Date & Time : 20, October 2017 06:58
Phylum - Porifera
Class - Calcarea
Order - Heterocoela
Genus - Sycon or Scypha
These are found in abundance near North Atlantic shores.
It is solitary or colonial marine sponge found attached to the rocks in shallow waters.
- It has a vase-shaped cylindrical body measuring about 20-30 mm in length.
- Each cylinder opens to the exterior by an osculum.
- Body surface contains numerous pores called ostia or incurrent pores.
- Osculum is encircled by a fringe of monoaxon spicules.
- Body wall consists of outer dermal epithelium, called pinacoderm and inner flagellated epithelium, called choanoderm.
- Skeleton comprises of calcareous spicules of monaxon, triaxon and tetraxon type.
- Choanocytes (flagellated cells) are present in only radial canals.
- Water enters the body via ostia and enters the incurrent canals from where it passes into radial canals through prosopyles.
- From radial canals, water enters the excurrent canal through apopyles.
- Water reaches to spongocoel through the gastral ostia and passes out by osculum.
- Reproduction takes place by both asexual (budding and regeneration) and sexual (by ova and sperms).