In this article we will discuss about Sponges:- 1. History of Sponges 2. Definition of Sponges 3. Origin 4. General Characters 5. Classification 6. General Organisation 7. Canal System 8. Skeleton 9. Reproduction 10. Development 11. Animal Nature 12. Affinities 13. Economic Importance. Contents: History of Sponges Definition of Sponges Origin of Sponges General Characters of Sponges Classification of Sponges [...]
In this article we will discuss about Spicules:- 1. Meaning of Spicules 2. Classification of Spicules 3. Development 4. Taxonomic Importance. Meaning of Spicules: The spicules or sclerites are definite bodies, having a crystalline appearance and consisting in general of simple spines or of spines radiating from a point. They have an axis of organic material around which is deposited [...]
The following points highlight the eleven representative types of Sponges. The types are: 1. Euplectella 2. Hyalonema 3. Pheronema 4. Oscarella 5. Cliona 6. Tethya 7. Halichondria 8. Spongilla 9. Chalina 10. Euspongia 11. Hippospongia. Type # 1. Euplectella: Euplectella aspergillum (Fig. 27.1) is commonly known as Venus' flower basket. It is a glass sponge. The body is cylindrical and [...]