Praecardium
Praecardium
Biota | Animalia | Mollusca | Bivalvia | Autobranchia | Pteriomorphia | Cyrtodontida | Praecardioidea | Praecardiidae | Praecardium
|  |  | Linnaeus, 1758 | Grobben, 1894 | Beurlen, 1944 | Scarlato & Starobogatov, 1971 | R. Hoernes, 1884 | R. Hoernes, 1884 | Barrande, 1881