''Cystoseira'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

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 ...

e in the order

Fucales The Fucales (fucoids) are an order in the brown algae (class Phaeophyceae). The list of families in the Fucales, as well as additional taxonomic information on algae, is publicly accessible at Algaebaseref name="Guiry and Guiry">Guiry, M.D. and ...

Description

''Cystoseira'' is characterized by highly differentiated

basal Basal or basilar is a term meaning ''base'', ''bottom'', or ''minimum''. Science * Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure * Basal (medicine), a minimal level that is nec ...

and apical regions and the presence of catenate

pneumatocyst In phycology, a pneumatocyst is a floating structure that contains gas found on brown seaweed. A seaweed's thallus may have more than one. They provide buoyancy to lift the blades toward the surface, allowing them to receive more sunlight for ph ...

s (air-vesicles). In ''Cystoseira'' old plants have an elongated main axis, and in time the primary laterals become proportionally elongated. Their lower parts are strongly flattened into ‘foliar expansions’ or basal leaves. Fertile regions which bear

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 are known as receptacles. These are normally found at the tips of the branches. Their basal and apical regions are highly differentiated. They have catenate pnuematocysts (air vesicles). The aerocyst or air vesicles keep the organism erect, by causing it to float in strong currents.

Distribution

''Cystoseira'' is one of the most widely distributed genera of the Fucales order and provides an essential habitat for many epiphytes, invertebrates, and fish. ''Cystoseira'' is found mostly in temperate regions of the Northern Hemisphere, such as the Mediterranean, Indian, and Pacific Oceans.

Bioindicators

''Cystoseira'' depend on good water quality, and can be used for bioindication. This was discovered in a study of ''Cystoseira'' species undertaken on

Menorca Menorca or Minorca (from la, Insula Minor, , smaller island, later ''Minorica'') is one of the Balearic Islands located in the Mediterranean Sea belonging to Spain. Its name derives from its size, contrasting it with nearby Majorca. Its capi ...

Species

The following

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

are listed in the World Register of Marine Species: *''

Cystoseira abies-marina ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' (S.G.Gmelin) C.Agardh, 1820 *'' Cystoseira algeriensis'' Feldmann, 1945 *''

Cystoseira amentacea ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' (C.Agardh) Bory de Saint-Vincent, 1832 *''

Cystoseira baccata ''Cystoseira baccata'' is a species of brown seaweed in the family Fucaceae. It is found in the north east Atlantic, the Baltic Sea and the Mediterranean Sea. The species name ''baccata'' means "berry-like" and refers to the small air bladders. ...

'' (S.G.Gmelin) P.C.Silva, 1952 *''

Cystoseira barbata ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plants ...

'' (Stackhouse) C.Agardh, 1820 *'' Cystoseira barbatula'' Kützing *'' Cystoseira brachycarpa'' J.Agardh, 1896 *''

Cystoseira compressa ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plants ...

'' (Esper) Gerloff & Nizamuddin, 1975 *''

Cystoseira corniculata ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plants ...

'' (Turner) Zanardini, 1841 *'' Cystoseira crassipes'' (Mertens ex Turner) C.Agardh, 1821 *''

Cystoseira crinita ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' Duby, 1830 *''

Cystoseira crinitophylla ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' Ercegovic, 1952 *''

Cystoseira dubia ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' Valiante *'' Cystoseira elegans'' Sauvageau, 1912 *''

Cystoseira fimbriata ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' Bory de Saint-Vincent, 1832 *'' Cystoseira foeniculacea'' (Linnaeus) Greville, 1830 *''

Cystoseira funkii ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' Schiffner ex Gerloff & Nizamuddin, 1976 *''

Cystoseira geminata ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' C.Agardh, 1824 *''

Cystoseira hakodatensis ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' (Yendo) Fensholt, 1952 *''

Cystoseira helvetica ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old pla ...

'' Heer, 1877 *''

Cystoseira humilis ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plants ...

'' Schousboe ex Kützing, 1860 *''

Cystoseira hyblaea ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' G.Giaccone, 1985 *''

Cystoseira indica ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plan ...

'' (Thivy & Doshi) Mairh, 1968 *'' Cystoseira jabukae'' Ercegovic, 1952 *''

Cystoseira mauritanica ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plan ...

'' Sauvageau, 1911 *''

Cystoseira mediterranea ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plan ...

'' Sauvageau, 1912 *'' Cystoseira montagnei'' J.Agardh, 1842 *'' Cystoseira neglecta'' Setchell & N.L.Gardner, 1917 *''

Cystoseira nodicaulis ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plan ...

'' (Withering) M.Roberts, 1967 *''

Cystoseira osmundacea ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' (Turner) C.Agardh, 1820 *''

Cystoseira pelagosae ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Ercegovic, 1952 *''

Cystoseira planiramea ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Schiffner *''

Cystoseira platyclada ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Sauvageau, 1912 *''

Cystoseira rayssiae ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' E.Ramon, 2000 *''

Cystoseira sauvageauana ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' G.Hamel, 1939 *'' Cystoseira sauvageaueana'' G.Hamel, 1939 *''

Cystoseira schiffneri ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' G.Hamel, 1939 *'' Cystoseira sedoides'' (Desfontaines) C.Agardh, 1820 *''

Cystoseira selaginioides ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' *''

Cystoseira setchellii ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' N.L.Gardner, 1913 *''

Cystoseira sonderi ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plan ...

'' (Kützing) Piccone *''

Cystoseira spinosa ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Sauvageau, 1912 *'' Cystoseira squarrosa'' De Notaris, 1841 *'' Cystoseira stricta'' *''

Cystoseira susanensis ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Nizamuddin, 1985 *'' Cystoseira tamariscifolia'' (Hudson) Papenfuss, 1950 *''

Cystoseira trinodis ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' (Forsskål) C.Agardh, 1820 *''

Cystoseira usneoides ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' (Linnaeus) M.Roberts, 1968 *''

Cystoseira wildpretii ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Nizamuddin, 1995 *''

Cystoseira wildprettii ''Cystoseira'' is a genus of brown algae in the order Fucales. Description ''Cystoseira'' is characterized by highly differentiated basal and apical regions and the presence of catenate pneumatocysts (air-vesicles). In ''Cystoseira'' old plant ...

'' Nizamuddin *'' Cystoseira zosteroides'' C.Agardh, 1820

References

* * {{Taxonbar, from=Q2586432 Fucales Fucales genera Taxa named by Jacob Georg Agardh