zephyr writes:
I have one silly question here - why are the radially symmetric echinodermata found under the bilateria? Looks like a farg-up to me....
Though adult echinoderms are radially symmetric, echinoderm larvae are bilaterally symmetric -- and resemble the larvae of indirect-developing hemichordates.
Here's a
nice gallery of echinoderm larvae -- they have little resemblance to their adults, and those adults grow from a special part of them. That "farg-up" is caused by their style of growth.
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