Twelve taxa of Synuraceae; seven species of
Mallomonas, one species and one variety of
Synura, one species and one unidentified species of
Paraphysomonas, and one species of
Spinifermonas were found about 200 meters off Yamada Harbor in the southern basin of Lake Biwa in January, 1980. Eleven taxa excluding
Mallomonas fastigata were newly found in Lake Biwa.
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