Labidostomis damavandensis Rapilly, 1984

Bezděk, Jan, 2018, Contribution to the knowledge of the Clytrini of the Eastern Mediterranean, the Near East and the Arabian Peninsula, with descriptions of four new species (Coleoptera: Chrysomelidae: Cryptocephalinae), European Journal of Taxonomy 481, pp. 1-37 : 7-9

Labidostomis damavandensis Rapilly, 1984

Fig. 2

Labidostomis damavandensis Rapilly, 1984: 216 (original description).

Differential diagnosis

Labidostomis damavandensis is characterised by two spots on each elytron, one small on the humeral callus and one large in the outer part of the posterior half. In Iran and adjacent countries it can be compared only with L. elegans . The two species can be distinguished by the structure of the aedeagus, the structure of the male mandibles (dorsal keel obtuse and placed medially, lateral margins almost straight in L. elegans , dorsal keel sharp and placed along outer margins, lateral margins rounded in L. damavandensis ), the structure of the spermatheca and the elytral colouration (each elytron with a large metallic spot placed medially, suture narrowly yellow in L. elegans , large spot placed in outer part of posterior elytral half in Labidostomis damavandensis ) (compare Figs 2B, D and G with photographs and drawings of L. elegans in Bezděk 2018 ).

Material examined

Holotype

IRAN: 1 ♂, Fig. 2A , “IRAN Damavand (versant / sud), 3500 m., 15.VII.68 / P. MORVAN [w, h] // HOLOTYPE [r, p] // Museum Paris [p] / Coll. Générale [w, h] // Labidostomis dama - / vandensis Rapilly [h] / M. Rapilly dét. 19 [p] 82 [w, h]” ( MNHN).

Other material examined

IRAN: 1 ♀, Isfahan prov., Khunsar env., 2550 m a.s.l., 3 Jun. 2000, M. Kalabza leg. ( NMPC).

Type locality

IRAN: “Iran, Damavand (versant sud)” [southern slope of Damavand Mt., Mazandaran prov.].

Description of female

BODY LENGTH. 6.9 mm.

COLOURATION. Head, pronotum and scutellum dark metallic blue, labrum black with brownish anterior margin, mandibles black with base and apices brownish ( Fig. 2E ). Antennae: antennomeres I–IV orange, I darkened dorsally, V black with pale base, VI–XI black. Elytra yellow, each elytron with two black spots: small spot on humeral callus, larger elongate spot on outer side of posterior elytral half. Ventral side of body and legs black with slight metallic sheen, claws with paler base.

HEAD. ( Fig. 2F ). Anterior margin of labrum with wide shallow emargination and several short pale setae, additional longer pale setae placed on surface along anterior margin. Clypeus lustrous with sparse small punctures bearing pale setae, anterior clypeal margin with two small triangular divergent processes, margin between processes straight. Frons 4.33 times as wide as diameter of eye, with transversely elongate impression between eyes, covered with larger punctures mixed with transverse wrinkles and very short indistinct setae. Vertex moderately convex, around eyes with thin furrow, in middle with longitudinal impressed line, in middle of this line with one large elongate puncture, surface glabrous, lustrous, covered with sparse small punctures, basally tending to wrinkles. Antennae short, 0.22 times as long as body, length ratios of antennomeres I–XI equal to 10–5–6–6–6–5–5–5–5–5–10, antennomere I club-shaped, II subglobular, III and IV elongate, subparallel, antennae serrated from antennomere V, XI subapically emarginated from inner and outer sides.

PRONOTUM. Pronotum lustrous, glabrous, transverse, 1.96 times as wide as long, densely covered with small punctures. Anterior margin widely shallowly concave, lateral margins rounded, posterior margin nearly straight and moderately thickened in scutellar area. Lateral and posterior margins narrowly bordered, anterior margin bordered only in lateral thirds, border in middle part forming shallow rounded impression along the margin. Posterior angles nearly rectangular, distinctly elevated upon elytral level. Scutellum subtriangular with widely rounded tip, in basal half covered with small punctures and short setae, and with slightly elevated impunctate median line, apical half glabrous, with disappearing punctation towards apex, impressed along apex, scutellar apex not elevated upon elytral level.

ELYTRA. Elytra semicylindrical, parallel, 0.69 as long as body, 1.55 times as long as wide, glabrous, semiopaque, covered with dense confused small punctures mixed with very small punctures and with microsculpture, elytral apices almost impunctate. Basal margin with distinctly elevated sharp border disappearing near scutellum. Epipleura glabrous, impunctate, wide in humeral area, suddenly disappearing in basal 1/5 of elytral length. Lateral margin of elytra concave in lateral view.

LENGTH RATIOS. Length ratios of protarsomeres I–IV equal to 8–5–5–8, of metatarsomeres I–IV equal to 7–4–4–8. Claws narrow, simple, with angulate base.

SPERMATHECA. Vasculum extremely long and thin, base somewhat wider, gradually narrowed to apex. Bulbus as wide as base of vasculum, divided into two parts. Ductus spermathecae ca 2.5 times as long as vasculum, with many small loops, only distal part without loops, proximal part tangled ( Fig. 2G ).

Distribution

Iran.

Figures

Fig. 2. Labidostomis damavandensis Rapilly, 1984. A–D. Holotype, ♁, 6.5 mm (MNHN). A. Dorsal view. B. Head. C. Labels. D. Aedeagus in dorsal, lateral and ventral views. E–G. ♀, 5.6 mm (NMPC). E. Dorsal view. F. Head. G. Spermatheca.