Q13 of 525 Page 260

Name major phyla of Animal kingdom. Write down one character and one example of each of them.

There are ten major phyla of Animal kingdom. These are-

(1) Porifera- Members of this phylum are commonly known as sponges. They are generally marine and mostly asymmetrical animals.


Example- Spongilla (Fresh water sponge)


(2) Coelenterata- They are aquatic, mostly marine, sessile or free-swimming, radially symmetrical animals.


Example- Hydra


(3) Platyhelminthes-They are bilaterally symmetrical, triploblastic and acoelomate animals with organ level of organisation.


Example- Taenia (Tapeworm)


(4) Nematoda- They are bilaterally symmetrical, triploblastic and pseudocoelomate animals.


Example- Ascaris (Round Worm)


(5) Annelida- They are triploblastic, metamerically segmented and coelomate animals.


Example- Hirudinaria (Blood sucking leech).


(6) Arthropoda- They are bilaterally symmetrical, triploblastic, segmented and coelomate animals.


Example- Limulus (King crab)


(7) Mollusca- Molluscs are terrestrial or aquatic having an organ-system level of organisation.


Example- Pila (Apple snail)


(8) Echinodermata- They are spiny skinned free-living marine animals.


Example- Asterias (star fish)


(9) Protochordata- These animals are bilaterally symmetrical, triploblastic and have a coelom.


Example- Amphioxus


(10) Chordata- Animals have notochord.


Example- Scoliodon (Dog fish)


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