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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 4755

Gabriele Luftenegger, Wolfgang Petz, Helmut Berger, Wilhelm Foissner, and Hans Adam; Morphologic and Biometric Characterization of twenty-four Soil Testate Amoebae (Protozoa, Rhizopoda). Arch.Protistenk 136:153-189, 1988

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24 soil dwelling testate amoebae, belonging to 34 populations, are described and biometrically characterized. An "ideal individual" for each of the investigated species is constructed by means of the biometric data. Species separation in the Nebela tincta-parvula-bohemica-collaris group is discussed in detail. In Plagiopyxis declivis, idiosomes of euglyphids occur between the xenosomes of the shell. The analysis of the coefficients of variation of all species shows the lowest variation for the length of the shell and the highest values for its aperture. In general, the Testaceafilosa and shells composed of idiosomes have wider ranges of variation as compared with the Testacealobosa and species covered with xenosomes. This indicates that the Testaceafilosa evolve faster or are evolutionary younger than the Testacealobosa. Pseudodifflugia fascicularis, Euglypha strigosa and Difflugia lucida have only 1 central nucleolus, which contrasts with earlier data from literature. Significant differences between populations of the same species were found and indicate the existence of several geographical races which differ only in their size.