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in Classification of Nonchordata by (49.3k points)
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Give the names of classes of phylum Porifera and their respective examples.

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1. Class – Calcarea (Calcispongiae) 

• The skeleton is of spiculues made up of CaCO3. 

• Examples – Leucosolenia, Syncon, Grantia, Leucilla etc. 

2. Class – Hexactinillida (Hyalospongiae) 

• The skeleton is of spicules made up of silica. 

• Examples – Hyalomena, Euplectella, Pheronema etc. 

3. Class Demospongiae 

• The skeleton is of sponging fibres. 

• Examples – Euspongia, Spongilla, Chalina, Cliona Spheceospongia etc.

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