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Calothrix (Cyanophyceae)

Calothrix sp.
Terminal heterocyst and tapering trichome are clear.

Calothrix sp.
Modified from an image (0029L) at the National Institute of Environmental Science, Japan

Calothrix sp.
Modified from an image (0029L) at the National Institute of Environmental Science, Japan

Calothrix sp.
Modified from an image (0029L) at the National Institute of Environmental Science, Japan

Calothrix sp.
Modified from image posted online

Calothrix spp. forming the 'black zone' (a.k.a. 'spray zone', 'supratidal zone', 'supralittoral zone') just above the top of the intertidal zone along the rocky coast of Rhode Island.
Photograph from Field Guide to Rocky Shore of Rhode Island by Emily Carrington, Eric Zabel, & Arthur D'Arezzo posted online.

Calothrix sp.
Modified from sketch by Broady (1979) from the collection of Manfred Bölter, University of Kiel, DE

Broady, P.A. 1979 A preliminary survey of the terrestrial algae of the Antarctic Peninsula and South Georgia. Br Antarct Surv Bull 48: 47-70.

Calothrix gypsophila Bornet and Flahault 1886
Modified from sketch by Seaburg et al (1979) from the collection of Manfred Bölter, University of Kiel, DE

Seaburg, K.G., B.C. Parker, G.W. Prescott & L.A. Whitford 1979 The algae of Southern Victoria land, Antarctica. Bibl Lichenol, Vol 46, J Cramer, Vaduz

Calothrix D83
Modified from sketch by Broady (1979) from the collection of Manfred Bölter, University of Kiel, DE

Broady, P.A. 1979 The terrestrial algae of Signy Island, South Orkney Islands. British Antarctic Survey Report 98: 1-117

Calothrix sp.

Modified from sketch by Nienow and Friedmann (1993) from the collection of Manfred Bölter, University of Kiel, DE

Nienow J.A. & E.I. Friedmann E.I. 1993. Terrestrial lithophytic (rock) communities. In: Friedmann, E.I. (ed) Antarctic Microbiology, Wiley-Liss, New York, pp 343-412

Calothrix orsiniana (Kuetz. 1847) Thuret 1875
Modified from sketch by Pankow et al. (1991) from the collection of Manfred Bölter, University of Kiel, DE

Pankow, H., D. Haendel & W. Richter 1991. Die Algenflora der Schirmacheroase (Ostantarktika). Nova Hedwigia, Beih 103, J Cramer, Berlin

Calothrix sp.
Modified from sketch by Pankow et al. (1991) from the collection of Manfred Bölter, University of Kiel, DE

Broady, P.A. 1981. Ecological and taxonomic observations on subaerial epilithic algae from Princess Elizabeth Island and MacRobertson Island, Antarctica. British Phycological Journal 16: 257-266

Calothrix parietina (Kuetz) Thur.
Modified from sketch by Zaneveld (1988) from the collection of Manfred Bölter, University of Kiel, DE

Zaneveld, J.S. 1988. The cyanophyta of the Ross Sea Islands and coastal Victoria Land, Antarctica. Koeltz Scientific Books, Koenigstein.

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