Family: Colonies consisting of a fixed number of cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Colony of 4 cells attached to a gelatinous sheath at their posterior end, arranging cruciform; cell body ovoidal; two equal-length flagella emerging at their anterior end; a single chloroplast cup-shaped, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
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B. saccurifera ?
Gonium sociale?
cell 11 x 8 μm
Toneri Park
Tokyo, 2001
B. saccurifera ?
cell 11 x 8 μm
Iruma Park
Iruma
Saitama, 2006
Basichlamys sp. ?
col. 20 μm
cell 9 x 5.5 μm
Urawa
Saitama, 2001
Basichlamys sp. ?
cell 13 x 8 μm
Okubo Ryoke
Akigase park
Saitama, 2005
