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Dialithocidaris
Taxonomy
Dialithocidaris was named by Agassiz (1898).
It was assigned to Arbaciidae by Fell and Pawson (1966); and to Arbacioida by Smith and Wright (1993).
It was assigned to Arbaciidae by Fell and Pawson (1966); and to Arbacioida by Smith and Wright (1993).