''Arthrothamnus'' is a genus of

brown alga Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and ...

comprising approximately 2 species. It includes the algae commonly known as nekoashi-kombu, oarweed and chishima-nekoashi-kombu. ''Bifurcariopsis'' reproduces by means of

conceptacle Conceptacles are specialized cavities of marine and freshwater algae that contain the reproductive organs. They are situated in the receptacle and open by a small ostiole.Boney, A.D. (1969). ''A Biology of Marine Algae''. Hutchinson Educational Ltd ...

s; it produces tetraspores and dispores and

carpospore A carpospore is a diploid spore produced by red algae. After fertilization, the alga's carpogonium The carpogonium (plural ''carpogonia'') is the female organ in the Red Algae (Rhodophyta) which have a highly specialized type of reproduction. It c ...

Species

The two species currently recognised are '' Arthrothamnus bifidus'' and ''

Arthrothamnus kurilensis ''Arthrothamnus'' is a genus of brown alga comprising approximately 2 species. It includes the algae commonly known as nekoashi-kombu, oarweed and chishima-nekoashi-kombu. ''Bifurcariopsis'' reproduces by means of conceptacles; it produces tetr ...

''.

References

* Laminariaceae Laminariales genera {{phaeophyceae-stub