Rivularia 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 Berkeley ex Bornet & Flahault, 1886 Rivularia haematites Bornet & Flahault, 1886 Rivularia jaoi H.-J.Chu , 1952 Rivularia nitida C.Agardh ex Bornet & Flahault, 1886 Rivularia thermalis Y.-Y.Li, 1984 Rivularia cornudamae Roth, 1797: synonym of Chaetophora lobata Schrank, 1783 Rivularia elegans Roth, 1802: synonym of Chaetophora elegans 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.C.Silva , 1996 Rivularia multifida Weber & Mohr, 1804: synonym of Nemalion multifidum1842 Rivularia plana Harvey, 1833: synonym of Isactis plana Thuret ex Bornet & Flahault, 1886 Rivularia rubra Wahlenberg, 1826: synonym of Nemalion helminthoides Batters , 1902 Rivularia tuberiformis Smith, 1809: synonym of Leathesia marina Decaisne , 1842 Rivularia vermiculata Smith, 1808: synonym of Mesogloia vermiculata S.F.Gray , 1821 Rivularia zosterae Mohr, 1810: synonym of Eudesme virescens J.Agardh, 1882
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