Genus
Protocardia Beyrich, 1845
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Bivalvia |
| Subclass | Heterodonta |
| Order | Cardiida |
| Family | Cardiidae |
| Genus | Cardium |
| Parvicardium | |
| Protocardia | |
| Species | concinna |
See also
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Bivalvia |
| Subclass | Heterodonta |
| Order | Cardiida |
| Family | Cardiidae |
| Genus | Cardium |
| Parvicardium | |
| Protocardia | |
| Species | concinna |