Of the genus Oedogonium there are over 330 species, about 70 species of Bulbochaete, and 10 species of Oedocladium. More than half of these species are known to North America. Many of the species are used by aquarium owners.
There are more than 330 species within the genus Oedogonium, approximately 70 species of Bulbochaete, and 10 species of Oedocladium.  A majority of these species reside in North America. Many of them are utilized by aquarium owners.