CHROMOSOME-NUMBER IN 9 BEETLE SPECIES (COLEOPTERA, BRUCHIDAE, APIONIDAE, CURCULIONIDAE)

Mitotic and meiotic chromosomes were studied in nine beetle species fr om three families, viz. Bruchidae: Bruchus pisorum (L.) (2n=34, no mal e=16+Xy); Apionidae: Legaricapion pisi (F.) (2n=22, n male=10+Xy(p)); Curculionidae: Otiorhynchus opulentus Germ., Polydrusus marginatus Ste ph., Polydrusus viridicinctus Gyll., Liophloeus lentus Germ., Liophloe us gibbus Bob. (2n=22; n male=10+Xyp), Larinodontes obtusus Gpll. (2n= 40, n male=19+Xy(p)), Zacladus geranii (Payk.) (2n=28, n male=13+Xy(p) ). In the first meiotic metaphase the heterochromosomes of eight exami ned species formed a typical parachute bivalent. The chromosome number and sex determining system of seven species were described for the fi rst time.