Exocelina manokwariensis batanta, Shaverdo, Helena, Panjaitan, Rawati & Balke, Michael, 2016

Shaverdo, Helena, Panjaitan, Rawati & Balke, Michael, 2016, A new, widely distributed species of the Exocelinaekari-group from West Papua (Coleoptera, Dytiscidae, Copelatinae), ZooKeys 554, pp. 69-85 : 74-77

Taxon classification Animalia Coleoptera Dytiscidae

Exocelina manokwariensis batanta ssp. n. Figs 3, 4

Exocelina undescribed sp. MB1277: Toussaint et al. 2014: Supplementary figs 1-4, tab. 2.

Type locality.

Indonesia: West Papua Province: Raja Ampat Regency, Batana Utara, approximately 00°50.13'S; 130°42.86'E.

Type material.

Holotype: male "Indonesia: Papua, Batanta Utara, 180m, above 00.50.125S 130.42.856E (BH 13)" (MZB). Paratype: 16 males, 14 females with the same label as the holotype, two males additionally with green labels "M.Balke 1277", "M.Balke 1278" (MZB, NHMW, ZSM). 3 males, 4 females "Indonesia: Papua, Batanta Selatan, Wailebet, 280m, inland 00.53.957S 130.39.951E, (BH 16)", one male additionally with a green label "M.Balke 1280" (NHMW, ZSM). 2 males, 2 females "Indonesia: Papua, Salawatti Utara, 100-250m, inland 00.57.954S 130.40.531E (BH 18)", one male additionally with a green label "M.Balke 1281" (NHMW, ZSM).

Description.

As nominative subspecies, except for the following characters.

Size: TL-H 3.2-3.6 mm, TL 3.65-3.95 mm, MW 1.75-1.9 mm; holotype: TL-H 3.5 mm, TL 3.85 mm, MW 1.85 mm.

Coloration: Head reddish brown to dark brown, paler on clypeus and vertex; pronotum reddish brown to dark brown, with paler sides and darker disc; elytra brown to blackish brown, usually with reddish brown sutural lines (Fig. 3).

Surface sculpture: Dorsal microreticulation, especially on head and pronotum, slightly weaker.

Structures: Base of prosternum and neck of prosternal process with distinct ridge, rounded and smooth anteriorly, with few transverse lines.

Male: Antennomeres 3-4 strongly enlarged and triangular (3 distinctly larger than 4), 5-6 distinctly enlarged, 7-8 somewhat enlarged (Fig. A). Protarsomere 5 ventrally with anterior row of 11 and posterior row 5 short setae (Fig. 4B). Abdominal ventrite 6 with 6-8 lateral striae on each side. Median lobe larger. Its apex strongly concave and symmetric in ventral view and with truncate margin more strongly curved in lateral view (Fig. 4C, D). Subdistal part of paramere larger, with flattened setae thinner and less numerous (Fig. 4E).

Female: Antennae simple, abdominal ventrite 6 broadly rounded apically, without striae.

Comparation with the other subspecies.

Exocelina manokwariensis batanta ssp. n. can be separated from all other subspecies by its less numerous and thinner flattened setae of the subdistal part of the paramere and the apex of the median lobe being strongly concave and symmetric in ventral view.

Distribution.

Indonesia: West Papua Province: Raja Ampat Regency, Batanta Island and the northern part of Salawati Island (misspelled as Salawatti on labels) (Fig. 9). Exocelina manokwariensis batanta ssp. n. is the only known Exocelina species in these islands.

Etymology.

The species is named for the Batanta Island, where it was discovered. The name is a noun in the nominative singular standing in apposition.