- Zygnemataceae, family Zygnemataceae - pond scums: common freshwater algae forming green slimy masses
--1 is a kind of protoctist family
--1 is a member of
--1 has members: Zygnema, genus Zygnema; pond scum; genus SpirogyraZygnematales, order Zygnematales, Zygnemales, order Zygnemales