Tetractinomorpha
Tetractinomorpha (phylum Porifera, class Demospongiae) A subclass of sponges many of which have a radial body structure. Most lack organic fibres in the skeleton. Most forms are oviparous.
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Demosponges , Demospongiae (Demospongea; phylum Porifera) A class of sponges which occur in both marine and freshwater environments. They have a leucon body struct… Columella , columella
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Tetractinomorpha