Volvulina
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Volvulina is a genus of colonial green algae in the family Volvocaceae. It is cosmopolitan, but rare.
Volvulina steinii
Pandorina
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Pandorina is a genus of green algae in the family Volvocaceae. It is a common freshwater genus, and has a cosmopolitan distribution. Along with other algae such as Volvox, Eudorina and Chlamydomonas,
Volvulina
…form of V. steinii, and Volvulina boldii which is a nomen nudum. Molecular phylogenetic studies show that Volvulina is paraphyletic with respect to Pandorina: Volvulina - Description with pictures…
Pandorina