the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Echinodermata (phylum)
Echinozoa (superclass)
Echinoidea (class)
Euechinoidea (subclass)
Echinoida (order)
Strongylocentrotidae (family)
Strongylocentrotus (genus)
[hide inferior taxa]
Strongylocentrotus droebachiensis (species)
Strongylocentrotus franciscanus (species)
Strongylocentrotus intermedius (species)
Strongylocentrotus nudus (species)
Strongylocentrotus purpuratus (species)
Strongylocentrotus sp. (species)