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Karyometrical analysis of Microsomacanthus spasskii and M. spiralibursata

Published online by Cambridge University Press:  05 June 2009

R. Petkevičiūtė
Affiliation:
Institute of Ecology, Akademijos st. 2, Vilnius 2600, Lithuania
K.V. Regel
Affiliation:
lnstitute of the Biological Problems of the North, Russian Academy of Sciences, K. Marx st. 24, Magadan 685010, Russia

Abstract

Analysis of Giemsa-stained mitotic metaphase plates of Microsomacanthus spasskii and M. spiralibursata (Cestoda: Hymenolepididae) revealed the diploid chromosome numbers for both species to be 2n=6. The karyotypes are remarkably similar in general morphology; they both consist of three pairs of metacentric or meta-submetacentric chromosomes graded in size from 4.3 to 7.0 μm. Slight interspecific differences exist in the position of the centromere of chromosomes of the pair 3. Based on existing chromosome data the possible pathways of the karyotypic evolution within the family Hymenolepididae are discussed.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 1994

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