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Morphology and Life History of Colpoda maupasi, Bensonhurst Strain

Authors

  • MORTON PADNOS,

    1. Protista Research Laboratory, Brooklyn, New York; College of Mount St. Vincent, New York; New York Aquarium, New York Zoological Society, New York
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  • SOPHIE JAKOWSKA,

    1. Protista Research Laboratory, Brooklyn, New York; College of Mount St. Vincent, New York; New York Aquarium, New York Zoological Society, New York
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  • ROSS F. NIGRELLI

    1. Protista Research Laboratory, Brooklyn, New York; College of Mount St. Vincent, New York; New York Aquarium, New York Zoological Society, New York
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Abstract

Strains of Colpoda maupasi previously reported were found to produce only octogenic reproductive cysts and monogenic wrinkled resting cysts. The present form of C. maupasi (Bensonhurst strain), isolated by the senior author in 1949, was found to produce, in addition to the above, quadrigenic reproductive cysts, digenic corrugated (wrinkled) resting cysts, and smooth thick-walled monogenic, digenic and quadrigenic resting cysts. Some of the factors leading to the development of these cysts in the Bensonhurst strain are believed to be related to nutrition, age and size of the trophic forms. The cytological changes in encystment and excystment were followed with particular attention to aging monogenic resting cysts. The latter were observed for over 4 years.

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