Family: With two unequal flagella; no pellicle and plastic; with or without a delicate test; solitary or colonial; free swimming or attached (Kudo, 1966).
Genus: Cells attached by a cytoplasmic thread to a stalked vase-like lorica; two contractile vacuoles (Kudo, 1966).

->> Description at WPPNO

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S. leptostoma cell body 8 μm Japan, 199?	S. leptostoma lorica 12 x 5 μm cell 8 x 4 μm Univ. A.V.M. Obihiro Hokkaido, 2005	S. epipyxis cell body μm Shirakawa Fukushima, 1999
S. gracilis ? cell body μm Shirakawa Fukushima, 1999	S. gracilis ? cell body μm Koshigaya Saitama, 2001

Similar genus --> > Bicoeca (Bicosoeca) (Mastigophora, Bicosoecida); Diploeca (Mastigophora, Choanoflagellida, Salpingoecidae)

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