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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 2356

J. Green; Freshwater ecology in the Mato Grosso, Central Brazil, IV: Associations of testate Rhizopoda. J.Natural History 9:545-560, 1975

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Samples from five meander lakes in the valley of the Rio Suia Missu and from the Rio das Mortes at Xavantina, contained a total of 43 species of testate rhizopods, including a new genus with a complex multiporate mouth. Only one of the species is restricted to S.America in its known distribution. Analysis of the associations in the samples revealed that they were inadequate for inter-lake comparisons, and that the samples were repesentative of more restricted habitats. A comparison of the total list of species with the known fauna a of the River Sokoto in Nigeria gave a higher index of similarity than any of the inter-lake comparisons in the Suia Missu. This is taken as an indication of the existence of an association that might be widespread in tropical riverine meander-lake systems.