The most obscure class of these organisms are the primitive Seisonidea, of which only two species are known. The shape of these animals can be either loricate or illoricate, which makes them either boxy or worm-like, depending on how thick and rigid their cuticle is. These creatures have a mouth mad
The most obscure class of these organisms are the primitive Seisonidea, of which only two species are known. The shape of these animals can be either loricate or illoricate, which makes them either boxy or worm-like, depending on how thick and rigid their cuticle is. These creatures have a mouth made of hardened proteins called the mastax. These animals are most notable for a structure on their (*) head called the corona, which is a ring of cilia that creates suction into their mouths and allows them to move through water. For ten points, name this phylum of microscopic "wheel animals."
The most obscure class of these organisms are the primitive Seisonidea, of which only two species are known.