Pentagonaster is a genus of sea stars in the family Goniasteridae.
Species list Many species previously in the genus have been assigned to other genera in the subfamily, some also have been absorbed into the following species: Image Scientific name Distribution Pentagonaster duebeni Gray, 1847 AustraliaPentagonaster elegans Blake in Blake & Zinsmeister, 1988 Pentagonaster gibbosus Perrier, 1875Australia Pentagonaster pulchellus Gray, 1840 New ZealandPentagonaster stibarus H.L. Clark, 1914 Australia
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