Rasilinus bimaculatus, Mazur, Milosz A., 2016

Mazur, Milosz A., 2016, A new genus and nine new species of Eugnomini (Coleoptera, Curculionidae) from New Caledonia, ZooKeys 554, pp. 87-118 : 97-99

Taxon classification Animalia Coleoptera Curculionidae

Rasilinus bimaculatus sp. n. Figs 3, 12, 21, 30, 39, 46, 55 ‒57, 79, 88, 102, 109, 116

Diagnosis.

It differs from other members of the new genus in having two characteristic spots in the middle of elytra. Body elongate; head behind eyes wide and stout with parallel lateral margin of vertex, eyes hardly concave; claws strongly curved with prominent, acute basal tooth.

Description.

Body length (lb)ca. 3.30 mm.

Body colour and vestiture (Fig. 3). Pronotum and elytra dark brown; dorsal surface of rostrum covered with suboval, white scales, middle of rostrum with asetose line; underside of rostrum with white, elongate scales. Pair of white spots at the middle of elytra (at third intervals) composed of small, strongly imbricate, suboval, white scales; intervals with line of protruding, elongate, dark and white scales. Femora brown with darker base; tibiae and tarsi dark orange. Antennae uniformly brown with brighter club. Hind femora with distinct transverse stripe composed of small, suboval, white scales.

Head, rostrum and antennae (Figs 21, 30, 39). Head capsule subquadrate (hw/hlca. 1.00). Forehead flat. Eyes strongly convex, distinctly protruding above margin of head in dorsal and lateral views; half as long as head (eyl/hlca. 0.50). Vertex with distinctly, well isolated punctures. Rostrum short (rl/arwca. 1.30), weakly curved. Funicle shorter than scape; desmomere 1 elongate, almost as long as 2-4; 2 slightly longer than 3; 3 subquadrate; 4-7 wider than long. Club more than 2 × longer than wide; as long as desmomeres 2-7.

Pronotum (Figs 12, 21). Slightly shorter than wide (mpw/plca. 1.15); sides parallel, apically strongly narrowed; base bisinuate. Pronotal disc, when viewed laterally, more sloping towards head than elytra. Surface strongly rough with dense punctation, space between punctures with microsculpture, matt.

Elytra (Figs 12, 21). Widest across weakly protruding humeral calli, distinctly elongate (el/mewca. 1.75), apical two thirds regularly tapering to apex. Dorsal surface glabrous, shining. Striae with suboval, well-isolated punctures, from one third of length becoming less numerous towards apex. Intervals flat across entire length.

Legs (Figs 55-57, 79). Front and middle femora stout, weakly narrowed basally; fore femora with very small, middle with distinct tooth on ventral margin. Tooth on hind femora sharp and narrow. Front tibiae bisinuate, broadened apically; middle tibiae elongate, weakly bisinuate, not broadened apically; hind tibiae regular curved, slightly narrowed apically. Claws strongly curved with prominent, acute, basal tooth.

Abdomen (Fig. 46, 88). Weakly longer than maximal width, strongly narrowed to apex. First suture obsolete medially; sutures between ventrites 2-5 wide and strongly depressed. Last ventrite almost 2 × as wide as long with distinct, suboval cavity at middle; margin of cavity at anterior half with strongly elongate, bright setae, similar setae (but more sparse) on whole apical margin of last ventrite. Pygidium of male longer than wide, dorsal surface with sparse punctation; apical margin with elongate setae; ventral processes suboval with elongate setae at basal part and apical margin.

Male terminalia (Figs 102, 109, 116). Aedegal pedon shorter than apodemes, basally fully sclerotised and broadened, medially slightly narrowed; apex truncate, widely rounded. From lateral view distinctly broadened medially. Internal sac with single kidney shaped sclerite. Apodeme of sternite VIII strongly broadened and curved apically in lateral view, basal part arrow shaped; sternite IX with pair of clearly visible, subtriangular sclerites. Apodeme of tegmen broadened apically, longer than parameroid lobe, which is not completely divided.

Female. Unknown

Measurements.

Holotype, ♂: apw 0.60; arw 0.35; bew 1.35; bpw 0.85; el 2.30; eyl 0.25; frw 0.20; hl 0.50; hw 0.55; lb 3.35; mew 1.35; mith 0.25; mpw 0.80; mth 0.45; pl 0.70; ptbl 0.75; ptbmw 0.15; rl 0.45; scl 0.60.

Type material.

Holotype, ♂- No. 1194, 22°24.0'S × 164°31'E, 580 m., Mandjelia, lower creek, 12-13 Dec 2004, rainforest, leg. G.B. Monteith, beating (MNHN).

Etymology.

From the Latin prefix bi– (two), and noun macula (spot), refers to the two characteristic spots in the middle of the elytra. An adjective.

Distribution.

New Caledonia (main island, north province).