Cyanobacteria Stanier, 1974

Wrona, Ryszard, 2004, Cambrian microfossils from glacial erratics of King George Island, Antarctica, Acta Palaeontologica Polonica 49 (1), pp. 13-56 : 20

Phylum Cyanobacteria Stanier, 1974

(Cyanophyta Sachs, 1874)

Mineralized cyanobacterial filaments

Remarks.—These highly variable mineralized filaments have often been given separate species names. However, wide stratigraphic range, diversity of habitats, and different manners of preservation led modern researchers to assume that many of these species are “diagenetic taxa” ( Pratt 1984, 2001). The most common practice have been to refer them to the genus Girvanella Nicholson and Etheridge, 1878 (type species: G. problematica Nicholson and Etheridge, 1878 ) only (e.g., Riding 1991; Pratt 2001). Its morphology and taxonomy was reviewed by Mamet and Roux (1975). For comparison with modern cyanophyte genera and taxonomy see Danielli (1981).