Limnobaris martensi Korotyaev

Prena, Jens, Korotyaev, Boris, Wang, Zhiliang, Ren, Li, Liu, Ning & Zhang, Runzhi, 2014, A taxonomic revision of Limnobaris Bedel in the strict sense (Coleoptera, Curculionidae, Baridinae), with particular emphasis on the species found in China, ZooKeys 416, pp. 41-66 : 50-51

Taxon classification Animalia Coleoptera Curculionidae

Limnobaris martensi Korotyaev sp. n.

Diagnosis.

Limnobaris martensi is a shiny, almost entirely glabrous species that has just a few inconspicuous setae on the ventral side and the legs (Fig. 2). The slightly bulging apical section of the tenth interstria is nearly smooth in Limnobaris martensi but more or less serrated in the other glabrous species Limnobaris babai and Limnobaris elliptica . Very slender, abraded Limnobaris tibialis can be distinguished from Limnobaris martensi by the sharply pointed, more basally inserted male protibial projection and apically round penis (Figs 8, 10).

Description.

Rostrum as long as pronotum, weakly and evenly curved, cylindrical, parallel-sided in basal 2/3, slightly dilated to apex; depression before eyes very weak but distinct. Dorsal surface of rostrum evenly convex, with short striole at level of antennal insertion; shiny, with sparse minute round punctures. Sides of rostrum at base with denser and larger elongate punctures. Antennae inserted at 0.57 × length of rostrum from base, antennal scrobe shortly continued beyond base of antenna. Ventral margin of antennal scrobe merging with lateroventral edge of rostrum at half way to eye; dorsal margin of scrobe reaching eye. Scape of antenna slender, shortly widened at apex. First segment of funicle 1.5 × as long as wide, 2nd slightly longer than wide, 3rd weakly transverse, 4-7th moderately to strongly transverse. Base of club very broadly rounded, almost truncate, but clearly separated from broad 7th funicular segment, apex of club broadly rounded. Frons weakly convex, at anterior margin as broad as base of rostrum, slightly widened posteriad, shiny, with sparse small punctures. Vertex with reticulate microsculpture. Eyes large.

Pronotum 1.1 × as wide as long, parallel-sided in basal half, then weakly narrowed to shallow apical constriction. Base of pronotum feebly bisinuate. Disc weekly and evenly convex, sub-matt due to reticulate microsculpture, with rather sparse fine, somewhat angular, round or oblong punctures, separated usually by not less than own diameter, in some places by 2-3 × diameter. Median line without microreticulation and punctures. Scutellum shiny, nearly rectangular, feebly widened at base.

Elytra 1.8 × as long as wide, with well-pronounced humeri, parallel-sided in basal half, rather narrowly rounded at apex; sutural angle slightly sinuate. Disc flattened, with fairly abrupt declivity; preapical prominences very distinct. Striae deep and narrow, intervals flat, about 4 × as wide as striae, shiny, with 1 row of small punctures and much finer microreticulation than on pronotum. Intervals in many places distinctly impressed around sparse and inconspicuous punctures in striae.

Legs slender and fairly long. Fore tibia with large tooth slightly proximal of middle of inner surface, apex of tooth blunt (Fig. 4). 1st tarsite 1.5 × as long as wide, 2nd clearly transverse, rounded at sides, 3rd in fore tarsus 1.7 × as broad as 2nd. 5th tarsite slender, weakly widened toward apex, by one-half of its length projecting beyond lobes of 3rd tarsite. Length of claw 1.5 × width of claw-segment at apex. Penis as in Fig. 8, moderately bent ventrally at base and apex, basal apodemes shorter than in other species.

Body black; scape of antenna in basal 2/3 light brown, apical third of scape, 1st and base of 2nd segments of antennal funicle, and tarsi dark brown, humeral callus brownish. Upper side bare, legs with sparse short recumbent white setae, sides of abdomen with few inconspicuous setae.

Length of body 3.2 mm, width at shoulders 1.15 mm.

Distribution.

The only known specimen is from Eastern Nepal (Fig. 13).

Biology.

Unknown.

Material examined.

Holotype male: Nepal, 272, Taplejung Distr., Kabeli Khola, N Yamputhin, S-Hang, 1700-2200 m, Kulturland/Busch, 5 Sep. 1983, J. Martens and B. Daams (SMNS).

Etymology.

The species is named after Dr. Jochen Martens (Mainz).