Echinodermata and deuterostome invertebrates

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

Echinodermata ) from the Champlainian Guttenberg Forma- tion of the Upper Mississippi Valley Region J Paleontol 5 : 631-653

echinodermata Characteristics of Phylum Echinodermata Species · Spiny, bumpy skin · Five-sided radial symmetry · Presence of a water vascular system · Tube feet

echinodermata Echinodermata · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 (5