Calomicrus minutissimus Lopatin

Lopatin, I. K. & Konstantinov, A. S., 2009, New genera and species of leaf beetles (Coleoptera: Chrysomelidae) from China and South Korea, Zootaxa 2083 (1), pp. 1-18 : 11-12

Calomicrus minutissimus Lopatin , new species

( Figs 30–32 )

Holotype, male. China, Yunnan, env. Dali, Cangshan Mts. , 3700– 3500 m, forest trail, N 25E41'06" E 100°06'13", 06.VI.2002, A. Konstantinov & M. Volkovitsh ( IZAS) . Paratypes, 7 specimens with the same label as holotype (5 USNM, 2 ZMAS) .

Body length 2.7 mm. Body elongate, weakly widening posteriorly. Head, pronotum and ventral side of body black with light greenish-gold shine. Elytra dark green with metallic lustre, not as shiny as pronotum. Labrum reddish-brown, antennae and legs light yellow, metafemur and distal antennomeres darkened.

Frons and vertex covered with small and sparse punctures. Antennal calli convex, smooth, clearly separated from frons and vertex. Frontal ridge short, convex, forms triangle with anterofrontal ridge. Gena short. Labrum wide, with straight margin. Antennae longer than half of body length. Antennomere three as long as two, but slightly thinner.

Pronotum transverse, 2.6 times wider than long, with sides widely rounded, and maximum width in middle. Disc covered with small punctures, anteriorly distance between punctures greater that their diameter. Lateral sides of pronotum broadly explanate, with row of deep punctures merging with each other. Anterior and posterior corners blunt, latter slightly protruding.

Elytra 4.4 times longer than pronotum and 2.0 times longer than wide. Sides nearly parallel in anterior half. In posterior half, sides weakly widening and then narrowing towards apices. Elytral punctures much larger and denser than pronotal, arranged in closely situated striae. Diameter of punctures twice as great as distance between punctures. Elytral apex widely rounded. Apical slope with sparse and short hairs.

Pygidium narrowly triangular with rounded apex, covered with erected hairs. Legs thin with dense, erected setae. Claw with denticle. Aedeagus as in Figs 30–32 .

Comments: Calomicrus minutissimus may be separated from the Chinese species of the genus by its smaller body size, the dense punctation, and the shape of the aedeagus, which is straight in lateral view, cylindrical and bears a deep and sharply defined grove ventrally ( Figs 30, 31 ).

Etymology: The species name refers to the small size of the beetle body.

Figures

FIGURES 30–32. Calomicrus minutissimus, aedeagus. 30, ventral view; 31, dorsal view; 32, lateral view.