"Eleutherozoa is a proposed subphylum of echinoderms. They are mobile animals with the mouth directed towards the substrate. They usually have a madreporite, tube feet, and ...
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moveable spines of some sort, and some have Tiedemann´s bodies on the ring canal. All living echinoderms except Crinoidea belong here." - (en.wikipedia.org 20.12.2020)
