Asteroidea - Hemizonida

Full reference: H. G. Owen. 1965. A monograph of the British Palaeozoic Asterozoa. Table of contents, supplement and index. Monograph of the Palaeontographical Society, London 1964:541-583

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

Sister taxa: Lacertasterias, Lepyriactinidae, Schondorfia, Taeniactinidae

Subtaxa: Arkonaster, Echinasterella, Helianthaster, Helianthasterinae, Hystrigaster, Lepidasterella

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Type: Helianthaster

Ecology: slow-moving low-level epifaunal carnivore