Ecdysozoans :-
First of all, let me tell you that ecdysozoans is very diverse. There is no specific groupism done under ecdysozoans. In a broad aspect ecdysozoans are known for nematodes and arthropods. However most accepatable groupism is:-
Ecdysozoans divided into:- (1) Scalidophora :- Loricifera, Kinorhyncha, Priapulida
(2) Nemaitoda :- Nematoda, Nematomorpha
(3) Panarthropoda :- Tardigrada, Onychophora, Arthropoda
Ecdysozoans have cuticle and they undergo ecdysis.
Scalidophora are marine psudocoelomates
Nemaitoda are free living and pseudocoelomates
Arthropoda are coelomates.
aRTHROPODA have got appendages etc which make them supperior
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