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.
The genus Oedogonium comprises a large number of species (over 330), with many being found in North America, and some being used by aquarium owners.