Dichorrhinus korbi Schilsky, 1911

Germann, Christoph, 2013, A review of Dichorrhinus Desbrochers, 1875 (Coleoptera, Curculionidae) with two new species from Greece and Turkey, and from Cyprus, European Journal of Taxonomy 46 (46), pp. 1-13 : 7-8

Dichorrhinus korbi Schilsky, 1911

Figs 1D, I , 2 K-O, V

Dichorrhinus korbi Schilsky, 1911 : Nr. 54 (description).

not Phyllobius squamosus korbi Schilsky, 1908 : Nr. 48a [in Lona 1936: 491 (World catalogue); and in Weill et al. 2011 (faunistic list) as Dichorrhinus korbi Schilsky, 1908 (sic!)]

not Dichorrhinus korbi – Winkler 1924 -1932: 1467 (Palaearctic catalogue). — Solari 1940: 76 (comparison in description). — Pesarini 1980: 206 (survey on Phyllobiini ).

Remark

The description of Phyllobius squamosus korbi Schilsky, 1908 , and the missing entry of the description of Dichorrhinus korbi in Lona (1936) caused an uncertainty about the year of description of D. korbi . However, this is corrected here. The label data (see below) of the holotype of D. korbi deposited in the NFM is in accordance with the description ( Schilsky 1911). The examination of the holotype specimen, furthermore, revealed that the type is a female specimen, and not a male as written by Schilsky (1911) and repeated by Solari (1940).

Material examined

Holotype

♀, “ Amasia [printed]” // “[illegible handwriting]” // “[perhaps a female sign (!), handwritten]” // “Korbi * Schils. [handwritten]”. Red label: “Holotype Dichorrhinus korbi Schilsky, 1911 ett. Germann 2013” ( MFN).

Other material examined

1 ♂, 1 ♀, “TR-Antalya 70km s. Ulupinar 1992.04.30 50m leg. W. Suppantschitsch ” (cRB); 1 ♂, 2 ♀♀, “TR –vil Antalya 10.V.2001 Avlanbeli Pass 1120m 25 km S Elmali 3632 N 2959 E – S. Kadlec lgt.” (cSB); 1 ♂, 1 ♀, “ 26.05.2007 SW Turkey, Davras Dagi E Isparta, leg. P. Białooki ” (cPB); 4 ♂♂, 5 ♀♀, “11- 12.05.2008 SW Turkey, Akseki env., NE Manavgat , leg. P. Białooki ” (cPB); 9 ♂♂, 4 ♀♀, “ 24.05.2007 SW Turkey, Tahtali Dagi SW Kemer , leg. P. Białooki ” ( NMBE, cPB) .

Redescription

SIZE. (Without rostrum) males 4.5 mm (4.2-4.9 mm), females 4.8 mm (4.6-5.3 mm).

COLOUR. Body, head, femora and tibiae dark brown to black; nasal plate, antennae, tips of femora and basis of tibiae and all tarsal segments reddish-brown.

HEAD. Eyes strongly convex, very protruding, short oval in section. Rostrum about as long as wide, with well separated, glabrous and reddish-brown nasal plate, darkened in the middle; glossy from rostral dorsum to the scrobes. From there to epistome punctuate-striate. Head and basal half of rostrum with oval, green-metallic scales and long, partly bowed, dark hairs. Antennae reddish brown, second half of scape, partly funiculus and club slightly darker. Antennal scape long, bowed and slender, reaching fore margin of pronotum. Apex of scape thickened, three times wider than base. Seven segments of antennal funiculus as follows (L/W): 1: 3.0, 2: 3.8, 3: 2.7, 4 th to 6 th: 2.0, 7: 1.6. Club fusiform, long and slender.

PRONOTUM. (L/W): 0.7, transverse, widest in the middle, strongly constricted just before fore margin, sides weakly rounded. Densely and irregularly punctuate on disc, vestiture consisting of oval, metallic green scales and long, dark, bowed hairs.

ELYTRA. (L/W) males: 2.1, females: 1.8, parallel-sided. Base much wider than pronotum. Shoulders well pronounced. Striae linear and regularly punctuate, interstriae slightly wider. Vestiture consisting of green-metallic, broad, roundish scales, rounded and partly cut at hind margin, and long, semi-raised, dark hairs. Scutellum longer than wide, rounded at tip.

LEGS. Femora mostly with small, sharp teeth (at least meso- and metafemora). This character shows considerable variation in the examined specimens; teeth can also be completely reduced, tibiae straight. Four visible tarsal segments, 1 st segment 1.4 times longer than 2 nd, 3 rd slightly shorter, about twice as wide, 4 th segment tiny and hardly visible, 5 th reaching as far as 1 st. Claws fused at base, simple.

MALE GENITALIA ( Fig. 2 K-O). Sides of median lobe of aedeagus parallel, apex with long, triangular and pointed tip. Apodeme as long as median lobe. Tegmen with short parameres, tegminal apodeme straight, about two thirds as long as apodeme of aedeagus. Ventrite 8 slightly curved, little shorter than aedeagus.

FEMALE GENITALIA. Ventrite 8 with very long and slender apodeme. Spermatheca with pointed, broad, curved nodulus and broad, strongly curved cornu ( Fig. 2V ).

SEXUAL DIMORPHISM. Same as above.

Figures

Fig. 1. A-E. Habitus. F-J. Head and antennal scape of Dichorrhinus spp., ♂. — A, F. D. alziari sp. nov., holotype. — B, G. D. creticus (Faust, 1889). — C, H. D. geiseri sp. nov., holotype. — D, I. D. korbi Schilsky, 1911. — E, J. D. pseudoscythropus Desbrochers, 1875.

Fig. 2. A-F. Ventral view or aedeagus of Dichorrhinus geiseri sp. nov. A. Holotype. B-C. Denizli, Turkey. D-E. Fethyie, Turkey. F. Ören, Turkey. — G-J. Ditto of D. alziari sp. nov. G-I. Potami, Cyprus. J. Holotype. — K-O. Ditto of D. korbi Schilsky, 1911. K-L. Akseki, Turkey. M. Avlanbeli, Turkey. N. Davras, Turkey. O. Tahtali, Turkey. — P, Q. Ditto of D. creticus (Faust, 1889), Crete, Greece. — R-S. Ditto of D. pseudoscythropus Desbrochers, 1875, Sinfeh, Syria. — T-V. Spermatheca. T. D. geiseri sp. nov. U. D. alziari sp. nov. V. D. korbi, holotype.