|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Orthida - Chrustenoporidae
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.
|B. G. Baarli 1988||Biconvex and transverse elliptical outline with angular fold in pedicle and sulcus in dorsal valve. Coarsely subangular ribs in fascicostellate pattern. Thin, short dental plates and faintly impressed pentagonal muscle scars. Divergent vascula media. Brachiophores very short and supported by even shorter, variably directed supporting plates. Cardinal process with shaft that continues into myophore and further into median sulcus. Subcircular dorsal muscle field divided by oblique ridges.|