Exocelina weylandensis 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 : 33-34

25. Exocelina weylandensis Shaverdo, Hendrich & Balke sp. n. Figs 17 A–E, 43

Type locality.

Indonesia: Papua Province: Nabire/Paniai Regencies, road Nabire-Enarotali, 55th km, 03°29.80'S, 135°43.89'E.

Type material.

Holotype: male "IR90-11: W. New Guinea, Trek Nabire-Ilaga, km55, 19- 25.ix.1990, Balke" (NHMW). Paratypes: 8 males with the same label as the holotype (NHMW, ZSM), 1 male "IR 11" [hw] (ZSM). 6 males "W.-Neuguinea/Paniai Prov. Straße Nabire-Ilaga km 54 700m, 22.-25.9.1990/IR 11 leg: Balke & Hendrich" (CLH). 1 male "West New Guinea/Paniai Prov./IR 19 track Nabire-Ilaga km 54 Basecamp, 750-800m, 16.-27.7.1991 leg: Balke & Hendrich" (CLH). 1 male, 2 females "West New Guinea/Paniai Prov./IR 24 track Nabire-Ilaga km 54 Basecamp, 750m, 25.7.1991 leg: Balke & Hendrich" (CLH). 12 males "IRIAN JAYA: Paniai Prov. road Nabire-Ilaga, km 54 10.9.1996, 900m leg. M. Balke (96 # 19)", one of them additionally with a green label "DNA M.Balke 3259" (NHMW). 1 male "IRIAN JAYA: Paniai Prov. road Nabire-Ilaga, km 54 10.9.1996, 800m leg. M. Balke (96 # 20)" (NHMW). 17 males "Indonesia: Papua, Road Nabire-Enarotali KM 55, 774m, 22.x.2011, 03 29.796S 135 43.885E, Uncen (PAP09)" (MZB, NHMW, ZSM). 4 males "Indonesia: Papua, Road Nabire-Enarotali KM 60, 640m, 22.x.2011, 03 30.474S 135 42.611E, Uncen (PAP10)", one of them additionally with a label "DNA M. Balke 4908" (ZSM).

Additional material.

See in the paragraph of Exocelina irianensis sp. n., Exocelina ekari sp. n., and Exocelina kakapupu sp. n.

Diagnosis.

Beetle small, reddish-brown to brown, with paler head and pronotal sides, shiny; pronotum without lateral bead; male antennomeres 3-10 stout; protarsomere 4 with middle-sized, slender, evidently curved anterolateral hook; median lobe slender, with very weak submedian constriction in ventral view; paramere with notch on dorsal side and subdistal part short and small, with not numerous, relatively short, thick, flattened, slightly curved at apex setae.

Description.

Size and shape: Beetle small (TL-H 3.15-3.5 mm, TL 3.5-3.9 mm, MW 1.65-1.85 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head reddish to dark brown, usually paler anteriorly; pronotum dark brown, with reddish sides; elytra uniformly dark brown, except narrow reddish sutural bands; head appendages yellowish-red, legs darker, especially metathoracic legs (Fig. 43).

Surface sculpture: Punctation and microreticulation as in Exocelina irianensis sp. n.

Structures: Pronotum without lateral bead, in a very few specimens with indistinct traces of bead. Base of prosternum and neck of prosternal process with distinct ridge, without anterolateral extensions. Blade of prosternal process lanceolate, relatively broad, slightly convex, with distinct bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal sternite 7 broadly rounded apically.

Male: Antennomeres 3-10 stout (Fig. 17A). Protarsomere 4 with middle-sized, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 14 short setae and posterior row of 5 short setae (Fig. 17B). Abdominal sternite 7 with 3-8 lateral striae on each side. Median lobe slender, with very weak submedian constriction in ventral view (Fig. 17C). Paramere with notch on dorsal side and subdistal part short and small, with not numerous, relatively short, thick, flattened, slightly curved at apex setae (Fig. 17E).

Female: Antennae more slender, abdominal sternite 7 without striae.

Distribution.

Indonesia: Papua Province: Nabire and Paniai Regencies. This species is known only from the type locality area (Fig. 50).

Etymology.

Derived from the name of the range, Weyland, at the northern edge of which the type locality is situated. The species name is an adjective in the nominative singular.