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 Echinometridae (diagrammatic scheme of ambulacra and interambulacra) Description a. Echinometra: The long axis passes through IA 3 and A I. b. Heterocentrotus: The long axis runs approximately along the border of A lV / lA 4 and lA 1 /A ll, sometimes very slightly turned to one or the other side. When placed in the "normal" orientation with A lll anterior, the test is transverse oval. Colobocentrotus and Podophora also belong to this group.JPG file - 100.66 kB - 1 880 x 856 pixelsadded on 2005-02-23486 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha...© 2005 Schultz, HeinkeClick here to return to the thumbnails overview |
