Rasilinus grandidens, 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 : 99

Taxon classification Animalia Coleoptera Curculionidae

Rasilinus grandidens sp. n. Figs 4, 13, 22, 31, 40, 57 ‒60, 80, 93, 95, 117, 122, 127, 132

Diagnosis.

This species is unique among members of the genus in having a blunt, large tooth on the basal part of the tarsal claws. Forehead and basal part of rostrum with suboval, white scales. Elytral striae composed of irregular punctures, from third striae outwards punctures fused into irregular line. Apical part of suture with stripe composed of fine, pale scales.

Description.

Body length (lb)ca. 2.60 mm.

Body colour and vestiture (Fig. 4). Body generally blackish; legs dark brown; antennal scape orange, darkening toward apex; funicle and club dark brown. Elytral intervals with line of protruding, elongate, dark scales. First interval apically with indistinct line composed of white, minute, suboval scales. Hind femora with distinct transverse stripe composed of small, suboval, white scales.

Head, rostrum and antennae (Figs 22, 31, 40). Head transverse (hw/hlca. 1.50). Forehead flat. Eyes convex, weakly protruding above margin of head in lateral and dorsal views, longer than half total length of head (eyl/hlca. 0.80). Vertex without punctures, rough, matt. Rostrum less than twice its apical width (rl/arwca. 1.60), weakly curved; dorsal part with two types of scales: one short and adjacent and other elongate, strongly protruding. Funicle shorter than scape; desmomere 1 enlarged, elongate, as long as 2-4; 2 longer than 3; 3-5 subquadrate; 6-7 wider than long. Club 2 × as long as wide, as long as desmomeres 2-7.

Pronotum (Figs 13, 22). Subisodiametric (mpw/plca. 1.10); slightly broadened to base, apically distinctly narrowed; base slightly bisinuate. Surface distinctly rough, matt, with short scales directed forwards.

Elytra (Figs 13, 22). Elongate (el/mewca. 1.70), widest at about one–third of length, slightly tapering toward apex. Striae with subcircular, distinctive punctures, those of striae 1-2 fused into irregular line on their apical two thirds; striae 3-10 without distinctive punctures formed by shallow line. Intervals convex.

Legs (Figs 57-60, 80). Femora slender, fore unarmed, middle with small tooth, hind with relatively small and narrowed tooth. Tibiae elongate, slender, fore and middle straight, hind tibiae distinctive curved and slender, narrowed subapically. Claws strongly curved with broadened, acute basal tooth.

Abdomen (Fig. 93). Elongate, 1.30 × longer than wide. First suture obsolete along entire length, visible as thin line. Sutures between ventrites 2-5 distinctive, visible as strongly depressed line. Last ventrite subtriangular, widely rounded apically. Pygidium of female subtriangular, rounded apically; surface asetose with sparse punctures.

Female terminalia (Figs 95, 122, 127, 132). Sternite VIII with bifurcate base and pair of subquadrate lobes; apodeme strongly elongate. Abdominal tergite VIII subquadrate with parallel lateral margin. Apical margin widely rounded with very long, acute setae. Surface with sparse punctures. Ovipositor as in Fig. 122. Spermatheca as in Fig. 127.

Male. Unknown.

Measurements.

Holotype, ♀: apw 0.50; arw 0.25; bew 1.05; bpw 0.60; el 1.75; eyl 0.25; frw 0.15; hl 0.30; hw 0.45; lb 2.60; mew 1.05; mith 0.20; mpw 0.60; mth 0.25; pl 0.55; ptbl 0.60; ptbmw 0.10; rl 0.40; scl 0.45.

Type material.

Holotype, ♀ - 22°11'S / 165°17'E, Aoupinie, 900-950 m., gate–meteo st., 8.02.2004, leg. M. Wanat (MNHN).

Etymology.

The specific epithet derived from the Latin adjective grandis (big, large) and the noun dens (a tooth) and refers to the distinctly toothed claws. A noun in apposition.

Distribution.

New Caledonia (main island, north province).