the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Echinodermata (phylum)
Echinozoa (superclass)
Echinoidea (class)
Euechinoidea (subclass)
Arbacoida (order)
Arbacia lixula (species)
black urchin (primary common name)
[show inferior taxa]