Echinodermata , class: Ophiuroidea (brittlestars

echinodermata are absent 4 STRONGYLOCENTROTUS Phylum Echinodermata Subphylum Eleutherozoa Class Echinoidea Subclass Regularia Order 28 Biology of Echinodermata

Characteristic Features of Phylum Echinodermata · These are exclusively marine animals · The larval forms show bilateral symmetry and adult forms show radial echinodermata Echinodermata , phylum of exclusively marine invertebrate animals The 6000 known species occur from shores to greatest depths