Longitarsus violentus Weise, 1893

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 : 216-219

Longitarsus violentus Weise

Figs. 16 , 22, 26, 30, 53–60

Longitarsus violentus Weise 1882 –1993 (1893):1016 (Type locality: Caucasus. Lectotype in ZMHU, designated here). Heikertinger, 1914:258 (figures of? genitalia, distinguishing features, distribution). Lopatin 1977:212, 1984:322 (key, figures of? genitalia, distribution).

Description. Body slightly convex. Length 2.4 mm, width 1.04 mm. Color dark brown with strong bronze reflection. Antenna and leg light brown or reddish­ferrugineous, first antennomere and antennomeres 5–11 slightly darker. Metafemur dark brown with strong bronze reflection. Pro­ and mesofemora basally brown, apically reddish brown. Vertex strongly shagreened, with single, well developed supraorbital puncture above orbital sulcus. Antennal callus poorly developed, not higher than vertex, not delineated from vertex by grooves. Surface of antennal calli moderately shiny, lacking sculpture. Mid­ frontal and suprafrontal sulci absent. Frontal ridge high, convex in lateral view, moderately narrow (distance between antennal sockets slightly greater than diameter of antennal socket). Anterofrontal ridge attached to end of frontal ridge, in middle as high and as thick as frontal ridge. Second antennomere slightly longer than third, as long as fourth. Pronotum length/width ratio 1.42, slightly wider basally. Lateral side slightly convex, with maximum width nearly in middle. Anterolateral callosity well developed, slightly lower anteriorly. Lateral margin narrowly explanated, explanation wider apically. Posterolateral callosity poorly developed, low, wide. Punctures, poorly defined, shallow, moderately large, as large as interspaces. Interspaces strongly shagreened. Scutellum widely rounded on top. Elytron with well developed humeral callus, maximum width behind middle. Apex broadly rounded. Punctures as large as those on pronotum, their diameter slightly smaller than distance between them. Interspaces minutely shagreened. Male metatibia slightly concave in dorsal view. First metatarsomere of male 1.05 times longer than rest of segments together. Second metatarsomere of male 1.17 times longer than fourth and 2 times longer than third. Metatibial spur smaller than third metatarsomere. Tarsal claw thin, lacking denticle. Median lobe of aedeagus parallel sided, with deep, wide ventral groove. Bottom of groove membranous, with several well developed longitudinal wrinkles. Apex more or less flat, with moderately wide denticle ( Figs. 53–59 ). Preapical abdominal tergite of female lacking long setae. Distal half of preapical abdominal tergite densely covered with short setae, basal half without pores ( Fig. 16 ). Apical abdominal tergite covered with long setae. Microtrichia situated in middle and in lateral corners near spiracles ( Fig. 16 ). Receptacle of spermatheca (Fig. 22) only slightly longer than pump. Inner side of receptacle convex, outer side nearly straight. Vertical part of pump short, well delineated from receptacle and from horizontal part of pump. Spermathecal duct basally pointed in same direction as receptacle, making loop away from receptacle forming several coils apically. Tignum slender, straight, pointed posteriorly ( Fig. 26 ). Vaginal palpus slender, posteriorly slightly curved medially, broadly rounded at apex ( Fig. 30 ). Apical sclerotization acute.

Variability. Specimens from Ural region have thin and shallow but quite visible supracallinal sulcus. In specimens from Kharog Botanical Garden ( Tadzhikistan) antennal calli are not separated from vertex, but their surface is slightly raised above vertex; and interspaces of elytra covered with tiny, poorly developed punctures. Specimens from Naryn have shiny vertex lacking any wrinkles or punctures. Specimens from Altai have punctures on pronotum much smaller than those on elytra. A few specimens from Irkutsk region have less developed humeral callus. Median lobe is quite variable in this species. The shape of ventral groove varies from almost parallel sided in middle and abruptly narrowing at base to gradually narrowing basally ( Figs. 53, 55–60 ). The shape of the apex varies in the same way as in L. marguzoricus .

Comments. In the original description Weise compared this species with his previously described L. asperifoliarum and mentioned that he had at least 2 specimens, one of which was male. Heikertinger studied several specimens of L. violentus from Caucasus, Turkmenia, Kirgizia, Kazakhstan, and Mongolia, including the syntypes ( Heikertinger 1914:259). He provided figures of the male genitalia and discussed the differences between this species and L. asperifoliarum .

Longitarsus violentus can be separated from most of the species of the asperifoliarum group by the presence of lateral microtrichia on the last abdom­ inal tergite of female ( Fig. 16 ) and by the slender median lobe of aedeagus having a less convex apical part in lateral view ( Figs. 53–60 ).

Type material. Lectotype /: ‘‘Kaukas, Leder, violentus Ws. ; ex. coll. Weise, Zool. Mus. Berlin;’’ Lectotypus Long. violentus design. I. Lopatin ( ZMHU) .

Material. Georgia: East Georgia, Vashlavankii Reserve , 14. V.1975, leg. I. Lopatin (2? ILPC). Kazakhstan: Temir u. Ural region, ur. Kuzha­Tugai . 13. VI .1908 , leg. D. Borodin and B. Uvarov (? ZMAS). Tallskii Alatau, Aksu­ Dzhabagly , 19. V.1990, leg. A. Konstantinov (? AKPC). Mongolia: Central Aimak, 15 km NE Mungen Mor’ta, Kerulen river , 12­21. VI .1979 , leg. L. Medvedev & N. Voronova (? USNM); Central Aimak , Ulan Bator, 1500–1800 m, 22­23.VII.1965, leg. Z. Kaszab, det. I Lopatin (? USNM); Central Aimak, northern slope of Bogdoul , near Ulan Bator , 29. VI .1967 , leg. I. Kerzhner, det. I. Lopatin (? USNM); same data as previous specimen except 14.VII.1967, leg. Emel’yanov, det. I. Lopatin (/ USNM); Central Aimak , 10 km W Somon Delgerchaan, 1250 m , 24.VIII. 1965, leg. Z. Kaszab (2 / USNM) . Russia: or. Samara, litus dexter Volga , 2.XI.1929, leg. A. Lubischew (? ZMAS). Svyatogorsk, Stalinsk. region ( Donetsk region ) , 10. VI .1941 , leg. A. Lubischew (? ZMAS). Altai, Kosh­Agach , 18. VI .1989 , leg. S. Saluk (3? AKPC). Altai, Ongudai , 4. VI .1989 , leg. S. Saluk (? AKPC). Irkutsk region, Baikal Lake, Sagan Zoba , 09.VII.1998, leg. A Konstantinov (25?, 26 / USNM). Irkutsk region, Ust’Orda territory, between Tikhonovka and Bokhan , 06.VII.1998, leg. A. Konstantinov (2?, 4 / USNM). Novosibirsk region, Karasuk territory , 29. VI.1998, leg. A Konstantinov (3?, 3 / USNM). Uzbekistan: Middle part of Naryn River, foothills of Naryn ridge , 11.VII.1966, leg. V . F. Palij (2? AKPC) .

Figures

Figs. 13–16. Last abdominal tergites of female. 13) Longitarsus asperifoliarum Weise; 14) L. marguzoricus Konstantinov; 15) L. violentoides Konstantinov; 16) L. violentus Weise.

Figs. 53–60. Median lobe of aedeagus of Longitarsus violentus Weise. 53, 54) Svyatogorsk region, Russia; 55) Samara region, Russia; 56, 57) Altai, Russia; 58) Naryn, Uzbekistan; 59) Kharog, Tadzhikistan; 60) Baikal Lake, Siberia, Russia.

Figs. 23–26. Tignum (8th abdominal sternite of female). 23) Longitarsus asperifoliarum Weise; 24) L. marguzoricus Konstantinov; 25) L. violentoides Konstantinov; 26) L. violentus Weise.

Figs. 27–30. Vaginal palpi. 27) Longitarsus asperifoliarum Weise; 28) L. marguzoricus Konstantinov; 29) L. violentoides Konstantinov; 30) L. violentus Weise.