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The genera Asterodiscides A. M. Clark, Pau/ia Gray and Amphiaster Verrill are compared and assigned to a new family. The relationship between Paulia and Pau/iel/a is discussed. Five new species and one new subspecies are described for the genus Asterodiscides with the holotype of the type-species, Asterodiscus e/egans Gray, being fully described for the first time. Asterodiscus hiroi Hayashi is considered to be con specific with A. he/enotus (Fisher) and two juvenile specimens of the species are described. Examination of many juvenile specimens has allowed an assessment to be made of the relative constancy of form of the various structural elements used in determining specific limits within the family. A key is given to the genera and species of the family.

A new family of Asteroidea (Echinodermata), with the description of five new secies and one new subspecies of Asterodiscides