Asteroidea - Valvatida

Full reference: F. Schöndorf. 1906. Das Genus Sphaeraster und seine Beziehungen zu rezenten Seesternen. Jahresbericht des Vereins für Naturkunde 59:251-256

Parent taxon: Valvatida according to D. B. Blake 1989

Sister taxa: Acanthasteridae, Archasteridae, Arthraster, Asteriaceros, Asterinidae, Asterodiscididae, Asteropseidae, Chaetasteridae, Ganeriidae, Geinitzaster, Goniasteridae, Goniasteroidea, Granulosina, Leptaster, Mithrodiidae, Odontasteridae, Ophidiasteridae, Oreasteridae, Poraniidae, Pycinasteridae, Stauranderasteridae, Tumulosina

Subtaxa: Sphaeraster, Testudinaster, Valettaster

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Type: Sphaeraster

Ecology: slow-moving low-level epifaunal carnivore