|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Orthida - Heterorthidae
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 et al. 2013||Gently ventribiconvex, subcircular shells with fascicostellate ornament of 5–6 costae per 5 mm at anterior margin. Ventral muscle field large, suboval, extending for about 42 per cent valve length. Cardinal process expanded into a prominent, often trilobate myophore occupying the whole notothyrial platform. Thick brachiophores supported by proportionally short bases converging medially towards floor of valve.|