DURING the course of an ecological investigation of the polychæte annelid Pygospio elegans Clap., a remarkable mode of asexual reproduction was noticed. The species were collected at the small island ...
The polychaete Streblospio benedicti is unusual in that several field populations consist of individuals that exhibit either planktotrophic or lecithotrophic larval development. Planktotrophy in this ...
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