Purple sunstar
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phylum | Chordata | The purple sunstar, northern sunstar, or smooth sun star, Solaster endeca, is a species of starfish in the family Solasteridae. Solaster endeca can grow to about 40 cm (16 in) across, but 20 cm (7.9 in) a more normal adult size is half that. It is a robust species with 9 or 10 arms (occasionally any number from seven to 13) set around a large disc. The aboral (upper) surface is formed of calcareous plates densely covered with paxillae, peg-like projections covered in tiny spinelets. No pedicellariae are present, but groups of two to three gills are found between the plates.
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class | Asteroidea | |
order | Velatida | |
family | Solasteridae | |
genus | Solaster | |
species | S. endeca |