, Volume 62, Issue 3, pp 187–191 | Cite as

Chromosomal polymorphism in planarians (Turbellaria, Tricladida) and the plate tectonics of the western Mediterranean

  • E. J. De Vries
  • J. Baguñà
  • I. R. Ball


In two populations of Dugesia (Schmidtea) mediterranea the third chromosome pair consists of two heteromorphous elements. This chromosomal polymorphism, which is common in other animal groups, was hitherto unknown in planarians.

The evolutionary and biogeographical significance of this chromosomal polymorphism is discussed, for the geographical distribution of the two aberrant populations may have relevance for the theories of microplate dispersal involving the western Mediterrancan.


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  1. Alvarez, W., 1976. A former continuation of the Alps. Bull. geol. Soc. Am. 87: 891–896.Google Scholar
  2. Alvarez, W. Cocozza, T. & Wezel, F. C., 1974. Fragmentation of the Alpine orogenic belt by microplate dispersal. Nature 248: 309–314.Google Scholar
  3. Ball, I. R., 1969. Dugesia lugubris (Trisladida, Paludicola), a European immigrant into North American freshwaters. J. Fish. Res. Bd Can. 26(2): 221–228.Google Scholar
  4. Ball, I. R., 1974. A contribution to the phylogeny and biogeography of the freshwater triclads (Platyhelminthes; Turbellaria). In N. W. Riser and M. P. Morse (eds.), The biology of the Turbellaria. McGraw-Hill Book Company, New York, pp. 339–401.Google Scholar
  5. Ball, I. R. & Gourhault, N., 1975. The morphology, karyology and taxonomy of a new freshwater planarian of the genus Phagocata from California (Platyhelminthes; Turbellaria), Life Sci. Contr. R. Ont. Mus. 105: 1–19.Google Scholar
  6. Ball, I. R., Gourbault, N. & Kenk, R., 1981. The planarians (Turbellaria)_of temporary waters in castern North America. Life Sci. Contr. R. Ont. Mus. 127: 1–27.Google Scholar
  7. Benazzi, M., 1963. Geneties of reproductive mechanisms and chromosome behavior in some freshwater triclads. In: E. C. Dougherty (ed.). The lower Metazoa. Univ. of California Press, Berkeley and Los Angeles, pp. 405–422.Google Scholar
  8. Benazzi, M., 1974. Fissioning in planarians from a genetic standpoint. In: N. W. Riser and M. P. Morse (eds.), The biology of the Turbellaria. McGraw-Hill, New York. pp. 476–492.Google Scholar
  9. Benazzi, M. & Benazzi-Lentati, G., 1976. Animal Cytogeneties, vol. 1. Platyhelminthes. Gebr. Borntraeger. Berlin and Stuttgart, 182 pp.Google Scholar
  10. Benazzi, M., Ballester, R., Baguña, J. & Pucinelli, I., 1972. The fissiparous race of the planarian Dugesia lugubris s.l. found in Barcelona belongs to the biotype G. Caryologia 25: 59–68.Google Scholar
  11. Benazzi, M., Baguñà, J., Ballester, R. Pucinelli, I. & Del Papa, R., 1975. Further contributions to the taxonomy of the ‘Dugesia lugubris-polychroa group’ with deseription of Dugesia mediterranea n. sp. (Trieladida, Paludicola). Boll. Zool. 42: 81–89.Google Scholar
  12. Biju-Duval, B., Dercourt, J. & Le Pichon, X., 1976. In: B. Biju-Duval and L. Montadert (eds.). Structural history of the mediterranean basins, pp. 143–164 (Ed. Technip Paris 1976).Google Scholar
  13. Cardona, M. A. & Contandriopoulos, J., 1979. In: D. Brambwell (ed.), Plants and islands. Academic Press, pp. 133–169.Google Scholar
  14. Gourbault, N., 1969. Expansion de Dugesia tigrina (Girard), planaire américaine introduite en Europe. Annls Limnol. 5(1): 3–7.Google Scholar
  15. Levan, A., Fregda, K. & Sandberg, A. A., 1964. Nomenclature for centromeric position on chromosomes. Hereditas 52: 201–220.Google Scholar
  16. Reynoldson, T. B., Smith, B. D. & Maitland, P. S., 1981. A species of North American triclad new to Britain found in Loch Ness, Scotland. J. Zool. (Lond.) 193: 531–538.Google Scholar
  17. Sluys, R. & De Jong. H. Chromosome morphological studies of Dugesia gonocephala s.l. (Platyhelminthes. Trieladida). Caryologia (in press).Google Scholar
  18. Van den Berg, J., 1979. Reconstructions of the western mediterranean area for the mesozoic and tertiary timespan. Geologic Mijnb. 58(2): 153–160.Google Scholar

Copyright information

© Dr W. Junk Publishers 1984

Authors and Affiliations

  • E. J. De Vries
    • 1
  • J. Baguñà
    • 2
  • I. R. Ball
    • 1
  1. 1.Institute of Taxonomic ZoologyUniversity of AmsterdamAmsterdamThe Netherlands
  2. 2.Dept. de Genética, Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain

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