Abstract
The chromosome complement and the C-banded karyotypes of specimens of Geoplana marginata auct. and of Issoca rezendei (Schirch) were investigated. The diploid and fundamental numbers of the two species were identical (2n = 14; FN = 28). Their karyotypes were similar except for the morphology of chromosome pair 6. Their C-banding patterns differed in quantity and localization of the constitutive heterochromatin. The similarity in karyotypes of these species support the hypothesis, proposed earlier on morphological grounds, that the genera Geoplana Stimpson and Issoca Froehlich are closely related. G. marginata and I. rezendei are the first land planarian species of the Neotropical Region to have their karyotypes described.
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© 1991 Kluwer Academic Publishers
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Cardoso de Almeida, E.J., Yamada, C.M., Froehlich, E.M. (1991). Cytogenetic studies of two land-planarian species from Brazil: Geoplana marginata and Issoca rezendei (Tricladida, Terricola). In: Tyler, S. (eds) Turbellarian Biology. Developments in Hydrobiology 69, vol 69. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2775-2_25
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DOI: https://doi.org/10.1007/978-94-011-2775-2_25
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