|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Strophomenata - Strophomenida - Strophomenidae
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.
|J. K. Pope 1982||Shells large; outline semicircular, subrectangular, or subtriangular, obscurely nasute; alate. Dorsal valve strongly convex. Parvicostellate, alternation irregular. Cardinal extremities deeply and coarsely rugose. Diductor muscle field wide, flabellate, radially ridged; muscle-bounding ridge scalloped. Cardinalia small relative to size of valve.|