Presence of segmentation-phylum-arthropods proximal
Considering the presence of segmentation (metameres) in their body to which other already studied phylum are arthropods proximal?
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Considering their metameric characteristic arthropods are proximal to annelids which also have segmented bodies.
In embryonic development of some arthropods there are fusions of the metameres forming structures such as, for example, cephalothorax of the arachnids.
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