Abstract
A karyological analysis of eight species of Polyclads has been carried out.
A chromosome number of n = 10 for Stylochus alexandrinus and for Stylochus mediterraneus was ascertained on germinal lines.
A chromosome number of 2n = 20 was ascertained from metaphasic plates from regenerative blastemas of Notoplana alcinoi and Leptoplana tremellaris. A karyometric analysis of this last species permitted the reconstruction of an idiogram.
An idiogram was also prepared from metaphasic plates of Stylostomum ellipse obtained from early embryonic mitoses. The chromosome number of this species also was 2n = 20.
Chromosome numbers of n = 8 and 2n = 16 were ascertained on germinal lines and metaphasic plates of blastemas in Echinoplana celerrima and on germinal lines and early embryonic mitoses of Stylochoplana maculata.
Finally the diploid number 2n = 18 was ascertained on metaphasic plates from regenerative blastema of Yungia aurantiaca.
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Galleni, L., Puccinelli, I. (1981). Karyological observations on Polyclads. In: Schockaert, E.R., Ball, I.R. (eds) The Biology of the Turbellaria. Developments in Hydrobiology, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8668-8_7
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DOI: https://doi.org/10.1007/978-94-009-8668-8_7
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