Labidostomis (Labidostomis) daccordii, Regalin, 2017

Regalin, Renato, 2017, A review of Labidostomis species similar to L. longimana from southeastern Europe with descriptions of two new species from Greece and Turkey (Coleoptera: Chrysomelidae: Cryptocephalinae: Clytrini), Zootaxa 4317 (2), pp. 321-337 : 331-333

Labidostomis (Labidostomis) daccordii sp. nov.

( Figs 9 , 14 , 20 , 26 , 32 , 38 )

Type locality. Greece, Parnassos Mt. , Gerontovrachos.

Types examined. Holotype: ♂, “GREECE, Mt Parnassos / Gerontovrachos NW slope / 2050–2120 m, 4.VII.2002 / R. Regalin leg. [w, p] // collected on Trifolium / parnassi Boiss. / et Spruner [g, p]” (MSNM). Paratypes: 198 ♂♂ 47 ♀♀, same data (10 ♂♂ 5 ♀♀ in BMNH, 10 ♂♂ 5 ♀♀ in JBCB, 5 ♂♂ 3 ♀♀ in MDCV, 1 ♂ 1 ♀ in MMCM, 10 ♂♂ 5 ♀♀ in NMPC, 157 ♂♂ 25 ♀♀ in RRCA, 5 ♂♂ 3 ♀♀ in SZCM); 51 ♂♂ 74 ♀♀, “GREECE, Karpenissi / Mt Timfristos W slope / 1950 m, 5.VII.2002 / R. Regalin leg. [w, p] // collected on Trifolium / parnassi Boiss. / et Spruner [g, p]” (RRCA); 51 ♂♂ 24 ♀♀, “GREECE, Karpenissi / Mt Timfristos W slope / 1850–1950 m, 5.VII.2002 / R. Regalin leg. [w, p] // collected on / Onobrychis montana / subsp. scardica Halacsy [g, p]” (48 ♂♂ 22 ♀♀ in RRCA, 3 ♂♂ 2 ♀♀ in JBCB); 1 ♂, “GRAECIA m., 25.vi.2005 / GIONA Mts. / Kaloskopi env., subalpine / 1700–2100 m a.s.l. / S. Benedikt leg. [w, p] // Labidostomis (s. str.) /? graeca Tomov / det. F. Kantner 2006 [w, p]” (FKCC); 4 ♂♂ 3 ♀♀, “GR-IOANNINA, M. Papigo / Mt. Tymfi. Staz. 1450–1950 m. / VII.2006 M. Montagna leg. [w, p]” (MMCM, 1 ♂ in JBCB). The specimens are provided with one additional printed red label: “HOLOTYPUS, [or PARATYPUS, respectively], / Labidostomis / daccordii sp. nov., / J. Bezděk & / R. Regalin det., 2017”.

Description. Body length: ♂♂ 5.4–6.5 mm (holotype 5.5 mm); ♀♀ 4.9–5.1 mm.

Male ( Fig. 38 ). Head, pronotum, antennae, legs and ventral side of body metallic green. Labrum black with yellowish or brownish anterior margin. Ventral sides of antennomeres I–III pale. Elytra pale brown, with small black humeral spot with blurred margins.

Head and mandibles distinctly enlarged ( Fig. 26 ). Labrum with medially concave anterior margin, surface covered with very fine microsculpture, anterior margin with shorter pale setae, surface with two groups of five pores near incision and additional 2–3 pores laterally along anterior margin, all pores on surface bear longer pale setae. Clypeus laterally with small triangular processes with divergent tips and slightly convex middle of anterior margin, surface impressed, with distinct microsculpture, with two setigerous pores behind each lateral triangular process. Genae large, subtriangular, with large elongate punctures tending to wrinkles and with pale setae. Frons wide, glabrous, 3.70 times as wide as transverse diameter of eye, with large round impression covered with distinct microsculpture and around perimeter with larger punctures tending to wrinkles. Vertex moderately concave, around eyes slightly impressed, in middle with longitudinal impressed line, surface subobaque, microsculptured and covered with sparse small punctures, vertex glabrous except a group of setae behind each eye. Mandibles relatively short and robust, dorsal keels sharp, moderately rounded and slightly elevated, lateral side of left mandible triangular, surface even, covered with punctures with short pale setae, dorsal margin nearly straight. Antennae short, 0.32 times as long as body, length ratios of antennomeres I–XI equal to 14-6-7-8-9 -7-8-8-7-6-8, antennomere I club-shaped; II subglobular, III elongate, IV subtriangular, nearly as wide as long, distinctly wider than III, antennae serrated from antennomere V, apex of antennomere XI tridentate ( Fig. 32 ).

Pronotum transverse, 1.65 times as wide as long, widest in middle, strongly convex, lustrous, surface completely glabrous and covered with very fine microsculpture and irregular small punctures. Lateral and posterior margins bordered, anterior margin bordered only in lateral thirds, border in middle part form distinct rounded impression along the margin. One long pale seta placed on lateral margin near posterior corners. Anterior margin slightly concave, in middle shallowly emarginate, lateral margins moderately rounded, posterior margin straight in lateral thirds and protuberant in scutellar area. Posterior angles rectangular and strongly elevated above elytral base.

Scutellum elongate subtriangular, with widely rounded tip, surface with dense small punctures except smooth median line, scutellar apex slightly elevated upon elytral level.

Elytra semicylindrical, parallel, 0.55 as long as body, 1.44 times as long as wide, glabrous, dull, covered with microsculpture and densely with small confused punctures, elytral apices impunctate. Basal margin with border disappearing near scutellum. Epipleura glabrous, impunctate, wide in humeral area, suddenly disappearing in basal 1/5 of elytral length. Lateral margin of elytra shallowly concaved in lateral view.

Protarsi and protibiae prolonged. Protarsi: protarsomere I elongate, convergent in basal third, parallel in apical two thirds, 2.80 times as long as broad, protarsomeres II subtriangular, 1.63 times as long as broad, length ratios of protarsomeres I–IV equal to 14-9-7-9. Claws simple with angulate base.

Male genitalia. Aedeagus ( Fig. 9 ) very long, 0.38 times as long as body. Apical quarter convergent with slightly concave margins, apex subtriangular, widely rounded. Dorsal median impression distinctly concave with thin median keel, lateral sides rounded, surface of posterior apices slightly oblique. Apex of aedeagus with two inward triangular crooked folds, between folds is elongate sub-elliptical cavity for insertion of anterior sclerite. Operculum trapezoidal with anterior margin incised in middle. Visible part of non-everted anterior sclerite forming thin transverse base and thin long median process, concave plates are visible as large subtriangular structure. In lateral view, ventral side widely convex.

Everted aedeagus ( Fig. 20 ). Ejaculatory guide ring-like, with anterior margin invaded inwards. Lateral sclerites very small, hook-like. Anterior sclerite extremely large, forming two concave plates connected in basal suture.

Female. Head, mandibles and anterior legs not enlarged. Frons 3.80 times as wide as transverse diameter of eye. Pronotum more transverse, 1.80 times as wide as long. Protarsi much shorter and narrower than in males, length ratios of protarsomeres I–IV equal to 7-5-4-7. Spermatheca ( Fig. 14 ). Vasculum with widely round and convergent apical part and moderately S-shaped and wider basal part. Bulbus transverse, very wide, with subspherical glandular insertion. Ductus spermathecae ca. twice times as long as vasculum, proximal half well sclerotized, with about 10 coils, distal half relatively soft, distinctly wider towards bursa copulatrix, with three simple loops.

Variability. The basal half of the aedeagus of the population from Ioannina is comparatively shorter than in populations from Central Greece. Subapical lateral margin of aedeagus can slightly vary from nearly straight to distinctly concave.

Differential diagnosis. Labidostomis daccordii sp. nov. differs from all other species by specific structure of aedeagus which is extremely long, nearly 0.4 times as long as body, apical part with two inward folds and, particularly, apical sclerite is extremely enlarged, dorsal impression is strongly concave and ventral side of aedeagus remarkably convex ( Fig. 9 ). Other species discussed here have a comparatively shorter aedeagus. Distribution. Greece: Epirus and Central Greece.

Etymology. Dedicated to our good friend and specialist on Chrysomelinae, Mauro Daccordi (Verona, Italy). Host plants. All the specimens from Parnassos were collected on the Trifolium parnassi Boiss. & Spruner (Fabaceae) .

Figures

FIGURES 9 – 10. Aedeagus in dorsal, lateral and ventral views. 9 — Labidostomis daccordii sp. nov.; 10 — L. leonardii sp. nov. Scale bar: 0.5 mm.

FIGURES 11 – 15. Spermatheca. 11 — Labidostomis balcanica; 12 — L. longimana; 13 — L. tymphristica; 14 — L. daccordii sp. nov.; 15 — L. leonardii sp. nov. Scale bar: 0.25 mm.

FIGURES 19 – 21. Aedeagus with everted internal sac. 19 — Labidostomis tymphristica; 20 — L. daccordii sp. nov.; 21 — L. leonardii sp. nov. Not to scale.

FIGURES 22 – 27. Head and mandibles in frontal view. 22 — Labidostomis balcanica; 23 — L. graeca; 24 — L. longimana; 25 — L. tymphristica; 26 — L. daccordii sp. nov.; 27 — L. leonardii sp. nov. Not to scale.

FIGURES 28 – 33. Right male antenna. 28 — Labidostomis balcanica; 29 — L. graeca; 30 — L. longimana; 31 — L. tymphristica; 32 — L. daccordii sp. nov.; 33 — L. leonardii sp. nov. Not to scale.

FIGURES 34 – 39. Male habitus. 34 — Labidostomis balcanica (holotype, 7.6 mm); 35 — L. graeca (holotype, 6.7 mm); 36 — L. longimana (Bulgaria, 5.8 mm); 37 — L. tymphristica (holotype, 5.9 mm); 38 — L. daccordii sp. nov. (paratype, 6.5 mm); 39 — L. leonardii sp. nov. (holotype, 6.3 mm).