the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Urochordata (subphylum)
Ascidiacea (class)
Stolidobranchia (order)
Pyuridae (family)
Halocynthia (genus)
[hide inferior taxa]
Halocynthia aurantium (species)
Halocynthia papillosa (species)
Halocynthia pyriformis (species)
Halocynthia roretzi (species)