Cyanobacteriaassociatedwithtufa014 Rivularia

''Rivularia'' is a genus of cyanobacteria of the family Rivulariaceae.Guiry, Michael D. (2014). Rivularia C.Agardh ex Bornet & Flahault, 1886. In: Guiry, M.D. & Guiry, G.M. (2014). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=146623 on 2014-12-09

Description

''Rivularia'' is found growing on submerged stones, moist rocks, and damp soils near the riverside. It is found in colonies, and the

trichomes Trichomes (); ) are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a plant ...

are radially arranged within a colony, with each trichome wholly or partially surrounded by a gelatinous sheet. The trichomes have a basal

heterocyst Heterocysts or heterocytes are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as '' Nostoc punctiforme'', ''Cylindrospermum stagnale'', and ''Anabaena sphaerica''. They fix nitrogen fr ...

. Each trichome has a narrow aptic portion which is whip- or tail-like consisting of a row of small cells.

Akinete An akinete is an enveloped, thick-walled, non-motile, dormant cell formed by filamentous, heterocyst-forming cyanobacteria under the order Nostocales and Stigonematales. Akinetes are resistant to cold and desiccation. They also accumulate and sto ...

s are absent in ''Rivularia''. The species multiply with the aid of

hormogonia Hormogonia are motile filaments of cells formed by some cyanobacteria in the order Nostocales and Stigonematales. They are formed during vegetative reproduction in unicellular, filamentous cyanobacteria, and some may contain heterocysts and ...

and heterocyst.

Species

* '' Rivularia atra'' Roth ex Bornet & Flahault, 1886 * '' Rivularia bullata'' (Poir) Berkeley ex Bornet & Flahault, 1886 * '' Rivularia haematites'' (De Candolle) Bornet & Flahault, 1886 * '' Rivularia jaoi'' H.-J.Chu, 1952 * ''

Rivularia nitida ''Rivularia'' is the scientific name of two genera of organisms and may refer to: *Rivularia (cyanobacteria), ''Rivularia'' (cyanobacteria), a genus of cyanobacteria in the family Rivulariaceae *Rivularia (gastropod), ''Rivularia'' (gastropod), a ...

'' C.Agardh ex Bornet & Flahault, 1886 * '' Rivularia thermalis'' Y.-Y.Li, 1984 ;Species brought into synonymy: * ''Rivularia cornudamae'' Roth, 1797: synonym of '' Chaetophora lobata'' Schrank, 1783 * ''Rivularia elegans'' Roth, 1802: synonym of '' Chaetophora elegans'' (Roth) C.Agardh, 1812 * ''Rivularia endiviaefolia'' Roth, 1798: synonym of '' Chaetophora lobata'' Schrank, 1783 * ''Rivularia lloydii'' P.Crouan & H.Crouan, 1867: synonym of '' Brachytrichia lloydii'' (P.Crouan & H.Crouan) P.C.Silva, 1996 * ''Rivularia multifida'' Weber & Mohr, 1804: synonym of '' Nemalion multifidum'' (F.Weber & D.Mohr) Chauvin, 1842 * ''Rivularia plana'' Harvey, 1833: synonym of '' Isactis plana'' (Harvey) Thuret ex Bornet & Flahault, 1886 * ''Rivularia rubra'' (Hudson) Wahlenberg, 1826: synonym of '' Nemalion helminthoides'' (Velley) Batters, 1902 * ''Rivularia tuberiformis'' Smith, 1809: synonym of '' Leathesia marina'' ( Lyngbye) Decaisne, 1842 * ''Rivularia vermiculata'' Smith, 1808: synonym of '' Mesogloia vermiculata'' (Smith) S.F.Gray, 1821 * ''Rivularia zosterae'' Mohr, 1810: synonym of '' Eudesme virescens'' (Carmichael ex Berkeley) J.Agardh, 1882

Description

Species

References

Further reading