Genus Otiorhynchus Research Articles

Contribution to the knowledge of the weevil genus Otiorhynchus (Coleoptera, Curculionidae) from northeastern Turkey and Transcaucasia

Otiorhynchus (Podonebistus) korotyaevi sp. n., (Proremus) karsavurani sp. n., and O. (Proremus) temeli sp. n. from northeastern Turkey are described. O. kirschi is transferred from the genus Simo (= Homorhythmus) to the genus Otiorhynchus (subgenus Proremus); O. madari, from the genus Cirrorhynchus to the genus Otiorhynchus (subgenus Motilacanus); and O. kataevi, from the subgenus Nilepolemis to the subgenus Otismotilus. New data on the morphology and distribution of O. cataphractus, O. latinasus, O. terrifer, O. pipitzi, O. angustifrons, O. jarpachlinus, and O. sculptirostris are given. Lectotypes of O. lederi, O. erivanensis, O. diotus, O. terrifer, O. kirschi, and O. madari are designated.

Chromosome counts in some high altitudeOtiorhynchusGerm. species from Yugoslavia

SUMMARYChromosome numbers were recorded in eleven high altitude Otiorhynchus species from Yugoslavia. In nine specie (O. atripes, O. dryadis, O. speiseri, O. aurosignatus vlasuljensis, O. praecellens bosnarum, O. koritnicensis, O. alpicola atterimus, O. alpicola ssp., O. retifer, O. strumosus) chromosome numbers were found to be diploid: ♀, 2n = 20 +XX and ♂, 2n = 20 + XY, respectively. However, in two species, i.e., O. mendax and O. croaticus polyploid chromosome counts were observed. O. mendax populations consisted exclusively of tetraploid females (2n = 44), while O. croaticus comprised both male and female diploid and triploid female individuals (♀, 2n = 33). Since the coexistence of diploid and polyploid members within the same population is a rather rare event in the genus Otiorhynchus, the mechanism of origin of polyploid individuals was discussed.

NEW RECORDS OF OTIORHYNCHUS GERMAR SPECIES IN WESTERN NORTH AMERICA (COLEOPTERA: CURCULIONIDAE)

Seventeen species of the genus Otiorhynchus are known to occur in North America (including Greenland) (O'Brien and Wibmer 1982; Wibmer and O'Brien 1989). Warner and Negley (1976) provide a key to 16 species (not including O. monticola Germar, since recorded from Greenland) and provide information on distribution and natural history. All species occurring on mainland North America are known to be introduced. Whereas some of the species have broad distributions in North America, for example O. ovatus (L.), others are known from only a few adjacent localities. Species such as O. singularis (L.) and O. sulcatus (F.) are found in both western and eastern North America but not in intervening areas. Such distributions likely represent separate introductions.