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Q.
Animals having pseudocoelomate and triploblastic nature are present in phyla
UP CPMTUP CPMT 2008
Solution:
The name aschelminthes was proposed by Grobben (1910), in place of the order name Nemathelminthes. These groups of animals are known as pseudocoelomates, because body cavity is not lined by mesoderm. They are triploblastic, bilateral symmetrical, unsegmented, flat and vermiform.