the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Mollusca (phylum)
Bivalvia (class)
Pteriomorphia (subclass)
Ostreoida (order)
Ostreidae (family)
Crassostrea (genus)
[hide inferior taxa]
Crassostrea ariakensis (species)
Crassostrea gigas (species)
Crassostrea nippona (species)
Crassostrea virginica (species)