|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Ostreida - Ostreidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|E. L. Packard 1922||Shell thick, rugose ; upper valve with a pronounced ridge extending from the umbones to the ventral margin. Muscle scars not shown on the type. Length of type, 60 mm.; height, 68 mm;. diarneter , 20 mm.|