Karyotype analysis of three weevil species from the genera Brachysomus (Boheman, 1845) and Strophosoma Billberg, 1820 (Coleoptera, Curculionidae)
Languages of publication
The karyotype structure of Laena reitteri is described for the first time. The chromosome number 2n=18+1-3B and meioformula n%=8+Xyp+1-3B deviates from the modal tenebrionid number. The karyotype exhibits low variation in morphology and length. The diploid set consists of four long (subtelocentric and acrocentric), twelve medium-sized acrocentric autosomes and sex heterochromosomes Xy. The X chromosome is submeta- centric, while the y is acrocentric and the smallest element of the set. On mitotic and meiotic plates 1-3 small additional elements are also visible, and probably represent B The NORs are very active at mitotic prophase and early meiotic stages.
Publication order reference
Milada Holecova, Department of Zoology, Comenius University, Mlynska dolina B-1, 842-15 Bratislava, Slovakia