The most recently discovered group in this phylum is the family Xyloplacidae, small organisms living in water on decaying wood. The bodily functions of these deuterostomes are driven by a sequence that begins at the madreporite then follows the stone canal and a circular ring canal into canals that lead to ampullae, which help them move about on tube feet. For 10 points, name this aquatic phylum characterized by a water vascular system, named for many of its members' spiny skin, examples of which include sea cucumbers a
The most recently discovered group in this phylum is the family Xyloplacidae, small organisms living in water on decaying wood. The bodily functions of these deuterostomes are driven by a sequence that begins at the madreporite then follows the stone canal and a circular ring canal into canals that lead to ampullae, which help them move about on tube feet. For 10 points, name this aquatic phylum characterized by a water vascular system, named for many of its members' spiny skin, examples of which include sea cucumbers and starfish.
The most recently discovered group in this phylum is the family Xyloplacidae, small organisms living in water on decaying wood.