Polydrusus (Polydrusus) kadleci, Borovec, Roman & Germann, Christoph, 2013

Borovec, Roman & Germann, Christoph, 2013, Two new species of Polydrusus (Polydrusus) from Turkey, Iran and Greece (Coleoptera: Curculionidae: Entiminae: Polydrusini), Zootaxa 3693 (1), pp. 75-84 : 76-78

Polydrusus (Polydrusus) kadleci sp. n.

( Figs 1, 2 , 7, 8 , 11)

HOLOTYPE. 3, SE Turkey, HOP Pass, 15 km NE Mardin, 37 32 N, 40 51 E, 16.V.2001, S. Kadlec lgt. Red label: Holotype Polydrusus (Polydrusus) kadleci sp. n. Borovec & Germann, 2013 (NMPC).

PARATYPES. 45 33ƤƤ, same data as holotype (CCG, NMPC, ZMUC, RBO); 1 3 1 Ƥ, TR vill. Mardin, Akresta Geçidi env., 30.4.– 2.5.2000, Josef Mertlík lgt. (RBO); 7 33ƤƤ, TR—prov. Mardin, Hop Gecidi, Mardin env., 11.- 14.5.2005, Z. Malinka lgt. (ZMA).

Additional material examined: 2 33 1 Ƥ, Iran, Lorestan, 5 km S Malavi, 795 m, 33 15 0 70 N, 0 47 49 764 E, 6.04.2011, leg. H. Mühle (CCG); 1 3, Iran, prov. Fārs, 11 km W Dašt-e Aržan, 22.iv.2002, S. Kadlec lgt. (RBO).

Length: 3.63–4.62 mm, holotype 3.94 mm.

Entire body light rusty brownish, only pronotum (except anterior and posterior borders) and head (except rostrum) blackish. Elytra densely covered by yellowish brown, light, elongate-oval adherent scales, almost concealing integument. Elytra with two obliquely transverse, slender stripes, consisting of whitish elongate-oval and rounded scales, those twice as wide as the elongate-oval ones. Each elytral interval with one regular, dense row of raised, parallel-sided, whitish setae, in males about as long as half of elytral interval in apical declivity; in females about as long as width of elytral interval in apical declivity. Pronotum and head with rostrum covered by similar adherent scales as elytra, but whitish, more densely packed on head and rostrum than on pronotum. Irregularly scattered, raised setae on pronotum, head and rostrum similar to those on elytral base, conspicuously prominent at outline of pronotum. Tibiae with long erect setae, conspicuously prominent at lateral border. Abdominal ventrites sparsely covered by piliform setae, only lateral parts of ventrites 1 and 2 densely covered by whitish oval scales.

Rostrum short and wide, 1.40–1.56 times as wide as long, weakly constricted near base, then parallel-sided. Epifrons parallel-sided, at base somewhat more slender than inner edges of eyes. Epistome small, inconspicuous, V-shaped, very finely keeled posteriorly. Antennal scrobes visible as furrows along entire rostral length in dorsal view; in lateral view perpendicularly curved, with sharply keeled edges, dorsal margin parallel with dorsal border of rostrum, reaching lower margin of eye, distance between eye and scrobe as wide as breadth of one adherent scale. Rostrum separated from rest of head by shallow, weakly arched transverse furrow. Interocular space slightly convex. Eyes moderately large, strongly vaulted, conspicuously prominent from outline of head.

Antennae short, moderately robust, in females more slender than in males. Scape robust, 1.1 times as long as funicle, at base and at middle significantly curved, at apex twice as wide as at base. In males, first antennomere 1.6 times as long as wide, 1.3–1.4 times as long as antennomere 2, which is 1.7–1.8 times as long as wide. Antennomeres 3–7 1.1 times as wide as long. In females, first antennomere 1.7 times as long as wide, 1.1 times as long as antennomere 2, which is twice as long as wide. Antennomeres 3 and 4 isodiametric, antennomeres 5–7 1.1– 1.2 times as wide as long. Club slender, 2.1–2.2 times as long as wide.

Pronotum 1.21–1.29 times as wide as long, widest in middle, slightly narrower at anterior border, shallowly constricted before both borders, with moderately rounded sides. Disc with very slender, longitudinal gap in middle, along entire length of pronotum, in several specimens hardly visible. Pronotum in lateral view moderately vaulted.

Scutellum small, rectangular-shaped.

Elytra 1.63–1.75 times as long as wide, with almost straight sides, parallel-sided, apex narrowly rounded. Elytra in lateral view moderately bulged. Striae narrow, punctured, intervals weakly bulged.

Legs slender, all femora edentate. All tibiae with long spiniform mucro. Tarsi in males more robust than in females. Tarsomere 2 in males isodiametric, tarsomere 3 1.3–1.4 times as wide as long and 1.8–1.9 times as wide as tarsomere 2. Ungular tarsomere 1.2 times as long as previous one. In females tarsomere 2 1.1 times as long as wide, tarsomere 3 1.6 times as wide as long and 1.6 times as wide as tarsomere 2. Ungular tarsomere 1.5 times as long as previous one.

Penis slender and long; in dorsal view widest at base; along entire length with somewhat concave sides, and with regularly tapered apex; apex with almost straight sides. In lateral view penis regularly curved, with regularly tapered, straight apex.

Female genitalia. Ventrite 8 with very long and slender apodeme, distinctly constricted before plate, Y-shaped at apex. Plate small, feebly sclerotised, subtrapezoidal. Hemisternite of ovipositor slender, tapered, with short apical styli, laterally prominent. Spermatheca C-shaped, with long and slender cornu, sub-isodiametric ramus and strikingly shorter and more slender nodulus.

Sexual dimorphism. Males have more robust segments of antennal funicle and tarsi than females, and also shorter raised elytral setae.

Variability. Specimens from both Iranian localities have longer raised elytral setae in both sexes, in comparison to specimens from the Turkish (type) locality.

Etymology. The species is dedicated to its collector, prematurely deceased Dr. Stanislav Kadlec, very good friend of the first author, and who enthusiastically visited Asia Minor many times and collected a lot of very interesting weevils.

Differential diagnosis. Based on its tibiae with long erect setae, conspicuously prominent at lateral border and its elytra with whitish stripes, P. kadleci sp. n. is similar to the following species: P. hirsutipennis Pic, 1908 (known from Turkey), P. korbi Reitter, 1908 (known from Turkey), P. ornatus Gyllenhal, 1834 (known from Crimea and Turkey), P. reitteri Stierlin, 1884 (known from Greece and Macedonia), and P. schwiegeri Reitter, 1908 (known from Bulgaria, Croatia, Greece and Serbia).

Polydrusus kadleci sp. n. differs from all those species by i) the robust antennal scape, S-shaped in basal half, by ii) the blackish pronotum and head, by iii) disc of pronotum with a very slender, longitudinal gap in the middle along the whole length of the pronotum, and by iv) the regularly tapered apex of the penis, not showing any concavity.

Figures

FIGURES 1 – 2. Polydrusus kadleci sp. n. dorsal view 1) male; 2) female.

FIGURES 7, 8, 11. Polydrusus kadleci sp. n. 7) Penis lateral view; 8) Ditto dorsal view; 11) spermatheca. Figs 9, 10, 12. Polydrusus wymanni sp. n. 9) Penis lateral view; 10) Ditto dorsal view; 12) spermatheca.