Keratella sp. K. quadrata μm USA, 1999	Keratella sp. K. quadrata Karakemi marsh Yasaka Nagano, 2005	K. quadrata K. quadrata 160 x 120 μm Kumano park Higashi-Murayama Tokyo, 2007	Keratella sp. K. serrulata Onnenai Kushiro marsh Hokkaido, 2005
Keratella sp. K. cochlearis 85 x 50 μm Hasu-ike Shiga highland Nagano, 2005	Keratella sp. K. cochlearis μm Uruguay, 1999