|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Atrypida - Lissatrypidae
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.
|P. Copper 1995||Medium-sized, biconvex to weakly dorsibicon-vex, smooth, rounded shells; anacline-hypercline area; minute, obscured apical-transapical foramen; weak to strong, narrow, U- to V-shaped fold on anterior commissure; thick shell wall; dorsomedially directed, stubby solid teeth; hinge plate thick; crural bases bulbous; crura curved and short; central jugum simple; spiralia of |