Eukaryota  >  Viridiplantae  >  Streptophyta  >  Zygnematophyceae

Family	Genus	Species
Closteriaceae	2	75
Desmidiaceae	26	370
Gonatozygaceae	2	8
Mesotaeniaceae	5	57
Peniaceae	1	7
Serritaeniaceae	2	10
Spirogloeaceae	1	1
Spirogyraceae	2	332
Zygnemataceae	8	136