symmetry of echinoderms

[bumpski20]

i thought all deuterostomes had bilateral symmetry and echinoderms are deuterostomes, but arent echinoderms just starfish? so wouldnt they have radial symmetry?? or are they bilaterally symmetrical?? ahhh i hate classifications!!!!!!!!!!!!

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[osimsDDS]

i thought all deuterostomes had bilateral symmetry and echinoderms are deuterostomes, but arent echinoderms just starfish? so wouldnt they have radial symmetry?? or are they bilaterally symmetrical?? ahhh i hate classifications!!!!!!!!!!!!

I believe when you are talking about deuterostomes and protostomes you are just talking about the embryology. Therefore deuterostomes develop radially while protostomes embryo's develop spirally...

 

[DRHOYA]

Echinoderms can be tricky. They are radially symmetical as adults, however as far as embryology is concerned, they are similar to chordates, and thus are classified as bilaterally symmetrical.