Comparative Morphology of Echinoderm Sperm and Possible Phylogenetic Implications |
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| Authors: | CHIA, FU-SHIANG ATWOOD, DAVID CRAWFORD, BRUCE |
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| Affiliation: | Department of Zoology, University of Alberta Edmonton, Alberta, Canada T6G 2E1 |
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| Abstract: | The sperm morphology of at least 7 crinoids, 11 ophiuroids,23 asteroids, 23 holothuroids, and 37 echinoids is known. Forall the known crinoids, ophiuroids, and asteroids, the spermare spherical, while those of echinoids are conical. Holothuroidsperm are basically spherical, with two exceptions: cylindricalin Cucumaria lubrica and tabloid in Cucumaria pseudocurata.The possible implications of sperm morphology in the mode offertilization and in echinoderm phylogeny are discussed. |
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