Rivularia (cyanobacteria) explained

Rivularia is a genus of cyanobacteria of the family Rivulariaceae.^[1]

Description

Rivularia is found growing on submerged stones, moist rocks, and damp soils near the riverside. It is found in colonies, and the trichomes are radially arranged within a colony, with each trichome wholly or partially surrounded by a gelatinous sheet. The trichomes have a basal heterocyst. Each trichome has a narrow aptic portion which is whip- or tail-like consisting of a row of small cells. Akinetes are absent in Rivularia. The species multiply with the aid of hormogonia 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 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

References

• Web site: Rivularia . Algaebase . 23 September 2014.

Further reading

• Rastogia. R.P. Singh. S.P. Incharoensakdic. A. Häder. D.-P. Sinhaa. R.P. Ultraviolet radiation-induced generation of reactive oxygen species, DNA damage and induction of UV-absorbing compounds in the cyanobacterium Rivularia sp. HKAR-4. South African Journal of Botany. January 2014. 90. 163–169. 10.1016/j.sajb.2013.11.006. free.
• Berrendero. Esther. Perona. Elvira. Mateo. Pilar. Genetic and morphological characterization of Rivularia and Calothrix (Nostocales, Cyanobacteria) from running water. International Journal of Systematic and Evolutionary Microbiology. Feb 2008. 58. Part 2. 447–460. 10.1099/ijs.0.65273-0. 18218948. free.
• Marco. Sergio. Aboal. Marina. Chaves. Elena. Mulero. Iván. García-Ayala. Alfonsa. Immunolocalisation of microcystin in colonies of the cynobacterium Rivularia in calcareous streams. Marine and Freshwater Research. 63. 2. 160. 2012. 10.1071/MF11168.
• Silva, C., P. Basson & R. Moe (1996). Catalogue of the Benthic Marine Algae of the Indian Ocean. Volume 79 of University of California Publications in Botany .

Notes and References

1. 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