On the karyology of trematodes of the genusMicrophallusand their intermediate gastropod host,Littorina saxatilisII. Karyological study ofLittorina saxatilis(Gastropoda: Prosobranchia)

摘要

The karyotypes ofLittorina saxatilisOlivi specimens from exposed areas of the Yarnyshnaya inlet littoral (the Kola Peninsular, USSR) consist of 34 chromosomes, i.e. 10 pairs of meta- and submetacentrics and 7 pairs of subtelo- and telocentrics. Two pairs of bi-armed homologues are much bigger than the others. On the whole these karyotypes are similar to those of the individuals from the Swedish and English populations.