Dichorrhinus Desbrochers, 1875

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 : 9

Diagnosis: key to the species of Dichorrhinus Desbrochers, 1875

1. Elytra with shorter and adherent hairs. Scales on elytra elongate drop-shaped, green or brown to copper metallic, femora unarmed. Libya (Type locality: Cirene) .......................... freyi F. Solari, 1940

– Elytra with longer and semi-raised hairs. Scales on elytra more circular, green to greenish-bluish metallic.................................................................................................................................................2

2. Head stout, rostrum very short. Eyes smaller, antennae and legs reddish brown and short, femora unarmed ( Fig. 1E, J ). Aedeagus short, conical, obtuse-angled and pointed at tip ( Fig. 2R, S ). Syria, Lebanon (Type locality: Djebel Baalbeck) .................................. pseudoscythropus Desbrochers, 1875

– Rostrum longer. Eyes bigger and/or more bulged. Antennae and legs longer, at least femora darkened, and mostly at least metafemora toothed (remark: no teeth were found on femora of D. alziari sp. nov.; in D. geiseri sp. nov. there were always teeth varying from small and sharp to well pronounced and strong; in D. creticus and D. korbi there were all transitions from untoothed to small and sharp, toothed to strongly toothed)......................................................................................3

3. Antennae reddish brown, eyes big, semi-circular, protruding ( Fig. 1B, G ). Apex of aedeagus with very long spine ( Fig. 2P, Q ). Greece: Crete Island (= type locality) ......................... creticus (Faust, 1889)

– Antennae darkened, eyes otherwise, aedeagus different.......................................................................4

4. Eyes big, less than semi-circular, protruding, head as Fig. 1H . Aedeagus laterally constricted before apex. Apex with short and rounded (blunt) spine ( Fig. 2 A-F). Western Turkey, Greece: Samos Island (= type locality) .................................................................................... geiseri sp. nov.

– Eyes smaller and strongly protruding (almost or distinctly semi-circular). Tip of aedeagus different ( Fig. 2 G-O)...........................................................................................................................................5

5. Eyes protruding, distinctly semi-circular, slightly asymmetrically curved ( Fig. 1D, I ). Aedeagus broader, laterally slightly rounded, apex acute-angled and pointed ( Fig. 2 K-O). Turkey (Type locality: Amasia) .................................................................................................. korbi Schilsky, 1911

– Eyes protruding, less than semi-circular, symmetrically curved ( Fig. 1A, F ). Aedeagus slender, parallel-sided to concave, apex obtuse-angled and pointed ( Fig. 2 G-J). Cyprus (Type locality: Troodos Mts) ................................................................................................................... alziari sp. nov.

Further records

The seasonally early-appearing species of Dichorrhinus are rarely collected and published data is scarce. Therefore, I add the following records, registered during examinations for the present study:

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.