Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Why hemichordata was earlier considered as sub phylum under chordata but y now it is a separate phylum?
Hemichordata was earlier considered as a sub-phylum under phylum Chordata. But now it is placed as a separate phylum under non-chordata. This phylum consists of a small group of worm-like marine animals with organ-system level of organisation.
Hemichordates was earlier considered as a sub phylum under chordates due to presence of flexible hollow tube called stomocord. Later many structural and physical differences were found between notochord and stomochord. And stomochord was said to be a different structure wrt. Notochord.Thus hemichordata/stomochordata was created as a separate phylum. E.g- stomochord is endodermal in origin and a non-supportive structure. Whereas notochord is mesodermal in origin and is a supportive structure. Hope it helps. Then do give a thumbsup!
Find solution of question on doubt solving app Instasolv
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -