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- Title
THE "HYSTRICHOSPHAERID RESTING SPORE OF THE DINOFLAGELLATE PYRODINIUM BAHAMENSE, PLATE, 1906.
- Authors
Wall, David; Dale, Barrie
- Abstract
Germination experiments demonstrate that the "hystrichosphere" called Hemicystodinium zoharyi, which previously has been found only as a microfossil organism, is the resting spore stage in the life history of Pyrodinium bahamense, a modern bioluminescent, thecate dinoflagellate. The morphology of this spore, together with new details of the thecal structure and ontogeny of P. bahamense, is described, and it is concluded that Pyrodinium is closely related to Gonyaulax but worthy of retention as a discrete genus. The geological history of P. bahamense is traceable to the Eocene through fossil occurrences of its spore, and it is suggested that additional pyrodinioid dinoflagellates which now are extinct were represented in Lower Tertiary seas by another hystrichosphere genus, called Homotryblium. Selected aspects of the physiology and ecology of modern dinoflagellate resting spores are discussed briefly with special reference to Pyrodinium.
- Subjects
GERMINATION; DINOFLAGELLATES; BIOLUMINESCENCE; PERIDINIALES; PHOTOBIOLOGY
- Publication
Journal of Phycology, 1969, Vol 5, Issue 2, p140
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/j.1529-8817.1969.tb02595.x