|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Rhynchonellata - Orthida - Dicoelosiidae
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, concavo-convex in profile and bilobate in outline, about 90% as long as wide. Cardinal angles obtuse; maximum width near anterior margin; anterior commissure strongly uniplicate. Ventral valve evenly convex. Interarea relatively high, short and strongly apsacline; delthyrium high and relatively narrow. Dorsal valve concave. Notothyrium open and relatively wide. Ornamentation weakly costate. Internal features not preserved except for a dorsal median septum.|