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![Ophidiaster helicostichus Sladen, 1889 [holotype of Ophidiaster astridae Engel, 1938]](https://virtualcollections.naturalsciences.be/virtual-collections/recent-invertebrates/echinodermata/asteroidea/ophidiaster-helicostichus-sladen-1889-holotype-of-ophidiaster-astridae-engel-1938/ophidiaster_p3084585.jpg/@@images/image.jpeg "Ophidiaster helicostichus Sladen, 1889 [holotype of Ophidiaster astridae Engel, 1938]")