what is peristomium describethe segment behind
What is peristomium. Describe?
The segment behind the prostomium in annelids which contains the oral opening. This segment like the prostomium isn't a true segment and has no setal hairs, which are characteristic of phylum.
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what is peristomium describethe segment behind the prostomium in annelids which contains the oral opening this segment like the prostomium isnt a
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