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13 keratella species
Keratella serrulata
Keratella cochlearis
Keratella mixta
Keratella quadrata
Keratella taurocephala
Keratella ticinensis
Keratella tecta
Keratella crassa
Keratella cruciformis
Keratella valga
Keratella hiemalis
Keratella irregularis
Keratella testudo
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