|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||Small, nearly equidimensional shell with two very strong ventral ribs flanked by weak lateral ribs, small, ventral anterior fold; mediodorsal spiralia with ~4-5 revolutions.|