|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.
|L. E. Popov et al. 2009||Shell suboval, slightly transverse; weakly developed dorsal sulcus fading anteriorly. Finely fascicostellate radial ornament with 19–21 primary ribs and 11–14 ribs per 3 mm along the anterior margin; ventral muscle field about 35 per cent of valve length. Cardinal process weak to completely absent. Dorsal median ridge low and broad, extending anteriorly to mid-length.|