Longitarsus tishechkini Konstantinov

Konstantinov, Alexander S. & Lopatin, Igor K., 2000, Review Of The Longitarsus Asperifoliarum Group Of Species (Coleoptera: Chrysomelidae: Alticinae), The Coleopterists Bulletin 54 (2), pp. 200-220 : 214-215

Longitarsus tishechkini Konstantinov , new species

Figs. 49­50

Description. Body slightly convex. Length 1.64–1.80 mm, width 0.84–0.88 mm. Color dark brown with bronze reflection. Antenna and leg brown­ferrugineous, base of first antennomere and antennomeres 5–11 slightly darker. Metafemur dark brown with bronze reflection. Bases of pro­ and mesofemora light brown. Rest of legs reddish brown. Vertex strongly shagreened, with well developed supraorbital puncture above orbital sulcus surrounded by smaller punctures. Antennal callus poorly developed, not as high as vertex, not delineated from vertex. Surface of antennal calli moderately shiny, lacking sculpture. Midfrontal and suprafrontal sulci absent. Suprafrontal sulcus shallow. Frontal ridge high, convex in lateral view, moderately narrow. Anterofrontal ridge attached to end of frontal ridge, in middle as high but thinner than frontal ridge between antennal sockets. Second antennomere longer than third, same length as fourth. Pronotum width/length ratio 1.27, slightly wider basally. Lateral side convex, maximum width nearly in middle. Anterolateral callosity well developed, slightly lower anteriorly. Lateral margin forms poorly developed, triangular denticle in front of middle, narrowly explanated, explanations wider apically. Posterolateral callosity poorly developed, low, wide. Punctures round, small, shallow, poorly defined, 1.5–2.0 times smaller than interspaces. Interspaces strongly shagreened. Scutellum widely rounded on top. Elytron with well developed humeral callus, maximum width behind middle. Apex broadly rounded. Punctures much larger than those on pronotum, their diameter 1.5– 2.0 times larger than distance between them. Interspaces shiny, minutely shagreened. Male metatibia slightly curved in dorsal view. First metatarsomere of male 0.96 times longer than rest of tarsomeres together. Second metatarsomere of male as long as fourth and 1.57 times longer third. Tarsal claw thin, lacking denticle. Metatibial spur two times shorter than third metatarsomere. Median lobe of aedeagus slightly constricted in middle, with deep, extremely wide ventral groove. Bottom of groove membranous, with several longitudinal wrinkles. Apex triangular with narrow denticle ( Fig. 49 ).

Female unknown.

Variability. The male paratype has elytra lighter than specimen the holotype.

Comments. Longitarsus tishechkini is most similar to L. asperifoliarum from which it can be distinguished by its smaller size, shorter metatibial spur, absence of the supracallinal sulci, and extremely wide ventral groove of the median lobe.

Type material. Holotype?: Kazakhstan, Zaili Alatau , 24.VIII.1989, leg. A. Tishechkin ( USNM) . Paratype: Kazakhstan, Aksu­Dzhabagly, Aksu river , 22.V.1990, leg. A. Konstantinov (? ZMAS) .

Figures

Figs. 43–52. Median lobe of aedeagus. 43–48) Longitarsus marguzoricus Konstantinov; 49, 50) L. tishechkini Konstantinov; 51, 52) L. violentoides Konstantinov.