Cytological studies on three hymenolepidid species

Abstract

AbstractThe karyotypes ofVampirolepis nana, Hymenolepis diminutaandVampirolepis erinacei(Cestoda: Cyclophyllidea) have been described. The number of chromosomes in the diploid cell of the studied taxa was 2n = 12. The absolute and the relative lengths of the chromosomes ofV. nanaandH. diminutawere measured. The chromosomes had similar metric values. In the karyotypes ofV. nanaandH. diminutathere were ten one-arm chromosomes and.one two-arm chromosome (the third in length in the karyotype ofV. nanaand the first in length in the karyotype ofH. diminuta). The chromosomes in the karyotype ofV. erinaceihad one arm which was proved by the terminal localization of the constitutive heterochromatin. The examined species differed in the morphology of some chromosomes in the karyotypes.