Longitarsus danilevskyi, Konstantinov, Alexander S., 2005

Konstantinov, Alexander S., 2005, New species of Middle Asian Longitarsus Latreille with discussion of their subgeneric placement (Coleoptera: Chrysomelidae), Zootaxa 1056, pp. 19-42 : 25-26

Longitarsus danilevskyi sp. nov.

( Figs. 4 , 22–25)

Description. Length 1.41–2.00 mm, width 0.69–1.04 mm. Dorsum black with light bronze reflection, pronotum concolorous with elytra. Legs brown, pro­ and mesotibia lighter than pro­ and mesofemora, metafemur as dark as pro­ and mesofemora. Antennae brown, with 3 to 5 basal antennomeres slightly lighter.

Vertex strongly shagreened. Antennal callus as dark, but higher than vertex, not delineated from vertex by supracallinal sulcus. Surface of antennal calli shiny, lacking sculpture. Frontal ridge moderately wide and flat in lateral view, narrowing from middle to anterofrontal ridge. Anterofrontal ridge in middle thicker than frontal ridge. Second antennomere longer than third, as long as fourth.

Pronotum width/length ratio 1.31, wider basally than apically. Slightly convex laterally, without denticle, maximum width near base. Anterolateral callosity low, with obtuse denticle, much lower anteriorly than posteriorly. Posterolateral callosity low, wide. Punctures small, shallow, poorly defined. Interspaces shiny, without wrinkles or punctures.

Scutellum rounded on top. Elytron without humeral callus; maximum width in males nearly in middle, in females posterior to middle to near posterior margin. Apex greatly concave, more so in females than in males. Punctures larger than those on pronotum, their diameter slightly less than or about equal to interpunctal distance. Interspaces shiny, without wrinkles or punctures.

Male first protarsomere 1.33 times longer than wide, wide in middle, 1.00 times longer than second, 1.14 times longer than third and 0.66 times longer than fourth (visible) protarsomere. Male metatibia 4.77 times as long as wide, curved in dorsal view, with denticles directed posteriorly. First metatarsomere of male 2.04 times shorter than metatibia. Tarsal claw thin, lacking denticle. Metatibial spur as long as third metatarsomere.

Median lobe of aedeagus slightly narrowing in middle, with deep groove ventrally. Ventral groove of the median lobe narrowing abruptly to basal third of median lobe. Apex with wide, less developed denticle­like structure. In lateral view, apex strongly sinuous with impression at apical 0.25, tip curved ventrally. In lateral view, median lobe straight.

Spermatheca with receptacle wider posteriorly than anteriorly, separated from pump by distinct border. Internal side of receptacle convex, external slightly concave. Pump with vertical and horizontal parts well separated, vertical nearly as long as horizontal. Internal side of horizontal part sinuous. Spermathecal duct basally projecting in direction of receptacle, forming coils distally. Tignum arrowhead shaped posteriorly, wider than anteriorly, nearly parallel sided to anterior end, slightly widening there. Abdominal sternite 8 in female membranous apically and laterally. Vaginal palpus nearly straight medially, widening anteriorly, laterally forming an angle at posterior third. Abdominal tergites 1 to 3 completely sclerotized. Tergite 1 with clusters of deep pores laterally.

Comments. Longitarsus danilevskyi is most similar to L. igori from which it can be distinguished by the punctation on the pronotum being much finer than that on the elytra and the denticle­like structure on the apex of the median lobe of the aedeagus being wide and less developed than that in L. igori . ( Fig. 7 ).

Etymology. This species is named after Mikhail Danilevsky, who collected the only known specimens.

Type material. Holotype ɗ: Kazakhstan, 140 km NW Alma­Ata, Kolshengel, 600m, 15.IV.2002, Leg. M. Danilevsky (USNM). Paratypes 19 specimens with same label as holotype (17 USNM, 2 ZMAS).

Figures

FIGURES 3 – 11. Median lobe of aedeagus (ventral and lateral views). 3 ­ L. borisi, 4 ­ L. danilevskyi, 5 ­ L. excipennis, 6 ­ L. fuscoaeneus (Armenia). 7 ­ L. igori. 8 ­ L. josiphi. 9 ­ L. nadiae. 10 ­ L. pubescens. 11 ­ L. lederi.