|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Rhynchonellata - Orthida - Linoporellidae
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.
|T. W. Amsden 1974||Biconvex shells with faint, obscure costellae. The ventral teeth are supported on dental plates that extend forward to encircle the elliptical muscle field. In the dorsal valve the expanded brachiophore bases unite with the median ridge to make a sessile cruralium. The cardinal process has a linear shaft that expands at its posterior end into a bulbous myophore. The shell substance is presumably punctate.|