Echinoderm Hox Cluster Comparison (image) Okinawa Institute of Science and Technology (OIST) Graduate University Share Print E-Mail Caption This is a comparison between echinoderm Hox clusters of the Crown of Thorn starfish and the sea urchin. The Crown of Thorns Hox Cluster show 'colinearity,' more closely resembling Hox clusters of chordates. Credit OIST Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.