Austrelatus adelbert (Megna, Atthakor, Manaono, Hendrich & Balke, 2017) Shaverdo & Hájek & Hendrich & Surbakti & Panjaitan & Balke, 2023

Shaverdo, Helena, Hajek, Jiri, Hendrich, Lars, Surbakti, Suriani, Panjaitan, Rawati & Balke, Michael, 2023, Austrelatus gen. nov., a new genus of Australasian diving beetles (Coleoptera, Dytiscidae, Copelatinae), with the discovery of 31 new species from New Guinea, ZooKeys 1170, pp. 1-164 : 1

1. Austrelatus adelbert (Megna, Atthakor, Manaono, Hendrich & Balke, 2017) comb. nov.

Figs 14 , 18 , 82

Copelatus adelbert Megna, Atthakor, Manaono, Hendrich & Balke, 2017: 50.

Type locality.

Papua New Guinea: Madang Province, Adelbert Range, Keki birdwatching area, 04°42'21.5"S, 145°25'15.4"E.

Type material.

Holotype: male "Papua New Guinea: Madang, Adelbert Mts., Sewan - Keki, 700 m, 04°42'215"S, 145°25'154"E, 4.v.2006, leg Balke & Manaono (PNG 51)", "HOLOTYPE Copelatus adelbert sp. n. Det.: Y. S. Megna, W. Atthakor, M. Manaono, L. Hendrich & M. Balke 2017" [red], “HOLOTYPUS” (ZSM).

Paratypes: 1 male, 1 female with the same label as the holotype and with "PARATYPE Copelatus adelbert sp. n. Det.: Y. S. Megna, W. Atthakor, M. Manaono, L. Hendrich & M. Balke 2017" [red] (ZSM). 2 males "Papua New Guinea: Madang, Adalbert [sic!] Mts., Keki, 850 m, 4.v.2006, nr 04.42.300S 145.25.089E, Balke & Manaono (PNG 52)" (ZMS). 3 males, 3 females "Papua New Guinea: Madang, Adalbert [sic!] Mts., below Keki, 790 m, 5.v.2006, 04.42.300S 145.25.089E, Balke & Manaono (PNG 53)" (ZMS). 1 male, 2 females "Papua New Guinea: Madang, Adalbert [sic!] Mts., creek nr Keki, 790 m, 26.xi.2006, 04.42.300S 145.25.089E, Binatang Boys leg. (PNG 53a)" (ZMS).

Additional material.

1 male “3204” [green label], " Papua New Guinea: Madang, Adalbert [sic!] Mts., Keki , 850 m, 4.v.2006, nr 04.42.300S 145.25.089E, Balke & Manaono (PNG 52)" (ZMS). 1 male " Papua New Guinea: Madang, Adalbert [sic!] Mts., 400 m, 29.xi.2006, 04.43.058S 145.24.437E, Binatang Boys (PNG 119)" (ZMS). 3 males, 1 female " Papua New Guinea: Madang, Keki, Adalbert [sic!] Mts., 500 m, 29.xi.2006, 04.43.058S 145.24.437E, Balke & Kinibel (PNG 118)" (NHMW, ZMS) .

Diagnosis.

For complete description, see Megna et al. (2017: 51-53).

Beetle medium-sized: TL 5.9-6.4 mm, TL-H 5.5-5.9 mm, with oblong-oval habitus of continuous outline. Dorsal colouration very distinct: yellow to orange head, black pronotum with yellow to orange lateral bands, elytron with broad basal and apical yellow to orange parts. Elytron without striae and strioles in both sexes. Proclaws relatively long, slender, equal in in length. Median lobe of aedeagus relatively broad; its dorsal and ventral sclerites almost equal in length, relatively thin apically, pointed; ventral sclerite weakly sclerotised: its right lobe membranous, long, and usually sticking out ventrally, with small lateral sclerotised area; left ventral lobe shorter, almost completely but weakly sclerotised, without a lateral sclerotised area. Paramere of narrow triangular form, more or less evenly tapering to apex, with setae not divided into distal and proximal, slightly sparser and shorter proximally (Figs 14 , 18 ).

Affinities.

Due to its dorsal colouration and smooth elytra, the species cannot be mixed up with any other NG species. In addition, it differs from all other representatives of the A. neoguineensis group in less modified sclerites of the median lobe and less sclerotised ventral sclerite (left ventral lobe without lateral sclerotised area).

Distribution.

New Guinean endemic. Papua New Guinea: Madang Province, Adelbert Range (Fig. 82 ).

Habitat.

The species is collected from small puddles along forest creeks; the ground was red clay with sand, gravel and sometimes leaves ( Megna et al. 2017).

Figures

Figure 18. Austrelatus adelbert (Megna et al., 2017), median lobe A left lateral view B right lateral view C ventral view D left paramere in external view E right paramere in internal view. Scale bar: one unit - 0.1 mm (A-C).

Figure 82. Map of New Guinea showing distribution of 11 Austrelatus species.

Figures 14 - 17. Habitus and colouration of 14 Austrelatus adelbert (Megna et al., 2017) 15 A. lembenensis sp. nov. 16 A. nadjae sp. nov. 17 A. pseudoneoguineensis sp. nov.