Stoermer, E.F., Håkansson, H. & Theriot, E.C. (1987). Cyclostephanos species newly reported from North America: C. tholiformis sp. nov. and C. costatilimbus comb. nov. British Phycological Journal. 22(4): 349-358.
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Stoermer, E.F., Håkansson, H. & Theriot, E.C.
1987
Cyclostephanos species newly reported from North America: C. tholiformis sp. nov. and C. costatilimbus comb. nov.