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Name derivation:

"Fire lens" or "Fire seed" -- Fire Pyro- lens phacus


Pyrophacus Stein 1883; 4 of 5 species descriptions are currently described taxonomically (Guiry and Guiry 2013)

Order Gonyaulacales; Family Pyrophacaceae


Photosynthetic biflagellate unicells, lenticular in shape, from 20 1190 m with cellulosic plates in cell wall. More extensive description is online (Guiry and Guiry 2013).

Similar genera:



Marine plankton.


Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 8 November 2013.

Stein, F. 1883. Die naturgeschichte der arthrodelen Flagellaten. In: Der Organismus der Infusionstiere. III. Pt. 2. ( Eds), pp. 1-30. Leipzig.