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Name derivation:

 

Classification:

Helicotheca M. Ricard,  1987;  the single species description is currently accepted taxonomically (Guiry and Guiry 2016).

Synonym:  Streptotheca Shrubsole 1890 considered to be an ‘illegal name’.

Order Biddulphiophycidae or Biddulphiophycidae, Family Streptothecaceae

Morphology:

Unicells or ribbon-like filaments, often twisted.

Similar genera:

 

Habitat:

Marine plankton.

 

References:

Guiry, M.D. and G.M. Guiry  2017.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.  http://www.algaebase.org; searched on 10 September 2013.

Ricard, M.  1987.  Atlas du Phytoplankton Marin. Vol. 2. Diatomophycées. pp. 1-297. Paris: Éditions du Centre National de la Recherche Scientifique.