Department of Zoology at ANDC/Zoology Museum/Museum specimens/Annelida/Heteronereis

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{|cellpadding="5" cellspacing="6" style="width:100%;background:#FFFFFF; border-style:solid; border-width:3px; border-color:#0066FF;" Date & Time : 28, August 2024      
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Distribution:- free living worm found on surface of sea.

Habit and Habitat:- found in marine, swimming type habitat.

Identifying characters:-


 * It is the sexual phase of Nereis.
 * Body:-  differentiated into two distinct regions: an anterior atoke or non sexual region and a posterior epitoke or sexual region containing ova and sperms
 * Metamerism:- body consists of about 200 segments or metameres.
 * Head:- initial segments fused to form head consisting of eyes and peristomium.
 * Prostomium contains prostomial tentacles, ocelli and palps.
 * Parapodiacontain additional foliaceous lobes and setae become oar like.
 * Reduction of muscles and alimentary canal is observed due to development of gonads.