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The ladybird    Henosepilachna   argus    Geoffroy, 1762 has been cytogenetically studied. In addition we have conducted a review of chromosome numbers and the chromosomal system of sex determination available in the literature in species belonging to the genus    Henosepilachna    and in its closely related genus    Epilachna   . Chromosome number of    H.   argus    was 2n=18, including the sex chromosome pair, a common diploid chromosome number within the tribe   Epilachnini  . The study of prophase I meiotic chromosomes showed the typical Xy p  “parachute” bivalent as in the majority of species of   Coccinellidae  . C-banding and fluorescent staining with AT-specific DAPI fluorochrome dye have been carried out for the first time in H. argus. C-banding technique revealed that heterochromatic blocks are pericentromerically located and DAPI staining showed that this heterochromatin is AT rich.Fluorescence in situ hybridizations using rDNA and the telomeric TTAGG sequence as probes have been carried out. FISH using rDNA showed that the nucleolar organizing region is located on the short arm of the X chromosome. FISH with the telomeric sequence revealed that in this species telomeres of chromosomes are composed of the pentanucleotide TTAGG repeats. This is the first study on the telomeric sequences in   Coccinellidae  .

Molecular cytogenetic studies in the ladybird beetle Henosepilachna argus Geoffroy, 1762 ( Coleoptera , Coccinellidae , Epilachninae )