the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Mollusca (phylum)
Bivalvia (class)
Pteriomorphia (subclass)
Mytiloida (order)
Mytilidae (family)
[hide inferior taxa]
Bathymodiolus (genus)
Mytilus (genus)
Perna viridis (species)