Eustenomacidius (Caucasohelops) svetlanae araxi Nabozhenko, 2006

Keskin, Bekir, Nabozhenko, Maxim V. & Keskin, Nurşen Alpagut, 2017, Eustenomacidius egeuniversitatis sp. n. - the first record of the tenebrionid genus in Turkey (Insecta: Coleoptera), Turkish Journal of Zoology 41 (4), pp. 237-240 : 239

Eustenomacidius (Caucasohelops) svetlanae araxi Nabozhenko, 2006

Nabozhenko, 2006: 819; Nabozhenko and Löbl, 2008: 241; Nabozhenko, 2009: 185; Abdurakhmanov and Nabozhenko, 2011: 138, 286.

Distribution. Azerbaijan (Nakhchivan), Iran (East Azerbaijan Province), Armenia (Vayots Dzor Province) ( Figure 1 ).

Eustenomacidius (Caucasohelops) egeuniversitatis sp. n.

Type material. Holotype ♂ ( ZDEU) and 17 paratypes (8♂♂, 2♀♀ in ZDEU; 3♂♂, 4♀♀ in ZIN): Turkey, Van Province, Erek Dağ , 2077–2600 m, N 38°25ʹ53.1ʺ, E 43°29ʹ03.6ʺ, 01.06.2013, leg. B. Keskin, M. V. and S. V. Nabozhenko, A. Pektaş ( Figure 1 ).

Description. Male. Body length 8.5–9.5 mm, body width 2.9–3.2 mm. Male. Body slender, flattened, darkbrown, shiny. Anterior margin of clypeus straight with projected angles. Head widest on eye level. Eyes small, not convex. Head width 1.5 times the width of interocular space. Genae strongly regularly rounded. Outer margin of head between gena and clypeus with distinct sinuation. Fronto-clypeal suture and clypeus depressed. Dorsal punctation of head coarse, moderately dense, punctures round, their diameter subequal to distance between them or a little longer. Ventral side of head with very coarse and dense elongate punctations that are merged as wrinkles. Temple grooves (lower aspect of eye having a posterior ventral groove) are absent. Antennae long (reaching 1/3 of elytral length), with four apical antennomeres extending beyond base of pronotum.

Pronotum trapezoidal or weakly cordiform, weakly transverse (1.08 times as wide as long), widest before middle, 1.2 times as wide as head. Lateral margins from weakly to moderately rounded, sinuated near posterior angles. Anterior margin straight, base weakly rounded. Anterior angles obtuse with narrowly rounded apex, posterior angles right with acute apex. All margins narrowly beaded, only anterior margin with interrupt in middle bead. Disc of pronotum regularly weakly convex, only near posterior angles flattened. Punctation of pronotum not coarse, moderately sparse (distance between punctures more than diameter of punctures). Prothorasic hypomera not flattened, with coarse sparse punctation and small wrinkles in base. Prosternal process almost horizontal, not convex.

Elytra oval (1.78 times as long as wide), basally wider than base of pronotum, 1.78 times as wide as head, 1.5 times as wide and 2.8 times as long as pronotum. Punctures in stria merged in entire deep furrows. Interstria strongly convex, with sparse and fine punctation. Epipleura and dorsal epipleural carina reaching elytral apex.

Wingless. Mesoventrite with transverse coarse punctation. Mesepimera with coarse and sparse punctation of round punctures. Metepisterna with less coarse punctation. Metaventrite slightly convex in anterior half, moderately coarse not dense punctuated. Abdominal ventrites bare, with fine, moderately coarse (puncture diameter subequal to distance between punctures) punctation. Abdominal ventrite 5 without depressions, not beaded apically.

Trochanters with one long seta. Femora and tibiae narrow, straight and long. Tarsi not widened, long:protibiae 1.44 times as long as protarsi; mesotibiae 1.1 times as long as mesotarsi; metatibiae 1.5 times as long as metatarsi ( Figure 2 ) (compare with female in Figure 3 ). Aedeagus: apical piece of the new species are ‘cylindronotoid’ type like E. svetlanae Nabozhenko, 2006 ( Figures 4–7 ), not bent laterally, dorso-ventrally flattened, long (near 3/4 length of basal piece), baculi of median piece not connected.

Female. Body length 8.9–11.8 mm, body width 3.2–4.4 mm. Body more robust. Antennae shorter (reaching 1/5 of elytral length), with only three apical antennomeres extending beyond base of pronotum. Pronotum wider (1.16–1.25 times as wide as long), 1.4 times as wide as head. Elytra wider and longer than in male, 1.75 times as long as wide, 2 times as wide as head, 1.45 times as wide and 3.15 times as long as pronotum ( Figure 3 ).

Etymology. The species is named in honor of the 60th anniversary of Ege University, İzmir.

Differential diagnosis. See the key. The species additionally differs from E. svetlanae araxi by reaching elytral apex epipleura, strongly convex interstriae and merged in deep furrow punctures.

Figures

Figures 1–3. 1) Eustenomacidius, general view and distribution; distribution of the subgenus Caucasohelops: triangle – E. svetlanae svetlanae; square – E. svetlanae araxi; circle – E. egeuniversitatis sp. n. 2) E. egeuniversitatis sp. n., male; 3) the same, female.

Figures 4–7. Male genitalia of Eustenomacidius egeuniversitatis sp. n. 4) aedeagus, ventral view; 5) aedeagus, lateral view; 6) inner sternite VIII; 7) gastral specula. Scale – 1 mm.