Skip to main content

Three species of Halosphaera

  • M. Parke (a1) and I. Den Hartog-Adams (a2)

Two phases, cyst and motile, of three species of Halosphaera (Prasinophyceae), H. viridis Schrn., H. minor Ostenf. and H. russellii Parke, sp.nov., are described and the distinguishing characters tabulated. The stages in development of the two phases are detailed and a possible periodicity in their production is suggested. Only the motile phase can persist as an independent form reproducing asexually by fission. Sexuality is not recorded for the genus nor can the reported production of aplanospores be substantiated. The supposed ‘heterokont motile phase of Halosphaera’ of Pascher, who placed the genus in the Xanthophyceae, is believed to be a colourless phagotrophic flagellate parasitizing the cyst phase. All cyst phases, with plain or punctate walls, resembling those of Halosphaera in structure, do not necessarily belong to this genus. The study of living material is therefore essential.

Hide All
Braarud, T. & Nordli, E., 1963. Reproduction and size variation in Halosphaera viridis of northern waters. Nytt Mag. Bot., Vol. 10, pp. 131–6.
Bretschneider, L. H., 1925. Pyramimonas utrajectina spec.nov., eine neue Polyblepharididae. Arch. Protistenk., Bd. 53, pp. 124–30.
Chadefaud, M., 1947. Etudes sur l'organisation de deux Volvocales sédentaires marines Prasinocladus lubricus et Chlorodendron subsalum. Rev. Scient., Paris, Année 85, pp. 862–5.
Cleve, P. T., 1898. Om aplanosporer hos Halosphaera. Öfvers. VetenskAkad. Förh., Stockh., 1898, No. 1, pp. 133–4.
Dangeard, P., 1932. Notes sur l'Halosphaera viridis Schmitz. Botaniste, Ser. 24, pp. 261–74.
Gaarder, K. R., 1954. Coccolithineae, Silicoflagellatae, Pterospermataceae and other forms from the ‘Michael Sars’ North Atlantic Deep-Sea Expedition, 1910. Rep. Sars N. Atl. Deep Sea Exped., Vol. 2, No. 4, 20 pp.
Gough, L. H., 1907. Report on the plankton of the English Channel in 1904 and 1905. Rep. N. Sea Fish. Invest. Comm., Southern Area, 1904–1905, pp. 165268.
Gran, H. H., 1902. Das Plankton des Norwegischen Nordmeeres. Rep. Norweg. Fish Invest., Vol. 2, No. 5, pp. 1222.
Jørgensen, E., 1899. Protophyten und Protozoën im Plankton aus der Norwegischen Westküste. Bergens Mus. Årb., 1899, No. 6, pp. 1112.
Lemmermann, E., 1899. Ergebnisse einer Reise nach dem Pacific Planktonalgen. Abh. naturw. Ver. Bremen, Bd. 16, pp. 313–98.
Lohmann, H., 1903. Neue Untersuchungen über den Reichthum des Meeres an Plankton. Wiss. Meeresuntersuch., Bd. 7, pp. 186.
Manton, I., Oates, K. & Parke, M., 1963. Observations on the fine structure of the Pyramimonas stage of Halosphaera and preliminary observations on three species of Pyramimonas. J. mar. biol. Ass. U.K., Vol. 43, pp. 225–38.
Manton, I., Rayns, D. G., Ettl, H. & Parke, M. 1965. Further observations on green flagellates with scaly flagella: the genus Heteromastix Korshikov. J. mar. biol. Ass. U.K., Vol. 45, pp. 241–55.
Norris, R. E., 1961. Observations on phytoplankton organisms collected on the N.Z.O.I. Pacific Cruise, September 1958. N.Z. Jl. Sci., Vol. 4, pp. 162–88.
Ostenfeld, C. H., 1899. In M. Knudsen & C. H. Ostenfeld, Iagttagelser over Overfladevandets Temperatur, Saltholdighed og Plankton paa islandske og grønlandske Skibsrouter i 1898. Kjøbenhavn.
Ostenfeld, C. H., 1915. Om Algenslaegten Halosphaera&s systematiske Stilling. Bot. Tidsskr., Bd. 34, pp. 70–1.
Ostenfeld, C. H., 1928. Note on Halosphaera Schmitz. Dansk bot. Ark., Bd. 5, No. 8, pp. 18.
Parke, M. & Adams, I., 1961. The Pyramimonas-like motile stage of Halosphaera viridis Schmitz. Bull. Res. Coun. Israel, Vol. 10D, pp. 94100.
Parke, M. & Dixon, P. S., 1964. A revised check-list of British marine algae. J. mar. biol. Ass. U.K., Vol. 44, pp. 499542.
Parke, M. & Manton, I., 1965. Preliminary observations on the fine structure of Prasinocladus marinus J. mar. biol. Ass. U.K., Vol. 45, pp. 525–36.
Pascher, A., 1915. Über Halosphaera. Ber. dt. bot. Ges., Bd. 33, H. 9, pp. 488–92.
Schmitz, F., 1878. Halosphaera, eine neue Gattung gröner Algen aus dem Mittelmeer. Mitt. zool. Stn. Neapel, Bd. 1, pp. 6792.
Southward, A. J., 1962. The distribution of some plankton animals in the English Channel and approaches. II. Surveys with the Gulf III high-speed sampler, 1958–60. J. mar. biol. Ass. U.K., Vol. 42, pp. 275375.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Full text views

Total number of HTML views: 0
Total number of PDF views: 27 *
Loading metrics...

Abstract views

Total abstract views: 98 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 19th March 2018. This data will be updated every 24 hours.