Arnoldiella is a genus of green algae in the family Pithophoraceae.
Boodlea is a genus of green algae in the family Boodleaceae.
Dangemannia is a genus of green algae in the family Oltmannsiellopsidaceae.
Derbesia is a genus of green algae in the family Derbesiaceae. The plant was originally known from different names applied to its larger sporophyte, Derbesia, and its less conspicuous gametophyte, Halicystis. Derbesia was successfully cultured in the laboratories of German phycologist Peter Kornmann to learn that both it and the plant Halicystis were different parts of the life cycle of the same organism.
Draparnaldia is a genus of freshwater green algae in the family Chaetophoraceae. Draparnaldia are uniseriate; each filament is composed of a chain of cells arranged in one row. Chloroplasts appear as a band within the center of each cell. The length of the main axis cells are generally the same, regardless of whether or not they bear branches. These side branches are divided extensively into terminal hairs. The entire plant is enveloped in loose, slippery mucilage. Draparnaldia is a cosmopolitan genus with wide distribution and it is usually found in cold aerated waters. They are either attached to sand or grow epiphytically on other aquatic plants. Draparnaldia can be seen growing in clear streams trailing on stones and boulders. Herman S. Forest of The Southern Appalachian Botanical Club has stated that while not common, it is present frequently enough to be recorded in almost all local flora lists of green algae that have been compiled. A multitude of species are present in Lake Baikal, Siberia and have been described by Meyer and Jasnitzky. A species of the genus had been placed and described in the Linnean Herbarium as Conferva Mutabilis Roth in 1797. Nowadays Conferva is no longer used and the species is described as Draparnaldia mutabilis (Roth) Bory. Bory is added in honour of the researcher of the same name, based on whose description the genus was separated from similar appearing forms. Bory is accredited with the establishment of the genus.
Floydiella is a genus of green algae in the family Chaetopeltidaceae.
Friedmannia is a genus of green algae in the family Trebouxiaceae.
Fritschiella is a genus of green algae in the family Fritschiellaceae. There are two species F. tuberosa and a new freshwater species from China, F. aquatilis
Gomontia is a genus of green algae, in the family Gomontiaceae.
Hazenia is a genus of green algae in the family Gayraliaceae.
Pabia is a genus of green algae in the order Trebouxiales. As of February 2022, AlgaeBase accepted only one species, Pabia signiensis.
Groenbladia is a genus of green algae, specifically of the Desmidiaceae.
Heimansia is a genus of green algae, specifically of the Desmidiaceae.
Geppella is a genus of green algae in the family Codiaceae.
Draparnaldiopsis is a genus of green algae in the family Chaetophoraceae.
Ecklonia is a genus of kelp belonging to the family Lessoniaceae.
Cutleria is a genus of brown algae, one of 2–6 genera in the order Cutleriales. AlgaeBase recognises 11 species in the genus.
Braarudosphaera bigelowii is a coastal coccolithophore in the fossil record going back 100 million years. The family Braarudosphaeraceae are single-celled coastal phytoplanktonic algae with calcareous scales with five-fold symmetry, called pentaliths. With 12 sides, it has a regular dodecahedral structure, approximately 10 micrometers across.
Crouania is a genus of red algae (Rhodophyta) in the Callithamniaceae family. The name of the genus honours the French born Crouan brothers, Pierre-Louis Crouan and Hippolyte-Marie Crouan. It was first described by Jacob Georg Agardh in 1842, and the type species is Crouania attenuata.
Dudresnaya is a genus of red algae.
