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Spinulosida
The Spinulosida are an order of sea stars containing at least 120 species in seven genera and two families. Spinulosids completely lack pedicellariae and have a delicate skeletal arrangement. Their name comes from the presence of numerous low spines on the aboral (upper) surface. No fossil spinulosids have yet been found. ==Taxonomy== The following family is recognised by the World Register of Marine Species:〔 * Echinasteridae Verrill, 1870
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