|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Spiriferida - Spiriferidae
It was reranked as Delthyris (Spirifer) by von Buch (1831).
It was assigned to Delthyris by von Buch (1831); to Spiriferida by Sepkoski (2002); and to Spiriferinae by Campbell and Engel (1963) 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.