Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Nephrozoa (Eubilateria)
Protostome (Protostomia)
Spiralia (Spiralians)
Lophotrochozoa
Mollusca (Molluscs)
Bivalvia
Autolamellibranchiata
Palaeoheterodonta
Unionoida (Unionida)
Unionoidea
Unionidae
Unio (Unio (bivalve))
Thick shelled river mussel (Unio crassus)
Unio crassus crassus (50654977)