List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• Gomphina melanegis (species of Venus clam)

usually written using kana alone  noun  noun (generic) 

• Xenostrobus securis (species of saltwater mussel)

usually written using kana alone  noun  noun (generic) 

• Mactra veneriformis (species of trough shell)

usually written using kana alone  noun  noun (generic) 

• Meretrix petechialis (species of hard clam)

usually written using kana alone  noun  noun (generic) 

• Lanceolaria grayana (species of freshwater mussel)

usually written using kana alone  noun  noun (generic) 

• Sphaerium japonicum (species of fingernail clam)

usually written using kana alone  noun  noun (generic) 

• Corbicula japonica (species of basket clam)

usually written using kana alone  noun  noun (generic) 

• Asian green mussel (Perna viridis)

usually written using kana alone  noun  noun (generic) 

• Pronodularia japanensis (species of freshwater mussel)

usually written using kana alone  noun  noun (generic) 

• Uperotus clava (species of shipworm)