Halosphaera parkeae Boalch et Mommaerts 1969

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)

f. minuta


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


Boalch, G. T. & Mommaerts, J.P. 1969. A new punctate species of Halosphaera. J. mar. biol. Ass. U.K. 49: 129-139.

  Copyright © 1996-2006, Mats Kuylenstierna & Bengt Karlson All rights reserved.
Last modified on 15 September, 2006

Swedish Meteorological and Hydrological Institute


Department of Marine Ecology, Göteborg University, Sweden