What is a division of opisthobranchiate mollusks having the branchiæ in a wreath or group around the anal opening, as in the genus Doris called?
pygobranchia — A division of opisthobranchiate mollusks having the branchiæ in a wreath or group around the anal opening, as in the genus Doris. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00