archiannelid

Noun
  1. Small primitive marine worm lacking external segmentation and resembling polychaete larvae (synset 101937485)
    is a type of: annelid, annelid worm, segmented worm - worms with cylindrical bodies segmented both internally and externally
    belongs to: archiannelida, class archiannelida - a class of Annelida

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