Question

What are the three classes of Porifera?

Answer 1

Porifera:

1. The marine animals that are referred to as sponges belong to family of phylum Porifera.
2. These animals are asymmetrical that have cellular body forms where the loose cells are composed.

Class of Porifera:

There are three main classes of phylum Porifera.

They include:

• Hexactinellida:

1. These are glass sponges that are made up of siliceous spicules.
2. Examples are Euplectella and Hylonema.

• Calcarea:

1. Calcarea is large Choanocyte cells that are made up of calcareous spicules.
2. Examples are Leucosolenia and Sycon.

• Demospongia:

1. Demospongia is made up of spongin fibers or siliceous spicules.
2. Examples are Euspongia and Spongilla.