PHYLUM ECHIURA NEWBY, ECHIURANS General characteristics Morphology. The phylum Echiura consists of a group of unsegmented, bilaterally symmetrical coelomate animals, often mentioned in English literature as spoon-

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• Taxonomy
• Echiurans
• Annelids
• Echiura
• Echiuroidea
• Phyla
• Acorn worm
• Sipuncula
• Onychophora
• Zoology
• Biology
• Protostome