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Author(s): SHOSTAK S; KOLLURI V
Title: SYMBIOGENETIC ORIGINS OF CNIDARIAN CNIDOCYSTS
Source: SYMBIOSIS 19 (1): 1-29
Date: 1995
Document Type: Journal : Article
DOI:
Language: English
Comment:
Address: UNIV PITTSBURGH,DEPT INFORMAT SCI,PITTSBURGH,PA 15260.
Reprint: SHOSTAK, S, UNIV PITTSBURGH,DEPT BIOL SCI,A234 LANGLEY
HALL,PITTSBURGH,PA 15260. E-mail:
Author Keywords:
KeyWords Plus:
Abstract: Cnidarian cnidocysts may have been derived through symbiogenesis from organelles in protoctistans. In order to trace the course of cnidocyst evolution back to originary types, we have assembled a cnidocyst database from information in the systematic literature. That database is now available to the public on the World Wide Web at http://www.pitt.edu/similar to sshostak/cnidocyst.html. It contains the cnidomes, or census of cnidocysts, for 809 species and measurements on lengths and widths of cnidocyst capsules. The present analysis of cnidomes in the database suggests that cnidocysts belong to no less than two families. Members of one family of cnidocysts are found in Anthozoa, whereas members of both families are found in Medusozoa. Competition among cnidocyst families in the microcosm of organisms, in addition to the natural selection of cnidarians in their external environments, may have contributed to the evolution and diversification of cnidarian cnidocysts.
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