|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Arcida - Glycymerididae
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.
|F. M. Anderson 1958||Shell of medium size, a little inflated, subcircular in outline, nearly equilateral, with low beaks, scarcely rising above margin of valves; shell of moderate thickness; surface marked by concentric growth lines and by slight undulations, crossed by numerous (30-35) rather fine radial ribs extending from beak to basal margin of shell; hinge plate of holotype only partly exposed, but set with radially arranged cardinal teeth, 10 or more on either side of the median line, curving outward and downward at ends of hinge plate ; inner margin of the shell smooth at the front and rear, denticulate only at the base of the shell opposite the beak, for about 10 mm.|