|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Cephalopoda - Ammonitida - Perisphinctidae
It was reranked as Siemiradzkia (Planisphinctes) by Stephanov (1972); it was reranked as Prorsisphinctes (Planisphinctes) by Besnosov and Mitta (1993).
It was assigned to Siemiradzkia by Stephanov (1972); to Prorsisphinctes by Besnosov and Mitta (1993); to Ammonoidea by Sepkoski (2002); and to Perisphinctidae by Majidifard (2015).
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.