The following points highlight the three main classes of Phylum Porifera. The three classes are: 1. Calcarea or Calcispongiae— (Calcareous Sponges) 2. Hexactinellida or Triaxonida or Hyalospongiae—(Glass Sponge) 3. Demospongiae. Phylum Porifera: Class # 1. Calcarea or Calcispongiae— (Calcareous Sponges): [Calcarea, L. Calcarious = limy, Calcispongiae, L. Calcis = genitive of calx = lime or chalk] Features: (i) Exclusively marine, [...]
In this article we will discuss about Sycon:- 1. Habit and Habitat of Sycon 2. Structure of Sycon 3. Canal System 4. Physiology of Water Current Production 5. Microscopic Organisation 6. Nutrition, Respiration and Excretion 7. Reproduction 8. Development. Contents: Habit and Habitat of Sycon Structure of Sycon Canal System of Sycon Physiology of Water Current Production in Sycon Microscopic [...]
In this article we will discuss about Leucosolenia:- 1. Habit, Habitat and Distribution of Leucosolenia 2. Structure of Leucosolenia 3. Physiology 4. Reproduction 5. Development. Habit, Habitat and Distribution of Leucosolenia: Leucosolenia is a small, delicate branching, colonial marine sponge. It grows in shallow water below low tide mark on sea shore rocks where wave action is intense and is [...]