Karyotypes and chromosome morphologies of Megalodiscus temperatus and Philophthalmus gralli
- 1 March 1981
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Helminthology
- Vol. 55 (1) , 71-78
- https://doi.org/10.1017/s0022149x00025499
Abstract
The karyotypes of two hermaphroditic trematodes, Megalodiscus temperatus and Philophthalmus gralli, were described and compared as to chromosomal morphology and constitutive heterochromatin constitution. The haploid number of chromosomes for both species is 10 and both karyotypes are composed mainly of acrocentric chromosomes. Constant heteromorphism of the No. 10 chromosomes was found in M. temperatus. The heteromorphic chromosomes differ is size and heterochromatin constitution. The possible mechanisms of chromosomal dimorphism in M. temperatus and its significance in the evolution of sexchromosome differentiation in trematodes are discussed.This publication has 16 references indexed in Scilit:
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