Spongonema tomentosum (Hudson) K??tzing Hudson K??tzing Are you changing its name? Remember to add the former name to the synonym's field. Algas Group Phaeophyceae Class Ectocarpales Order Chordariaceae Family Spongonema Genus License Main image File Conservation Observations Bibliography Description and biology Number of chromosomes Phenology Distribution Habitat Population Risk factors Conservation actions Observations Thanks Bibliography Cancel Save changes