Protocardia

Protocardia Temporal range: Mesozoic PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Cardiida
Family:	Cardiidae
Genus:	†Protocardia

Protocardia is an extinct genus of saltwater clams, marine bivalve mollusks in the subfamily Protocardiinae of the family Cardiidae, the cockles.[1]

The internal anatomy of individuals in this genus is sometimes preserved in phosphate.[2]

References

1. Schneider, S.; Fürsich, F. T.; Werner, W. (2010). "Marking the Kimmeridgian-Tithonian transition with a bivalve – Protocardia gigantea sp. Nov. (Bivalvia: Cardiidae) and its relatives from the Lusitanian Basin (Portugal)". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 258: 167. doi:10.1127/0077-7749/2010/0093.
2. Wilby, P. R.; Whyte, M. A. (1995). "Phosphatized soft tissues in bivalves from the Portland Roach of Dorset (Upper Jurassic)". Geological Magazine. 132: 117. doi:10.1017/S001675680001147X.