Mediaster is a genus of starfish in the family Goniasteridae. It was circumscribed in 1857 by William Stimpson for M. aequalis, the genus's type species. Its junior synonym is the genus Isaster, which was circumscribed in 1894 by Addison Emery Verrill for the species now known as M. bairdi. Verrill himself synonymized the two genus names in 1899.
GENUS
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Mediaster is a genus of starfish in the family Goniasteridae. It was circumscribed in 1857 by William Stimpson for M. aequalis, the genus's type species. Its junior synonym is the genus Isaster, which was circumscribed in 1894 by Addison Emery Verrill for the species now known as M. bairdi. Verrill himself synonymized the two genus names in 1899.
==Species== , the World Register of Marine Species lists the following species as being in the genus: Mediaster aequalis Stimpson, 1857 Mediaster arcuatus (Sladen, 1889) Mediaster australiensis H.L. Clark, 1916 Mediaster bairdi (Verrill, 1882) Mediaster boardmani (Livingstone, 1934) Mediaster brachiatus Goto, 1914 Mediaster capensis H.L. Clark, 1923 Mediaster gartrelli H.E.S. Clark, 2001 Mediaster murrayi Macan, 1938 Mediaster ornatus Fisher, 1906 Mediaster pedicellaris (Perrier, 1881) Mediaster praestans Livingstone, 1933 Mediaster sladeni Benham, 1909 Mediaster tenellus Fisher, 1905 Mediaster transfuga Ludwig, 1905
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