Observations on the life-history and ultrastructure of the marine choanoflagellateChoanoeca perplexaEllis

Author:

Leadbeater Barry S. C.

Abstract

In recent years the external morphology of marine choanoflagellates has been the subject of close scrutiny. This is a result of the attention given to marine nanoplankton, of which choanoflagellates are a part, and the relative ease with which choanoflagellates with loricae of costal construction can be observed in shadowcast whole mounts with an electron microscope. However, detailed ultrastructural studies of choanoflagellate protoplasts have been limited to one freshwater speciesCodosiga botrytis(Ehr.) Saville-Kent (Petersen & Hansen, 1954; Fjerdingstad, 1961; Hibberd, 1975) and four marine speciesSalpingoeca pelagicaLaval (Laval, 1971),Stephanoeca diplocostataEllis (Leadbeater & Manton, 1974),Savillea micropora(Norris) Leadbeater (Leadbeater, 1974) andCodosiga gracilisJames-Clark (Leadbeater & Morton, 1974b). Of these only the recent studies by Hibberd (1975), Laval (1971), Leadbeater & Manton (1974), Leadbeater (1974) and Leadbeater & Morton (1974b) contain micrographs of material processed by modern methods.

Publisher

Cambridge University Press (CUP)

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