Click this link if you wish to consult the heterocystous morphotypes (the page will open in a new browser window).
Unicells, red; Acaryochloris, black; Prochloron & Prochlorococcus, violet; baeocyte-formers, magenta; Prochlorothrix, blue;
filamentous (non-heterocystous), pale blue; heterocystous, green; outgroups, gray.