Genus: Cell body ellipsoidal-ovoidal with cell wall; Four equal-length flagella arising from an anterior depression of the cell body; chloroplast cup-shaped with a pyrenoid at the bottom; a single stigma large; two contractile vacuoles at the base of flagella (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

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T. cordiformis ? 15 x 11 μm Hana-no-oka Koen Saitama, 2002	T. cordiformis ? 14 x 8 μm Wan-park-land Kochi, 2002	T. cordiformis ? μm Maihara Shiga, 2003	T. cordiformis ? μm Flower park Ashikaga Tochigi, 2003
T. cordiformis μm Old Sugata r. Mibu Tochigi, 2008	T. cordiformis ? 17 x 14 μm Tachikawa Tokyo, 2004	T. cordiformis ? 17 x 14 μm Shiroyama Park Okegawa Saitama, 2006	T. cordiformis ? 14 x 12.5 μm Nakai-numa park Yoshikawa Saitama, 2006
T. cordiformis ? 14 x 12.5 μm Yase Shinsu koen Minakami Gunma, 2006	T. cordiformis μm Akebono-yama p. Kashiwa Chiba, 2008

Similar genus -->> Carteria;

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