sp. nov.

Treatment

Limbodessus konoensis sp. nov.

Figs 2 C View Figure 2 , 8 A View Figure 8 , 10 F View Figure 10 , 11 D View Figure 11 , 13 J View Figure 13 , 14 View Figure 14 , 16 C View Figure 16 , 17 B, C, D View Figure 17 , 18 D, E View Figure 18

Type locality.

Mossy puddles in Alpine grassland, near Lake Habbema, 3,400 m [138 ° 67 ' E, 04°14'S], Papua, Indonesia.

Type material.

Holotype, male: “ Indonesia: Papua, Lake Habbema , 3400 m, viii. 2018, - 4.1460 ° 138.675 °, Sumoked (Pap 77) ”, “ Holotype Limbodessus konoensis sp. nov. Balke et al. 2025 ” [red printed label] ( MZB) .

Paratypes (722): 69 exs., with the same label data as the holotype ( NWM, ZSM) ; 72 exs., “ Indonesia, Irian Jaya, 10 ix. 1992, Kono-Angguruk 2800 m, 139°47'E 04°19'S, leg. Balke (45) GoogleMaps ; 71 exs., “ IRIAN JAYA: 15. 9. 1992, Gunung Elit , 3450 m, 139°17'E 04°14'S, leg. Balke (50) ” [IR 92 # 50] ( NWM, ZSM) GoogleMaps ; 220 exs., “ IRIAN JAYA: Angguruk-Baliem, 10. - 11. 10. 1993, Mt. Elit , ca. 139°17'E 04°14'S, 3400 m, leg. M. Balke (33) ” [IR 93 # 33] GoogleMaps ; 35 exs., “ Irian Jaya: 18. 10. 1993 Trikora Area Fuß des Mt. Trikora , ca. 138°43'E 04°13'S, 3200 m, leg. M. Balke (38) ” [IR 93 # 38] ( NHMW, ZSM) GoogleMaps ; 231 exs., “ IRIAN JAYA: Trikora Gebiet, 19. - 20. 10. 1993, Habbema [Lake] and Kali Oue Tal [Valley] , ca. 138°43'E 04°13'S, 3450 m, leg. M. Balke (39) ” ( NHMW, ZSM) GoogleMaps ; 9 exs., “ IRIAN JAYA: 21. 10. 1993, Habbema-Gebiet Pass zum Ibele Tal [pass to Ibele Valley], ca. 138°45'E 04°07'S, 3300 m, leg. M. Balke (40) ” [IR 93 # 40] ( NHMW, KSP, ZSM) GoogleMaps ; 6 exs., “ INDONESIA, Papua: Jayawijaya Distr., ca. 30 km W of Wamena, open wetland nr Habbema lake , 04°07.8'S, 138°40.7'E; 3330 m, J. Hájek & J. Šumpich leg., 5. ii. 2015 ” ( NMPC) GoogleMaps ; 9 exs., “ Irian Jaya, Wamena, Jayawijaya Prov., W. Gunung Elit , 3300 m, 15. IX. 1991, A. Riedel leg. ” ( CLH, ZSM) . All paratypes are provided with a red printed paratype label.

Measurements.

Holotype: TL = 2.3 mm; TL-H = 2.1 mm; MW = 1.1 mm. Paratypes: TL 2.35–2.5 mm, TL-H = 2.1–2.2 mm; MW = 1.0– 1.1 mm.

Description.

Medium sized, body elongate-oval; apically slightly drop-shaped; with distinct discontinuity in lateral outline between pronotum and elytron. Cervical or sutural line absent. Pronotal and elytral stria present and distinct (Fig. 2 C View Figure 2 ).

Color. Body chiefly black. Clypeus anteriorly, pronotum medially and laterally slightly paler: dark ferruginous. Antenna chiefly blackish. Legs dark ferruginous (Fig. 2 C View Figure 2 ). Ventral side chiefly black. Prosternum, epipleura and sternite 7 ferruginous.

Note: The first author frequently collected / observed paler specimens that appear mature: head dark castaneous; pronotum anteriorly dark castaneous, rest dark yellow; elytron anterior half dark yellow, posterior half dark castaneous.

Sculpture. Head moderately densely punctate, densest on frons; punctation on clypeus and vertex sparse; with indistinct microreticulation of small polygonal meshes. Punctures slightly larger than meshes. Pronotum with moderately dense punctation along fore-margin; rest sparsely punctate especially on disc; an indistinct microreticulation visible discally. Size of punctures as on head, discally distinctly smaller. Elytron with moderately dense and evenly distributed punctation; between punctures with hardly visible larger polygonal meshes. Ventral side with few punctures, shiny; only sternite 7 with distinct microreticulation.

Structures. Metacoxal lines anteriorly diverge and do not reach posterior margin of metaventrite.

Male. Elytron rather shiny, sometimes with antero-sutural microreticulation. Antenna stout (Fig. 13 J View Figure 13 ). Median lobe as in Fig. 8 A View Figure 8 and parameres as in Figs 10 F View Figure 10 , 11 D View Figure 11 .

Female. Generally identical to male in habitus; elytron sometimes dull, with distinct microreticulation between punctures. The corresponding author has seen 4 specimens with strong pronotal and elytral microreticulation from Mount Elit (IR 92 # 50). Antenna stout but without conspicuous modifications.

Etymology.

Named after Kono village, situated at the easternmost limit of the species’ range. The name is an adjective in the nominative singular.

Distribution.

From the valley below Mt. Orom, Mount Elit, Lake Habbema and Kali Oue Valley around Mt. Trikora (= Mt. Wilhelmina) (Fig. 14 View Figure 14 ).

Differential diagnosis.

L. konoensis sp. nov. is a medium sized (TL = 2.3–2.5 mm) and almost blackish high alpine species. The new species is close to L. alexanderi , L. juliana sp. nov., L. moni and L. habbema sp. nov. but can be separated from them by its smaller size, and the form of the female antennae (female with regularly enlarged antennomeres in L. moni ), which is stout but without any conspicuous modifications (Fig. 2 C View Figure 2 ), the form of the median lobe (Fig. 8 A View Figure 8 ), and the form of the parameres (Figs 10 F View Figure 10 , 11 D View Figure 11 ).