tetractinellida

Tetractinellida

Te*trac`ti*nel"li*da\, n. pl. [NL., from Gr. te`tra- tetra- + ?, ?, ray, spoke.] (Zo["o]l.) A division of Spongi[ae] in which the spicules are siliceous and have four branches diverging at right angles. Called also Tetractinellin[ae].
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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