Odocnemis operta ( Reitter, 1922 )

Nabozhenko, Maxim & Keskin, Bekir, 2016, Revision of the genus Odocnemis Allard, 1876 (Coleoptera: Tenebrionidae: Helopini) from Turkey, the Caucasus and Iran with observations on feeding habits, Zootaxa 4202 (1), pp. 1-97 : 47-49

Odocnemis operta ( Reitter, 1922)

Figs. 25 , 46 E–G, 49

Cylindronotus (Odocnemis) opertus Reitter, 1922: 132 [in key]; Winkler 1928 –1929: 1018 [in catalogue]; Gebien 1943: 427 (806) [in catalogue].

Odocnemis opertus: Nabozhenko 2008: 37 [in catalogue]; Nabozhenko & Löbl 2008: 244 [in catalogue]; Nabozhenko & Keskin 2013: 69, 71.

Type material (studied). Lectotype (♂) (NMB): “Kadi köi” (printed), “Staud.” (handwritten), “ opertus ” (handwritten), “Rtt. det.” (handwritten), “Typus” (red, printed).

Other studied material. Turkey, Bolu Province, Mudanya District, Abant Dağı , 40°35′135″ N 31°15′ 894″E, 1260 m, 29.v.2009, leg. M.V. and S.V. Nabozhenko, B. Keskin, 2♂♂, 3♀♀ ( ZIN, CN), 8♂♂, 3♀♀ ( ZDEU) .

Redescription, male (holotype). Body length 9 mm, body width 2.7 mm. Body slender, moderately shining, brown. Head widest at level of eyes. Eyes large, convex. Ratio of head width at eyes to distance between eyes: 1.6. Genae strongly rounded basally (not angular). Lateral margin of head between gena and clypeus with very small weak emargination. Punctation of head coarse and dense, punctures round, merged. Head bare, only near eyes with very short setaetion. Antennae long (reaching almost 1/2 of elytral length), with 4 apical antennomeres extending beyond base of pronotum. Pronotum very weakly transverse (1.1 × as wide as long), widest before middle, 1.4 × as wide as head. Lateral margins weakly rounded and weakly sinuate basally. Anterior margin of pronotum weakly rounded at middle and weakly sinuate near angles. Anterior and posterior angles right, distinct on apex. All margins narrowly beaded. Disc strongly convex. Punctation of disc more dense in middle (diameter of punctures 1.5–2 × as wide as distance between punctures); punctation on margins coarse and sparse (diameter of punctures subequal to distance between punctures); punctures rounded in middle and near margins and strongly elongated, merged in wrinkles on sides. Hypomera with longitudinal wrinkles, not flattened on lateral margins. Elytra moderately elongated (1.7 × as long as wide), widest behind middle, 1.35 × as wide and 2.5 × as long as pronotum, 2 × as wide as head. Lateral margins of elytra weakly sinuate near base and apex. Strial punctures merged in entire deep furrows. Elytral intervals flat, with fine and sparse punctation and distinct tubercles. Eighth intervals apically narrow and connected with margin of elytra and 2nd interval. Epipleural carinae completely visible dorsally; epipleuron not reaching elytral apex. Ventral side. Metaventrite with coarse and dense punctation and recumbent setaetion. Abdominal ventrites with fine and sparse punctation in middle and more coarse punctation on sides. All abdominal ventrites covered with short and fine recumbent hairs. Ventrite 1 with dense hair brush in middle; ventrite 5 beaded apically. Legs slender, elongated. Inner side of femora pubescent basally and smooth and bare in apical 1/3. Protibiae straight, with 5 large teeth on inner side; mesotibiae weakly curved, without teeth; metatibiae straight, without teeth.

Description, female. Body length 12–16 mm, body width 4–7.4 mm. Pronotum more transverse (1.4 × as wide as long). Elytra wider (1.6 × as long as wide), 2 × as wide as pronotum. Abdominal ventrite 5 without depression. Antennae shorter (reaching 1/4 of elytral length), only 3 apical antennomeres extending beyond base of pronotum.

Comments. The holotype is only a pygmy male of this species. Other specimens have large (body length 12– 17 mm) sclerotized black body and more developed characters of tibial dentation.

Bionomics. O. operta and O. protina are sympatric species. These two species have different life styles and times of activity. O. protina is typical Odocnemis with small shiny ‘nalassoid’ body, which feeds on small foliose epiphytic lichens on many trees ( Quercus robur , Q. cerris , Picea etc.) from 20:00 to 23:00. O. operta has a Probaticus - type large, strongly sclerotized body and feeds on fruticose lichens only on relict Quercus cerris after 23:00.

Figures

FIGURE 25. O. operta, male. A) Head. B) Pronotum. C) Protibia. D) Mesotibia. E) Metatibia. F) Aedeagus, ventral view. G) Aedeagus, lateral view. H) Inner sternite VIII. I) Gastral spicula. J) Protibia. K) Mesotibia. A – E) holotype (pygmy male). F – K) Normal male from Abant Dağı. Scale bars— 1 mm.