|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Orthida - Euorthisinidae
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.
|J. L. Benedetto 2007||Medium-sized, subequally biconvex shells with finely multicostellate ornament. Ventral muscle field suboval, bounded by conspicuous ridges. Strongly diverging brachiophores supported by bladelike bases which in juvenile specimens unite medially to form narrow V-shaped septalium; in mature specimens brachiophore bases merged with sides of median ridge, becoming approximately parallel to each other and delimiting small U-shaped notothyrial chamber. Cardinal process absent. Dorsal median ridge short and broad in adult specimens.|