Exocelina rufa (Balke, 1998)

Shaverdo, Helena, Sagata, Katayo & Balke, Michael, 2016, Taxonomic revision of New Guinea diving beetles of the Exocelinadanae group, with the description of ten new species (Coleoptera, Dytiscidae, Copelatinae), ZooKeys 619, pp. 45-102 : 48-49

Taxon classification Animalia Coleoptera Dytiscidae

2. Exocelina rufa (Balke, 1998) Figs 1, 24

Copelatus (Papuadytes) rufus Balke, 1998: 335; Nilsson 2001: 77 (catalogue).

Papuadytes rufus (Balke, 1998): Nilsson and Fery 2006: 56 (comb. n.).

Exocelina rufa (Balke, 1998): Nilsson 2007: 34 (comb. n.).

Type locality.

Papua New Guinea: Morobe Province, Herzog Range, Wagau (Vagau), ca. 06°48'S; 146°48'E, ca. 1300 m a.s.l.

Type material studied.

Paratypes: 2 males "Stn. No. 150.", "New Guinea: Morobe Dist., Herzog Mts., Vagau, C.4,000ft. 4-17.i.1965", "M. E. Bacchus. B. M. 1965-120", "Paratypus Copelatus rufus sp.n. Balke des. 1997" [red] (NHMW).

Diagnosis.

Beetle small (TL-H 3.45-3.5 mm); reddish brown; matt, with dense, strong punctation and strongly impressed microreticulation; pronotum with distinct lateral bead; male antennomere 2 distinctly enlarged, antennomeres 3-6 stout (Fig. 24); protarsomere 4 with large, strongly curved anterolateral hook-like setae; male protarsomere 5 ventrally with anterior band of 23 and posterior row of 5 relatively long, thin setae (Fig. 1A); median lobe evenly curved, with slightly curved, elongate and broadly pointed in lateral view, evenly tapering, with broadly rounded apex (slightly truncate on very tip) in ventral view, on both lateral sides with numerous fine setae situated linearly on almost whole distal part of median lobe; paramere without notch, slightly concave on dorsal side and with dense, strong setae on subdistal part and fine proximal setae (Fig. 1 B–D).

Distribution.

Papua New Guinea: Morobe Province. The species is known only from the type locality (Fig. 40).