(Mediaster) (Mediaster) is a biological genus in the family Goniasteridae and order Valvatida.
Mediaster aequalis
Mediaster arcuatus
Mediaster australiensis
Mediaster bairdi
Mediaster boardmani
Mediaster brachiatus
Mediaster capensis
Mediaster dawsoni
Mediaster elegans
Mediaster gartrelli
Mediaster murrayi
Mediaster ornatus
Mediaster pedicellaris
Mediaster praestans
Mediaster sladeni
Mediaster tenellus
Mediaster transfuga
Akelbaster
Anchitosia
Anthenoides
Apollonaster
Astroceramus
Astropatricia
Astrothauma
Atelorias
Calliaster
Calliderma
Ceramaster
Chitonaster
Circeaster
Cladaster
Diplasiaster
Eknomiaster
Enigmaster
Eratosaster
Evoplosoma
Floriaster
Fromia
Gigantaster
Gilbertaster
Glyphodiscus
Goniaster
Hippasteria
Iconaster
Johannaster
Kermitaster
Lithosoma
Litonotaster
Lydiaster
Mabahissaster
Mariaster
Mediaster
Milteliphaster
Nectria
Neoferdina
Notioceramus
Nymphaster
Ogmaster
Pawsonaster
Peltaster
Pentagonaster
Pergamaster
Pillsburiaster
Plinthaster
Pontioceramus
Progoniaster
Pseudoceramaster
Pseudogoniodiscaster
Rosaster
Ryukuaster
Sibogaster
Siraster
Sphaeriodiscus
Stellaster
Stellasteropsis
Sthenaster
Styphlaster
Tessellaster
Toraster
Tosia