Pentacrinus subangularis, crinoids Styracosaurus The nervous system of starfish

The nervous system of starfish is a simple network of nerves

its heavy muscular tail and their herd behavior

as their fossils are common in the Old Red Sandstone formation studied by geologists in the early 19th century

The forelimbs were even more robust than the hindlimbs

Pentacrinus subangularis, crinoids Styracosaurus The nervous system of starfishCrinoids are assigned to the phylum Echinodermata, a group of radially symmetrical marine animals, such as the starfish, sea urchins, and brittle stars. Crinoids are commonly referred to as "sea lilies". These flower like marine invertebrate animals are beautifully colored and live as solitary individuals. This species is characterized by a globular body enclosed by a small calyx, from which freely moving arms extended upward to gather food. At the