The Class Hexactinellida is further organized into finer groupings including:
- Subclass (4): Amphidiscophora · Ceractinomorpha · Hexasterophora · Tetractinomorpha
- Order (11): Amphidiscosida · Aulocalycoida · Hexactinellida · Hexactinosa · Hexactinosida · Lychniscosida · Lyssacinosa · Lyssacinosida · Lyssakida · Reticulosa · Sphinctozoa
- Species: ZipcodeZoo has pages for 699 species and subspecies in the Class Hexactinellida.
More info about the Order Sphinctozoa may be found here.
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