|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Orthida - Orthidae
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.
|A. Williams 1962||Subrectangular, unequally biconvex Taphrorthis with a more convex, slightly carinate pedicle valve about three-quarters as long and just less than one-quarter as deep as wide and a gently convex sulcate brachial valve; interareas short, curved, subequal; ornamentation costellate in two generations and numbering about 10 per 5 rnm. at the antero-median margins of adult shells; ventral muscle-scar subquadrate, extending anteriorly for about one-quarter the length of the pedicle valve, vascula media slightly divergent.|