A = Vegative cells with loose theca and with food vacuoles; B = Division cyst; C = APC; D = 1''-plate with pore. All (DIC)
Life-form: Solitary
Size: Diameter=35-45 µm, division cyst =22-56(70?) µm.
Resting spore: +
Note: It has been shown to be a facultative mixotroph and able to engulf Ceratium spp (Skovgaard 1996a,b). F. subglobosum was common in Gullmarsfjorden during summer.
Distinctive features: 1''-plate
Similar species: Fragilidium mexicanum
Distribution:
Literature:
Skovgaard, A. 1996a. Engulfment ofCeratium spp. (Dinophyceae)
by the thecate photosynthetic dinoflagellate Fragilidium
subglobosum. Phycologia. 35: 490-499.
Skovgaard, A. 1996b. Mixotrophy in Fragilidium subglobosum (Dinophyceae): growth and grazing responses as functions of light intensity. Mar Ecol Prog Ser. 143: 247-253.
von Stosch, H. 1969. Dinoflagellaten aus der Nordsee II. Helgolandinium subglobosum gen. et spec. nov. Helgoländer Wiss. Meeresunters. 19: 569-577.