Order Arbacioida Gregory 1900 (sea urchin)
Alternative spellings: Arbacina, Arbacina
Full reference: J. W. Gregory. 1900. The Echinoidea. A Treatise on Zoology. Part III. The Echinodermata, A. & C. Black, London 282-332
Parent taxon: Echinacea according to A. Kroh and A. B. Smith 2010
See also Berndt 2003, Clark and Twitchell 1915, Donovan 1993, Fell and Pawson 1966, Linder et al. 1988, Smith 1995 and Smith 2009
Sister taxa: Besairiecidaris, Bramus, Camarodonta, Crinocidaris, Glyphopneustidae, Plesiocidaroida, Stirodonta, Stomopneustoida, Temnopleuroidea
Subtaxa: Acropeltidae Arbaciidae Arbacioina Dialithocidaris Glypticidae Goniopygidae Pygmaeocidaris Salenioina Tetrapygus
Ecology: slow-moving low-level epifaunal grazer