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Morphological characteristic of the phylum Annelida

Describe the morphological characteristic which evolutionarily approximates the beings of the phylum Annelida to the arthropods?

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The metameric feature, that is the body segmentation in metameres, approximates annelids to arthropods as such animals are segmented beings too. (Bristles existed in oligochaete and polychaete annelids are as well covered with chitin, the similar substance of the arthropod exoskeleton).

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