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Primitive Patterns of Reproduction In The Foraminifera (Protists)

Published online by Cambridge University Press:  02 July 2020

Susan T. Goldstein
Susan T. Goldstein*
Affiliation:
Department of Geology and School of Marine Programs, University of Georgia, Athens, GA30602-2501
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Extract

The Foraminifera are an enormously successful group of predominantly marine protists. They first appeared in the rock record >500 million years ago and currently are found in most planktonic and benthic marine and marginal marine environments. Though complete life cycles are known for only ˜30 of the >10,000 described extant species, these taxa illustrate reproductive patterns that are among the most diverse of all protists. The foraminiferal life cycle typically is characterized by an alternation of sexual and asexual generations during which meiosis occurs in the early phases of schizogony in the agamont. Sexual reproduction involves the production of biflagellated, triflagellated, or amoeboid gametes, and fertilization may be gametogamous, gamontogamous, or autogamous. Of these options, most Foraminifera for which sexual reproduction has been documented (44 species) produce many thousands of small biflagellated gametes that are shed directly into the surrounding seawater where gametogamous fertilization occurs.

Type
Biological Ultrastructure (Cells, Tissues, Organ Systems)
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 1280 - 1281
Copyright
Copyright © Microscopy Society of America

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References

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