|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Strophomenata - Orthotetida - Triplesiidae
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.
|L.R.M. Cocks and T.L. Modzalevskaya 1997||Sub-oval outline with width greater than length. Biconvex profile. Asymmetrical shell shape anteriorly. Ribs variably developed, absent posteriorly, between five and seven present in each valve half. Incurved beak and small interarea. Interior not known.|