|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Sowerbyella (Sowerbyella) rectangularis
Strophomenata - Strophomenida - Sowerbyellidae
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.
|C. M. O. Rasmussen et al. 2012||Shell small, moderately to weakly concavo- convex, with transverse outline. Interareas low, covered partly by pseudodeltidium and chilidial plates, respectively. Dense, unequally parvicostellate ornament separated by 12 to 14 accentuated costae. Ventral muscle field bilobed, cordate. Short, thick ventral median septum. Cardinal process trifid, undercut. Dorsal median septum absent.|