|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Strophomenata - Strophomenida - Glyptomenidae
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.
|I. F. Nikitin et al. 2003||Shell strongly concavoconvex, about 85% as long as wide; ventral valve strongly and evenly convex, about 40% as thick as long with low apsacline interarea; dorsal valve evenly concave, rarely slightly geniculated in large specimens; radial ornament inequally parvicostellate with 3 to 4 parvicostellae between accentuated ribs and 10 to 12 ribs per 3 mm along the anterior margin of adult specimens; weak, oblique rugellae developed along the posterior margin.|