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  • Journal of the Marine Biological Association of the United Kingdom, Volume 63, Issue 1
  • February 1983, pp. 135-160

Life-history and ultrastructure of a new marine species of Proterospongia (Choanoflagellida)

  • Barry S. C. Leadbeater (a1)
  • DOI:
  • Published online: 01 May 2009

The morphology and microanatomy of two different phases in the life history of a single new marine choanoflagellate (Proterospongia choanojuncta sp.nov.) have been documented and described with the aid of light microscopy and from electron microscopy of whole mounts and sections of material in clonal culture. Completion of the life-cycle has been repeatedly achieved in cultures established from single cells, regardless of which phase is used as a starting point. One phase is colonial and motile (the Proterospongia phase) and the other unicellular and sedentary (the Choanoeca phase). Taxonomic, nomenclatural and developmental problems are summarized and discussed.

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B. Brill 1973. Untersuchungen zur Ultrastruktur der Choanocyte von Ephydatia fluviatilis L. Zeitschrift fiir Zellforschung und mikroskopische Anatomie, 144, 231245.

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H. James-Clark 1868. On the Spongiae Ciliatae as Infusoria Flagellata; or observations on the structure, animality, and relationship of Leucosolenia botryoides, Bowerbank. Annals and Magazine of Natural History, 1, 133142; 188–215; 250–264.

J. B. Lackey 1959. Morphology and biology of a new species of Protospongia. Transactions of the American Microscopical Society, 78, 202206.

B. S. C. Leadbeater 1970. Preliminary observations on differences of scale morphology at various stages in the life cycle of ‘ Apistonema-Syracosphaera’ sensu von Stosch. British Phycological Journal, 5, 5769.

B. S. C. Leadbeater 1977. Observations on the life-history and ultrastructure of the marine choanoflagellate Choanoeca perplexa Ellis. Journal of the Marine Biological Association of the United Kingdom, 57, 285301.

B. S. C. Leadbeater 1979. Developmental and ultrastructural observations on two stalked marine choanoflagellates, Acanthoecopsis spiculifera Norris andAcanthoeca spectabilis Ellis. Proceedings of the Royal Society (B), 204, 5766.

B. S. C. Leadbeater & C. Morton 1974. A microscopical study of a marine species of Codosiga James-Clark (Choanoflagellata) with special reference to the ingestion of bacteria. Biological Journal of the Linnean Society of London, 6, 337347.

A. R. Loeblich III 1967. Notes on the divisions Chlorophyta, Chrysophyta, Pyrrophyta and Xanthophyta and the family Parastigaceae. Taxon, 16, 230236.

K. M. Lyons 1973. Evolutionary implications of collar cell ectoderm in a coral planula. Nature, London, 245, 5051.

A. Norrevang & K. G. Wingstrand 1970. On the occurrence and structure of choanocyte-like cells in some echinoderms. Acta zoologica, Stockholm, 51, 249270.

M. Parke & I. Adams 1960. The motile (Crystallolithus hyalinus Gaarder & Markali) and nonmotile phases in the life history ofCoccolithus pelagicus (Wallich) Schiller. Journal of the Marine Biological Association of the United Kingdom, 39, 263274.

J. W. Salter 1864. On some new fossils from lingula-flags of Wales. Quarterly Journal of the Geological Society of London, 20 233241.

H. A. Von Stosch 1955. Ein morphologischer Phasen wechsel bei einer Coccolithophoride. Naturwissenschaften, 42, 423.

J. Throndsen 1974. Planktonic choanoflagellates ftom North Atlertic waters. Sarsia, 56, 95122.

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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
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