Eukaryota  >  Viridiplantae  >  Streptophyta  >  Zygnematophyceae

Family	Genus	Species
Closteriaceae	2	73
Desmidiaceae	27	366
Gonatozygaceae	2	8
Mesotaeniaceae	5	56
Peniaceae	1	6
Serritaeniaceae	2	10
Spirogloeaceae	1	1
Spirogyraceae	2	332
Zygnemataceae	8	135