Demospongiae

Demospongiae
n. [Gr. demos, multitude; spongos, sponge]
A class of sponges composed of spongin fibers alone or together with siliceous spicules that are differentiated into megascleres (larger size) or microscleres (smaller size) of diverse shapes.

Online Dictionary of Invertebrate Zoology. . 2005.

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