Eleutherozoa
| Eleutherozoa Temporal range: | |
|---|---|
Fromia indica (Asteroidea) Ophiura ophiura (Ophiuroidea) Phyllacanthus imperialis (Echinoidea) Sollasina cthulu † (Ophiocistioidea †) Actinopyga echinites (Holothuroidea) | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Subphylum: | Eleutherozoa Bell, 1891 |
| Classes | |
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Eleutherozoa is a subphylum of echinoderms. They are mobile animals with the mouth directed towards the substrate. They usually have a madreporite, tube feet, and moveable spines of some sort. It includes all living echinoderms except for crinoids. The monophyly of Eleutherozoa has been proven sufficiently well to be considered "uncontroversial."