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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 2598

M.G. George and C.H. Fernando; On the rotifer Keratella canadensis Berzins. Can.J.Zool. 47(1):155-156, 1969

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Keratella canadensis Berzins described from Canada is considered a form of Keratella quadrata Muller. Evidence for this comes from the appearance of this form in two lakes only once for 3 consecutive months during 2 years' regular sampling and the presence of typical "quadrata" characters. "Keratella canadensis" appears to have morphological features which place it at one extreme of the very variable Keratella quadrata.