A sample of Hypsibius oberhaeuseri without males was found near Trento.The karyologic examination found that this sample is a tetraploid biotype (4n = 24) reproducing with an ameiotic parthenogenesis. Some quantitative inquiries about the tetraploid biotype and the two others (diploid and triploid) indicate that the somatic size increases with the ploidy. The presence of three biotypes in H. oberhaeuseri demonstrates that some species of Tardigrada have a high level of complexity.
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Con il contributo del Ministero per i Beni e le Attività Culturali