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 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 conceptacles 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 pneumatocysts (air vesicles). The aerocyst or air vesicles keep the organism erect, by causing it to float in strong currents.

Cystoseira

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.

Cystoseira

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.

Cystoseira

Species

The following species are listed in the World Register of Marine Species:

Cystoseira abies-marina (S.G.Gmelin) C.Agardh, 1820

Cystoseira algeriensis Feldmann, 1945

Cystoseira amentacea (C.Agardh) Bory de Saint-Vincent, 1832

Cystoseira baccata (S.G.Gmelin) P.C.Silva, 1952

Cystoseira barbata (Stackhouse) C.Agardh, 1820

Cystoseira barbatula Kützing

Cystoseira brachycarpa J.Agardh, 1896

Cystoseira compressa (Esper) Gerloff & Nizamuddin, 1975

Cystoseira corniculata (Turner) Zanardini, 1841

Cystoseira crassipes (Mertens ex Turner) C.Agardh, 1821

Cystoseira crinita Duby, 1830

Cystoseira crinitophylla Ercegovic, 1952

Cystoseira dubia Valiante

Cystoseira elegans Sauvageau, 1912

Cystoseira fimbriata Bory de Saint-Vincent, 1832

Cystoseira foeniculacea (Linnaeus) Greville, 1830

Cystoseira funkii Schiffner ex Gerloff & Nizamuddin, 1976

Cystoseira geminata C.Agardh, 1824

Cystoseira hakodatensis (Yendo) Fensholt, 1952

Cystoseira helvetica Heer, 1877

Cystoseira humilis Schousboe ex Kützing, 1860

Cystoseira hyblaea G.Giaccone, 1985

Cystoseira indica (Thivy & Doshi) Mairh, 1968

Cystoseira jabukae Ercegovic, 1952

Cystoseira mauritanica Sauvageau, 1911

Cystoseira mediterranea Sauvageau, 1912

Cystoseira montagnei J.Agardh, 1842

Cystoseira neglecta Setchell & N.L.Gardner, 1917

Cystoseira nodicaulis (Withering) M.Roberts, 1967

Cystoseira osmundacea (Turner) C.Agardh, 1820

Cystoseira pelagosae Ercegovic, 1952

Cystoseira planiramea Schiffner

Cystoseira platyclada Sauvageau, 1912

Cystoseira rayssiae E.Ramon, 2000

Cystoseira sauvageauana G.Hamel, 1939

Cystoseira sauvageaueana G.Hamel, 1939

Cystoseira schiffneri G.Hamel, 1939

Cystoseira sedoides (Desfontaines) C.Agardh, 1820

Cystoseira selaginioides

Cystoseira setchellii N.L.Gardner, 1913

Cystoseira sonderi (Kützing) Piccone

Cystoseira spinosa Sauvageau, 1912

Cystoseira squarrosa De Notaris, 1841

Cystoseira stricta

Cystoseira susanensis Nizamuddin, 1985

Cystoseira tamariscifolia (Hudson) Papenfuss, 1950

Cystoseira trinodis (Forsskål) C.Agardh, 1820

Cystoseira usneoides (Linnaeus) M.Roberts, 1968

Cystoseira wildpretii Nizamuddin, 1995

Cystoseira wildprettii Nizamuddin

Cystoseira zosteroides C.Agardh, 1820

References

Fucales

Fucales genera

Taxa named by Jacob Georg Agardh