|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Pectinida - Pectinidae
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.
|U. S. Grant and H. R. Gale 1931||Shell of small or moderate size, noticeably higher than wide and of low convexity except in the distorted type variety, valves almost equally convex; ribs small, low, and romaded, or high, wide, and square, varying in number from 15 to 19.|