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n. pl.1.(Zool.) An extensive division of gastropod Mollusca in which the loop or visceral nerves is twisted, and the sexes separate. It is nearly to equivalent to Prosobranchiata.
References in periodicals archive ?
On the origin of major gastropod groups, with special reference to the Streptoneura (Mollusca).
On the origin and evolution of major gastropod groups with special reference to the Streptoneura.