Cylindrinotus charlesi Nabozhenko, 2015

Nabozhenko, Maxim, 2015, Review of the Genus Cylindrinotus Faldermann, 1837 (Coleoptera: Tenebrionidae: Helopini), The Coleopterists Bulletin (mo 14) 69, pp. 101-114 : 112-113

Cylindrinotus charlesi Nabozhenko , new species

( Figs. 7 , 26, 27 , 44, 45 , 58, 59 , 76, 77 )

Type Material. Holotype male at ZIN and paratypes 1 male and 7 females ( CN, ZIN), 10 paratypes ( ZDEU): “ Erzurum Province, Palandöken Dağları, N 39°50′05″, E 41°16′36″, 2550 m, 23.05. 2010, leg. M.V. and S.V. Nabozhenko, B. Keskin ”. Other paratypes: 1♂ with labels: “Pašaki, distr. Erzurum, 4.vii.1916, Mus. Caucas. 104-16, Vinokurov”, golden cirkle, “ Helops (Cylindronotus) pseudoconstrictus ” [handwritten label of A.V. Bogachev] ( ZM MSU). 1♂: Erzurum Province, Çat, 2400 m, 6.v.1998, leg. Bajdak ( SNMS); 3♂♂, 5♀♀: Erzurum Province, S slope of Kop pass, 2300 m, aspenrove, under Hesperis bicuspidata, 15.VI.2003, leg. B.A. Korotyaev ( ZIN); 1♂: Erzurum Province, 15 km N Aşkale, 2400 M., 7.vi.1999, leg. B.A. Korotyaev ( ZIN); 3♂♂, 1♀: env. Sarikamysh (now Kars Province, Sarıkamış ), 15.v.1914, leg. Poltoratsky ( ZIN); 3♂♂ with label in Russian: “Epиванская губерния, Зорское ущелье, Малюшенко” [now probably eastern Turkey, “Zorskoe canyon” is not a clear locality because “dzor” is “canyon” in Armenian] ( ZIN); 1♀: Anatolia or., Kop-dağ pass, 2200–2500 m, 29.vii.1973, leg. W. Heinz ( ZIN).

Description. Male. Body: Robust, dark brown, weakly shiny, pronotum shinier than elytra, legs and antennae light brown. Body length 8.5–10.0 mm. Head: Widest across eyes. Eyes widely separated, weakly convex. Head width 1.4 times width of interocular space. Anterior margin of frontoclypeus weakly bisinuate. Outer margin of head between gena and frontoclypeus with very weak sinuation. Genae rounded, dorsally with fine basal setation. Temples weakly rounded dorsally, not depressed near eyes. Fronto-clypeal depression weak. Punctation of head moderately coarse and sparse (puncture diameter less than distance between punctures). Antennae short, with only 1 apical antennomere extending beyond base of pronotum. Length/width ratio of antennomeres 2–11: 1.00, 2.50, 2.00, 1.80, 1.80, 1.85, 1.80, 1.50, 1.50, 1.30. Antennomere 3 2.5 times as long as antennomere 2 and 1.3 times as long as antennomere 4. Pronotum: Weakly transverse (1.12 times as wide as long), widest at middle. Lateral margins weakly rounded, rarely weakly sinuate near base; anterior margin weakly widely emarginate; base almost straight. Anterior angles obtuse, narrowly rounded apically; posterior angles weakly obtuse or straight, distinct. All margins beaded; lateral margins with thicker bead near base; anterior margin with interrupted bead at middle. Disc regularly convex, with flattened sides, rarely only flattened near base. Punctation of disc moderately coarse, sparser at middle (puncture diameter less than distance between them) and denser on sides (puncture diameter subequal or more than distance between them). Outer margins of hypomera narrowly flattened, with longitudinal wrinkles. Elytra: Elongate, oval, convex. Strial punctures elongate, fine, not merged in entire furrows. Interstriae flat, with sparse, fine punctation. Epipleura with smooth, transverse wrinkles. Epipleural carina completely visible dorsally. Venter: Mesoventrite and metepisterna with coarse, dense punctation. Metaventrite with short, recumbent setation medially. Abdominal ventrites finely punctate, with longitudinal, dense, fine wrinkles. Ventrites 1 and 2 with dense hair brush medially, ventrite 3 with small brush without distinct borders. Ventrite 5 not beaded apically. Legs: Protibia straight, evenly broad to apex, without deep emargination at base. Inner side of protibia with 3–4 large and some small teeth. Mesotibia weakly bent, with 2–3 teeth on inner side. Metatibia straight, without teeth. Protarsus strongly widened, protarsomeres 1–3 transverse; mesotibia weakly widened with longitudinal mesotarsomeres 1–3. Pro- and mesotarsomeres with dense brush of golden setae.

Female. Body more robust. Antennae shorter. Hair brushes on abdominal ventrites absent. Tibiae without teeth. Tarsi not widened.

Etymology. This species is named in honor of the famous entomologist Charles A. Triplehorn, who has made important contributions to our knowledge of darkling beetles.

Diagnosis. Cylindrinotus charlesi is similar to C. tchorokhicus , which also has flattened (but widely flattened) lateral pronotal margins. It differs, however, by not having merged strial punctures, pronotum widest at middle ( C. tchorokhicus is widest after middle) and form of male apical piece. It differs from C. constrictus by the regularly rounded, non-constricted temples behind the eyes, brown body, and form of male apical piece.

Bionomics. The species inhabits alpine zone from 2,000 to 2,600 m, where it occurs in meadows under stones.

KEY TO THE SPECIES OF ADULT CYLINDRINOTUS

FALDERMANN, 1837

1. Body bronze, with a metallic greenish shade ......................................................... C. batesi

1′. Body black or brown, without metallic shade......................................................................2

2. Anterior angles of pronotum protruding, acute. Prothoracic hypomera with longitudinal wrinkles and distinct punctation......... C. gibbosus

2′. Anterior angles of pronotum not protruding, right or obtuse, not acute apically. Prothoracic hypomera with wrinkles, without punctation...................................................................3

3. Inner side of male and female protibiae with deep emargination at base, parallel-sided in apical 2/3......................................................4

3′. Tibiae regularly broadened to apex, without deep emargination in base...........................5

4. Temples behind eyes completely constricted (in dorsal view). Anterior part of temples depressed entire length (in lateral view). Anterior margin of pronotum distinctly beaded. Elytral interstriae with dense coriaceous microsculpture and poorly visible punctation, elytra dull ...................... C. gibbicollis

4′. Temples behind eyes not completely constricted, dorsally rounded. Anterior part of temples depressed only near lower half of eyes. Anterior margin of pronotum often interrupted at middle bead. Elytral interstriae with poorly visible coriaceous microsculpture and distinct punctation; elytra moderately shiny .......................................................... C. erivanus

5. Body large, males slender and completely more or less shiny. Females with matte or dull elytra. Male gastral spicula strongly S-shaped (in lateral view), with thickened rods. Temples not constricted ................................................ 6

5′. Body not large, males and females robust. Males and females with equal shine. Male gastral spicula weakly bent (in lateral view) and with thin rods. Temples completely or not completely constricted...........................8

6. Pronotum widest at or before middle. Punctation of pronotal disc weakly but clearly elongate on sides .................................. C. nitidus

6′. Pronotum nearly trapezoidal, widest after middle. Punctation of pronotal disc not elongate on sides................................................7

7. Male protibia strongly bisinuate, meso- and metatibiae with thickening in basal third. Lateral margins of pronotum very weakly rounded, almost straight. Ratio of pronotal basal width to anterior width in females 1.3 ............................................ C. acutangulus

7′. Male protibia straight or slightly bisinuate on inner side; meso- and metatibiae without thickening in basal third. Lateral margins of pronotum completely weakly rounded. Ratio of pronotal basal width to anterior width in females 1.4–1.5 ........................ C. femoratus

8. Temples completely constricted, head width after eyes less than at level of posterior margin (in dorsal view).......................... C. constrictus

8′. Temples not completely constricted, with depression in lower half, dorsally regularly rounded, with subequal head width after eyes and on level of posterior margin (in dorsal view) ........................................................................... 9

9. Disc of pronotum widely flattened laterally. Bead thickened entire lateral margins. Elytral strial punctures connected with fine furrows. Body black .......................... C. tchorokhicus

9′. Disc of pronotum narrowly flattened laterally or flattened only in basal third. Bead thickened only near base and narrow on other marginal perimeter. Elytral strial punctures not connected with furrows. Body brown ........... ............................... C. charlesi , new species

Figures

Figs. 1–8. Cylindrinotus species, head. 1, 2) C. gibbicollis; 3, 4) C. erivanus; 5) C. constrictus; 6) C. gibbosus;

Figs. 11–27. Cylindrinotus species, legs. 11, 12) C. femoratus, male, metatibia; 13, 14) C. femoratus, male, meso- and protibiae, respectively; 15–17) C. acutangulus, male, meta-, meso-, and protibiae, respectively; 18, 19) C. gibbosus, male, meso- and protibiae, respectively; 20, 21) C. constrictus, protibia, male and female, respectively; 22, 23) C. erivanus, protibia, male and female, respectively; 24, 25) C. constrictus, male, pro- and mesotarsi, respectively; 26, 27) C. charlesi, male, pro- and mesotarsi, respectively.

Figs. 28–45. Cylindrinotus species, aedeagus. 28, 29) C. femoratus; 30, 31) C. acutangulus; 32, 33) C. nitidus; 34, 35) C. batesi; 36, 37) C. gibbicollis; 38, 39) C. erivanus; 40, 41) C. constrictus; 42, 43) C. gibbosus; 44, 45) C. charlesi. Even numbered figures = ventral view; odd numbered figures = lateral view.

Figs. 46–59. Cylindrinotus species, gastral spicula. 46, 47) C. femoratus; 48, 49) C. acutangulus; 50, 51) C. batesi; 52, 53) C. erivanus; 54, 55) C. constrictus; 56, 57) C. gibbosus; 58, 59) C. charlesi. Even numbered figures = ventral view; odd numbered figures = lateral view.

Figs. 68–77. Cylindrinotus species, habitus. 68) C. gibbicollis, male; 69) C. gibbicollis, female; 70) C. erivanus, female; 71) C. constrictus, male; 72) C. constrictus, female; 73) C. gibbosus, male; 74) C. gibbosus, female, holotype; 75) C. gibbosus, head and anterior part of pronotum; 76) C. charlesi, male, Palandöken Dağları; 77) C. charlesi, female.