Exclusively marine and cosmopolitan, present in seas depths.
Mostly sedentary,pelagic or swimming.
May be solitary,or colonial.
size 0.25 to 250mm, shape and size.
Having no tail.
Body covered with tunicine similar to celluse so called as tuniacta.
Coelom absent
Notochord present only in larval stage hence called as urochordata..
Alimentry canal complete.
Ciliary feeders.
Respiration through test and gill-slits.
Blood-vascular system open.
Excretion by neural gland, pyloric gland and nephrocytes.
Mostly hermaphrodite.
Fertilization external.
Metamorphosis retrogressive.
Asexual reproduction by budding.
Mostly sedentary,pelagic or swimming.
May be solitary,or colonial.
size 0.25 to 250mm, shape and size.
Having no tail.
Body covered with tunicine similar to celluse so called as tuniacta.
Coelom absent
Notochord present only in larval stage hence called as urochordata..
Alimentry canal complete.
Ciliary feeders.
Respiration through test and gill-slits.
Blood-vascular system open.
Excretion by neural gland, pyloric gland and nephrocytes.
Mostly hermaphrodite.
Fertilization external.
Metamorphosis retrogressive.
Asexual reproduction by budding.
No comments:
Post a Comment