|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||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.
|P. Chen et al. 2008||Small, concavo-convex shells, with moderate medial invagination at anterior margin; dorsal ridges weak, transverse, wavy, forming anterior bounding ridges of adductor muscle scars.|