fossil marine animal genera Linnaeus, 1758 - animals Phylum Echinodermata Bruguière, 1789 - echinoderms Asterozoa 1 Class Somasteroidea Spencer, 1951 2 Class Asteroidea Blainville, 1830 - sea stars 3 Class Ophiuroidea Gray, 1840 - brittle stars and basket stars