|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Rhynchonellata - Spiriferida - Hysterolitidae
It was assigned to Delthyrinae by Johnson (1966); to Delthyridinae by Johnson (1970); to Spiriferida by Sepkoski (2002); and to Hysterolitinae by Johnson (1995) and Williams et al. (2006).
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.