Exocelina bundiensis Shaverdo, Hendrich & Balke

Shaverdo, Helena V., Surbakti, Suriani, Hendrich, Lars & Balke, Michael, 2012, Introduction of the Exocelina ekari-group with descriptions of 22 new species from New Guinea (Coleoptera, Dytiscidae, Copelatinae), ZooKeys 250, pp. 1-76 : 11-12

8. Exocelina bundiensis Shaverdo, Hendrich & Balke sp. n. Figs 6 A–E, 32

Type locality.

Papua New Guinea: Eastern Highlands Province, Akameku-Brahmin, Bismarck Range, 05°54.28'S, 145°22.27'E.

Type material.

Holotype: male "Papua New Guinea: Eastern Highlands, Akameku-Brahmin, Bismarck Range, 1900m, 23.xi.1994, 05.54.284S, 145.22.271E, Balke & Kinibel (PNG 108)" (ZSM). Paratypes: Eastern Highlands: 46 males, 19 females with same labels as the holotype, one of them additionally with a green label "DNA M.Balke 1398" (NARI, NHMW, ZSM). 36 males, 25 females "Papua New Guinea: Eastern Highlands, Akameku-Brahmin, Bismarck Range, 1500m, 24.xi.1994, 05.51.964S, 145.23.604E, Balke & Kinibel (PNG 111)" (NHMW, ZSM). Madang: 2 males "PAPUA NEW GUINEA: Madang, Bundi small streams Jun 25/91 Larson" (ANIC, NHMW).

Diagnosis.

Beetles small, dark brown, dorsally less strongly punctate than Exocelina hansferyi , submatt; pronotum with lateral bead; male antennomeres 3-5 enlarged, 6-8 slightly enlarged; male protarsomere 4 with middle-sized, slender, evidently curved anterolateral hook; median lobe with strong submedian constriction and proximal part narrower, apex of median lobe narrower in lateral view; paramere with distinct notch on dorsal side and subdistal part elongate, with less numerous, long, thin setae.

Description.

Size and shape: Beetle small (TL-H 3.3-3.7 mm, TL 3.6-4.1 mm, MW 1.9-2.1 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dark brown with reddish brown anterior margin of head, lateral sides and posterior margin of pronotum, head appendages, and legs (Fig. 32).

Surface sculpture: Similar to Exocelina hansferyi , but with less strong punctation and microreticulation. Head with very dense punctation (spaces between punctures 1-2 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures less than diameter of cells of microreticulation. Pronotum with finer, sparser punctation than on head. Elytra with finer, sparser and more evenly distributed punctation than on pronotum. Pronotum and elytra with rather strongly impressed microreticulation, dorsal surface, thus, submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal plates with longitudinal strioles and transverse wrinkles. Abdominal sternites with distinct microreticulation, strioles, and fine, rather dense punctation, coarser and denser on two last abdominal sternites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, without anterolateral extensions. Blade of prosternal process lanceolate, rather narrow, slightly convex, with distinct bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal sternite 7 slightly truncate apically.

Male: Antennomeres 3-5 enlarged, 6-8 slightly enlarged (Fig. 6A). Protarsomere 4 with middle-sized, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row (double apically) of 21 short setae and posterior row of 7 short setae (Fig. 6B). Abdominal sternite 7 with 7-11 lateral striae on each side. Median lobe with strong submedian constriction and proximal part narrower in ventral view, apex of median lobe narrower in lateral view (Figs 6C, D). Paramere with distinct notch on dorsal side and subdistal part elongate, with less numerous, long, thin setae (Fig. 6E).

Female: Antennae simple, abdominal sternite 7 without striae.

Distribution.

Papua New Guinea. The species is known from Madang and Eastern Highlands Provinces (Fig. 50).

Etymology.

The species is named after the village Bundi where it was discovered. The name is an adjective in the nominative singular.