A = Non-motile cells in immature pre-rosette stage and rosette stage, arrow=Pterosperma nationalis, arrowhead=Halosphaera sp. B-D = Stellate punctation and fine punctations on outer wall. A&B=(DIC), C&D=(PC)
Life-form: Phycoma stage and solitary flagellate
Size: Phycoma-stage: f. parkeae diameter=400-550 µm, f. minuta diameter=200-250 µm
Resting spore:
Note: It can give the surface water a green oily appearance
Distinctive features: The two different punctures of the outer wall
Similar species: H. russellii
Distribution:
Literature:
Boalch, G. T. & Mommaerts, J.P. 1969. A new punctate species of
Halosphaera. J. mar. biol. Ass. U.K. 49: 129-139.