Limbodessus habbema, 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.15602645
persistent identifier	https://treatment.plazi.org/id/FC9DB0CE-A58E-5454-8424-7D29B4FF48A0
treatment provided by	Alpine Entomology by Pensoft
scientific name	Limbodessus habbema
status	sp. nov.

Treatment

Limbodessus habbema sp. nov.

Figs 3 A, B, C View Figure 3 , 8 D View Figure 8 , 10 C View Figure 10 , 11 F View Figure 11 , 12 D, E View Figure 12 , 13 F View Figure 13 , 14 View Figure 14 , 16 C View Figure 16

Type locality.

Mossy puddles in Alpine grassland, Lake Habbema area, Angguruk-Baliem, 3,200 m [04 ° 07 ' 77 S, 138 ° 40 ' 77 E], Papua, Indonesia.

Type material.

Holotype, male: “ Indonesia, Papua, Lake Habbema , pools, 3200 m, 19. x. 2011, 04.07. 772 S 138.40. 773 E, Balke leg. ( PAP 06 ) ”, “ Holotype Limbodessus habbema sp. nov. Balke et al. 2025 ” [red printed label] ( MZB) .

Paratypes (322): 126 exs., with the same label data as the holotype ( NHMW, KSP, ZSM) ; 70 exs., “ IRIAN JAYA: Lake Habbema , 17. 10. 1993, 3250 m, ca. 138°40E 04°09'S, leg. M. Balke (37) ” [IR 93 # 37] ( NHMW, ZSM) GoogleMaps ; 1 ex., “ 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) GoogleMaps ; 81 exs., “ Papua, Lake Habbema , 3300 m, 24.04, 2006, Tindige leg. ”, 3 specimens with printed green labels “ 3161 ”, “ 3162 ”, “ 3163 ” ( ZSM) ; 11 exs., “ Irian Jaya, Wamena E, Habbema lake , 4°07'S 138°40'E, 20. 1. 1999, leg. A. Weigel ” ( ZSM) GoogleMaps ; 2 exs., “ Indonesia, West Papua, Highland near Lake Habbema , Sphagnum-pools near the road, 3451 m, 4°06'32.8"S 138°38'54.2"E, 09. 06. 2022, N. Wendlandt leg. ” ( CNW, ZSM) GoogleMaps ; 19 exs., “ Indonesia, West Papua, Lanny Jaya, Kecamatan Makki highland , peatland pools, 3013 m, 4°01'13.7"S 138°35'34.0"E, 06. 06. 2022, N. Wendlandt leg. ” ( CNW, ZSM) GoogleMaps ; 18 exs., “ Indonesia, West Papua, Lanny Jaya, Kecamatan Makki highland , peatland pools, 3170 m, 4°02'25.0"S 138°36'20.5"E, 07. 06. 2022, N. Wendlandt leg. ” ( CNW, ZSM) GoogleMaps ; 11 exs., “ Indonesia: Papua, Lake Habbema , Phyllodrom leg. 2001 ” ( ZSM) ; 48 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., “ Indonesia: Papua, Lake Habbema , 3400 m, viii. 2018, - 4.1460 ° 138.675 °, Sumoked (Pap 77) ” ( MZB, ZSM) . All paratypes are provided with a red printed paratype label.

Measurements.

Holotype: TL = 2.7 mm; TL-H = 2.5 mm; MW = 1.2 mm. Paratypes: TL 2.25–2.8 mm, TL-H = 2.15–2.65 mm, MW = 1.1–1.2 mm.

Description.

Large, body elongate-oval, with distinct discontinuity in lateral outline between pronotum and elytron. Sutural line absent; cervical line absent, but some specimens with a cervical dense row of punctures. Pronotal and elytral stria present and distinct (Fig. 3 A, B, C View Figure 3 ).

Color. Head black, clypeus anteriorly paler, dark brown. Pronotum with anterior half, laterally, and basal angles dark ferruginous to dark yellowish, baso-medially darker, dark brown to blackish; in one specimen almost entirely yellowish. Elytron dark brown to dark ferruginous; in some specimens posteriorly with distinct dark yellowish and dark brown color pattern. Antennomeres 1–4 / 5 dark ferruginous, 6–11 darker, blackish. Legs dark ferruginous; mid of metatibiae and metatarsi darker, blackish (Fig. 3 A View Figure 3 ). Ventral side chiefly black. Prosternum, epipleura and sternite 7 ferruginous.

Sculpture. Head densely punctate; a cervical dense row of punctures visible, vertex almost impunctate but with distinct microreticulation only. Size of punctures on frons equal of size of meshes of microreticulation but decreases towards clypeus. Pronotum with moderately dense punctation along fore-margin; size of punctures as on frons; otherwise with fine and sparse punctation only. Elytron with moderately dense and evenly distributed punctation that may be faint on antero-sutural part. 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. Shiny. Distinct microreticulation only posteriorly of cervical row of punctures on head; indistinct microreticulation of that line anteriorly. Antennomeres rather long and narrow; antenna thus not appearing stout (Figs 12 D, E View Figure 12 , 13 F View Figure 13 ). Median lobe as in Fig. 8 D View Figure 8 and parameres as in Figs 10 C View Figure 10 , 11 F View Figure 11 .

Female. Dull. Head with faint microreticulation, pronotum and elytron dull with distinct microreticulation between punctures. Antenna distinctly clubbed due to lateral expansion of antennomeres 3–11 (Figs 12 D, E View Figure 12 , 13 F View Figure 13 ). Some females with broadly enlarged antennomeres (Fig. 3 C View Figure 3 ).

Etymology.

Named after the Habbema lake, where the species was discovered. The name is a noun in the nominative standing in apposition.

Distribution.

Only known from the Lake Habbema area in the central mountain range of Papua (Fig. 14 View Figure 14 ).

Differential diagnosis.

The new species belongs to a group of larger (TL = 2.25–3.0 mm) and almost blackish high alpine species. Limbodessus habbema sp. nov. is close to L. alexanderi and L. juliana sp. nov. but can be separated from them by the form of the female antennae, which is distinctly clubbed due to lateral expansion of antennomeres 3–11 (Figs 12 D, E View Figure 12 , 13 F View Figure 13 ), the form of the median lobe (Fig. 8 D View Figure 8 ), and the form of the parameres (Figs 10 C View Figure 10 , 11 F View Figure 11 ).