Arthrotus daliensis 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 : 5-6

Arthrotus daliensis Lopatin , new species

( Figs 14–16 )

Holotype male, China, Yunnan, Dali env., Cangshan Mts. , 2100 m, 22.V.2002, foothills with Cynoglossum , N 22°41'58" E 100°08 "07", leg. Konstantinov & Volkovitsh ( IZAS) . Paratypes 8 specimens with the same label as holotype (6 USNM, 2 ZMAS) .

Body length 5.3 mm, width 1.9 mm. Body elongate oval, shiny. Head, antennae, scutellum, band around elytral bases and their apices, ventral side, and legs black. Pronotum orange, rest of elytra yellow ochre.

Antennal calli small, separated from each other by narrow furrow and from vertex by shallow transverse impression. Frontal ridge convex. Antenna longer than half of body length. Proportion of antennomeres as follows: 8:4:3:12:12:12:13:12:10:10:10. Antennomere two wider than long. Antennomeres four to 10 wide at apices. Antennomeres four to 11 covered by semierected setae.

Pronotum trapezoidal, 1.8 times wider than long. Anterior corners rounded, posterior corners blunt. Lateral margins widely explanate, wider at corners. Border along basal margin narrow. Pronotal surface smooth, with light transverse impression behind middle, covered with tiny and sparse punctures on sides. Anterior setiferous pore situated slightly below anterior corner, posterior setiferous pore situated on top of posterolateral corner. Scutellum triangular, smooth.

Elytra 5 times as long as pronotum and 1.9 times as long as their width at humeral calli, slightly narrowing behind humeral calli and widening posteriorly. Elytral punctures moderately dense, more visible than those of pronotum.

Metatibia with thin, small spur. First protarsomere narrow. First metatarsomere longer than three following tarsomeres together. Last abdominal ventrite with three lobes, with rectangular middle lobe. Aedeagus as in Figs 14, 15 . Spermatheca as in Fig. 16 .

Comments: Arthrotus daliensis is similar to A. freyi Gressitt & Kimoto and can be differentiated from it by the round anterior corners of the pronotum (the anterior corners of the pronotum of A. freyi are slightly elongate laterally with a small denticle facing posteriorly), small punctures of the pronotum (the pronotum of A. freyi is covered with large and coarse punctures), the black tibiae (the tibiae of A. freyi are orange at least in part), and the shape of the aedeagus.

Etymology: The species name refers to its type locality.

Figures

FIGURES 14–16. Arthrotus daliensis. 14, aedeagus, ventral view; 15, aedeagus, lateral view; 16, spermatheca.