Exocelina eme 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 : 15-16

11. Exocelina eme Shaverdo, Hendrich & Balke sp. n. Figs 20 A–E, 46

Type locality.

Indonesia: Papua Province: Jayawijaya Regency, Emdoman, 04°14'S, 139°55'E.

Type material.

Holotype: male "IRIAN JAYA: 29.9.1993 Eme Gebiet Emdoman, 800m", "ca. 139°55'E, 04°14'S leg. M. Balke (24)" (NHMW). Paratypes: 1 male, 1 female with the same label as the holotype (NHMW). 1 female "IRIAN JAYA: 29.9.1993 Eme Gebiet Emdoman, 800-1000m", "ca. 139°55'E, 04°14'S leg. M. Balke (25)", "DNA M.Balke 3257" [green label] (NHMW).

Diagnosis.

Beetle small, piceous, shiny; pronotum without lateral bead; male antennomeres 3-10 slightly stout; male protarsomere 4 with large, thick, strongly curved anterolateral hook; median lobe with weak submedian constriction in ventral view; paramere with notch on dorsal side and subdistal part elongate, with upper setae thin and less numerous and lower setae long, thick, somewhat flattend, and curved at apex.

Description.

Size and shape: Beetle small (TL-H 3.4-3.45 mm, TL 3.85-3.9 mm, MW 1.75-1.9 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head piceous, reddish-brown to dark brown anteriorly; pronotum piceous, with reddish-brown to dark brown sides; elytra piceous, with dark brown sutural bands; head appendages yellow to yellowish-red, legs distally darker, to dark brown (Fig. 46).

Surface sculpture: Head with dense punctation (spaces between punctures 1-3 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures smaller than diameter of cells of microreticulation. Pronotum with much finer and sparser punctation than on head. Elytra with very sparse and fine punctation, almost invisible. Head, pronotum, and elytra with weakly impressed microreticulation, dorsal surface, thus, shiny. 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 sparse punctation, coarser and denser on two last abdominal sternites.

Structures: Pronotum without lateral bead or with weak traces of lateral bead in females. Base of prosternum and neck of prosternal process with distinct ridge, anteriorly smooth, without anterolateral extensions. Blade of prosternal process lanceolate, narrow, 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 slightly stout (Fig. 20A). Protarsomere 4 with large, thick, strongly curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 14 short setae and posterior row of 6 short setae (Fig. 20B). Abdominal sternite 7 with 5-8 lateral striae on each side. Median lobe with weak submedian constriction in ventral view (Fig. 20C). Paramere with notch on dorsal side and subdistal part elongate, with upper setae thin and less numerous and lower setae long, thick, somewhat flattend, and curved at apex (Fig. 20E).

Female: Antenna slightly more slender; pronotum with weak traces of lateral bead; abdominal sternite 7 without striae.

Distribution.

Indonesia: Papua Province, Jayawijaya Regency. This species is known only from the type locality (Fig. 50).

Etymology.

The species is named for the Eme River, from a tributary of which it has been collected. The name is a noun in the nominative singular standing in apposition.