the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Echinodermata (phylum)
Echinozoa (superclass)
Echinoidea (class)
Perischoechinoidea (subclass)
Cidaroida (order)
pencil urchins (common name)
[hide inferior taxa]
Anthocidaris crassispina (species)