An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

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Term Definition

OLIGOPYRENIC   The less common type of sperm, which plays no part in fertilization; it is thought that they degenerate in the receptaculum and nourish the Eupyrenic sperm (perhaps analogous to NURSE EGGS; it has also been shown that the oligopyrenic sperm provide a transport mechanism for the eupyrenic sperm; see also: SPERM; EUPYRENIC.

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