Rivularia (cyanobacteria)
# Rivularia (cyanobacteria)

Rivularia is a genus of cyanobacteria of the family Rivulariaceae.

## 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
