fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     01 Class †Camptostromoidea
     02 Class †Edrioasteroidea Billings, 1858
     03 Class †Helicoplacoidea Durham & Caster, 1963
     04 Class †Blastoidea Say, 1825
     05 Class †Parablastoidea Hudson, 1907
     06 "Cystoidea"
     07 Class †Paracrinoidea Regnell, 1945
     08 Class †Ctenocystoidea Robison & Sprinkle, 1969
     09 Class †Homostelea Gill & Caster, 1960
     10 Class †Homoiostelea Gill & Caster, 1960
     11 Class †Stylophora Gill & Caster, 1960 - stylophorans
     12 Class †Ophiocistioidea (Sollas, 1899)
     13 Class Holothuroidea (de Blainville, 1834) - sea cucumbers
     14 Asterozoa
     15 Class Crinoidea Miller, 1821 - sea lilies and feather stars
     16 Class Echinoidea (Leske, 1778) - sea urchins and sand dollars