Austrelatus manokwariensis, 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

14. Austrelatus manokwariensis sp. nov.

Figs 46 , 50 , 83

Type locality.

Indonesia: West Papua Province: Manokwari Regency, near road Kebar to Aibogar, 0°51'44.6"S, 132°49'47.6" Е, 503 m a.s.l.

Type material.

Holotype: male "Indonesia: Papua Barat, Kebar to Aibogar, slow forest stream, 503 m, -0,8624 132,8299, UNIPA team (BH025)" (MZB).

Paratypes: IN: West Papua: Manokwari Regency: 32 males, 38 females with the same label as the holotype (MZB, NHMW, ZSM). 4 females "Indonesia: Papua Barat, lowland Manokwari, 66 m, 8.v.2015, -0,7433 133,3975, UNIPA team (BH065)" (ZSM). 2 males "Indonesia: Papua Barat, Manokwari, Maripi, swampy stream margin forest, 135 m 28.viii.2014, -0,9075 133,9214, Balke & Panjaitan (BH038)", “6446” and “6447” [green text] (ZSM). 2 males, 1 female "Indonesia: Papua, Manokwari, 140 m, 8.ii.2006, 00.55.752S 133.54.448E, Tindige (BH 09)", one male additionally with a green label “4249” (ZSM). 4 females "IN: West Papua: Manokwari Reg., on road Manokwari-Kebar, near Munbrani vill., ca. 600 m, 8.V., 09.15.458S 133.02.389E, roadside ditch (2015-WP36)" (NHMW). 6 males, 1 female "Indonesia: Papua Barat, Manokwari to Kebar, forest stream, 302 m, -0.8005 133.3321, UNIPA team (BH023)" (NHMW, ZSM). 9 males, 8 females "Indonesia: Papua Barat, Kebar to Manokwari, 1h from Kebar, limestone creek and roadside pools,", "331 m, 8.xi.2013, -0.8013 133.3223, UNIPA team (BH035)", one male additionally with a green text label “6244” (NHMW, ZSM). 11 males, 11 females "Indonesia: Papua Barat, Kebar Valley, 596 m, 6.v.2015, -0,8406 133,2682, UNIPA team (BH059)" (NHMW, ZSM). 19 males, 12 females "Indonesia: Papua Barat, Fumato, forest stream, 820 m, -0.9042 132.7198, UNIPA team (BH027)", two males additionally with green text labels “6215” and “6216” (NHMW, ZSM).

Teluk Wondama Regency: 6 males, 5 females "Irian Jaya: Wandammen Bay, Wasior, Sararti 100-200 m, 7.-9.I.2001, leg. A. Riedel" (NMPC, SMNS).

Description.

Body size and form: Beetle small or medium-sized, with oblong-oval habitus (Fig. 46 ).

Measurements: TL 4.6-5.7 mm, TL-H 4.2-5.2 mm, MW 2.35-2.8 mm, TL/MW 1.96-2.04; PL 0.65-0.85 mm, PW 2-2.4 mm, PL/PW 0.33-35; DBE 0.85-1 mm, DBE/PW 0.42-0.43.

Holotype: TL 5.1 mm, TL-H 4.6 mm, MW 2.5 mm, TL/MW 2.04; PL 0.7 mm, PW 2.15 mm, PL/PW 0.33; DBE 0.9 mm, DBE/PW 0.42.

Colouration: Dorsally piceous, with reddish yellow head, pronotal sides, and distinct two or three basal and one apical spot on elytron (Fig. 46 ).

Head yellowish red to reddish brown, darker narrowly behind eyes. Pronotum reddish brown to piceous on disc and paler towards sides, yellow to reddish brown on them. Sometimes only anterior and posterior margins medially dark. Elytron dark brown to piceous, with two distinct yellow to reddish brown spots on elytral base: one, usually slightly larger, between striae 2 and 4 and second, smaller, between striae 4 and 6; usually these spots confluent forming basal band with notched posterior margin; sometimes third small or rather large, vague spot can be present at stria 1; elytron with distinct elongate apical spot. Scutellum reddish brown to piceous. Antennae, other head appendages, and legs proximally yellow; legs darker distally, yellowish red, especially metalegs. Venter yellow to yellowish red, with paler prosternum. Teneral beetles paler.

Surface sculpture: Elytron with six complete dorsal striae; submarginal stria present: 6+1 (Fig. 46 ).

Head without strioles, with rather dense punctation (spaces between punctures 1-3 × size of punctures); punctures relatively fine (diameter of punctures usually equal to diameter of microreticulation cells); head with a row of coarse setigerous punctures along inner margin of each eye and a short row at frontal angle of each eye; a slightly longer puncture row forms fronto-clypeal depression at each head side; microreticulation distinct. Pronotum usually with several strioles in posterolateral angles or without them; with fine longitudinal wrinkles at posterior margin; pronotal punctation finer than on head; setigerous punctures form a row along pronotal margins, absent in posterior middle; disc of pronotum with indistinct longitudinal median scratch. Pronotum with fine microreticulation. Elytron with 6 dorsal striae; striae 1-4 and 6 complete, stria 5 usually shortly reduced basally, stria 1 very seldom shortly reduced basally; submarginal striae present. Elytron with fine punctation and microreticulation. Ventral part with fine, inconspicuous punctation, invisible on metaventrite and metacoxae and weak on abdominal ventrites; prosternum smooth medially; metaventrite and metacoxae with weak microreticulation; on abdominal ventrites microreticulation almost invisible; metacoxal plates with numerous, distinctly impressed longitudinal strioles, abdominal ventrites 1 and 2 with numerous, long, longitudinal strioles from margin to margin, on abdominal ventrites 3 and 4 strioles situated laterally and turn to middle, almost horizontal, abdominal ventrites 5 and 6 without strioles but with fine punctation that sparser medially and forms a dense, rugose lateral area at each side.

Structures: Head broad. Pronotum short and broad; lateral margins distinctly convergent anteriorly. Base of prosternum broadly rounded anteriorly, convex medially; blade of prosternal process rather long, narrow, convex in middle.

Male: Protibia straight, not modified. Proclaws simple, rather long, subequal in length. Median lobe of aedeagus with two lobes of dorsal sclerite rather narrow; left dorsal lobe shorter that right one, with weak, long lateral crest and apex evenly curved downwards, not really to left, dorsally with distinct denticulation (spinulae) weakly visible in lateral left view due to weak curvation to left; right dorsal lobe with small, indistinct, elongate median impression and modified apex: relatively large, swollen, rounded; left lobe of ventral sclerite with its sclerotised area large, rounded apically, shorter than right ventral and dorsal lobes and slightly more than 1/2 length of left dorsal lobe. Paramere with setae not divided into distal and proximal; more distally situated setae slightly denser than more proximal ones, sometimes with few the most proximal setae standing separately in left paramere (Fig. 50 ).

Female: As male.

Variability.

There is an insignificant variation in the colouration, dorsal striolation, and shape of the median lobe.

Affinities.

In general shape of median lobe, especially in shape of the sclerotised area of left ventral lobe and in shape of the lateral crest of the left dorsal lobe, the species is similar to A. fakfak sp. nov., A. testegensis sp. nov., and A. wanggarensis sp. nov. The latter can be distinguished from A. manokwariensis sp. nov. by 11+1 elytral striae and shape and size of the median lobe sclerites. From A. fakfak sp. nov. and A. testegensis sp. nov., A. manokwariensis sp. nov. differs in distinct maculation of elytron and shape of the median lobe sclerites, especially in apex of the left dorsal lobe more curved downwards than to left.

Etymology.

The species is named after Manokwari Regency. The name is an adjective in the nominative singular.

Distribution.

New Guinean endemic. Indonesia: West Papua Province: Manokwari and Teluk Wondama regencies (Fig. 83 ).

Habitat.

The species was collected in stream-side puddles and water-filled holes in large boulders, filled with leaves.

Figures

Figure 50. Austrelatus manokwariensis sp. nov., 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 83. Map of New Guinea showing distribution of seven Austrelatus species.

Figures 44 - 47. Habitus and colouration of 44 Austrelatus fojaensis sp. nov. 45 A. fakfak sp. nov. 46 A. manokwariensis sp. nov. 47 A. toricelli sp. nov.