|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Cephalopoda - Pseudorthocerida - Spyroceratidae
It was synonymized subjectively with Pseudorthoceratidae by Flower (1962); it was reranked as the subfamily Spyroceratinae by Sweet (1964).
It was assigned to Cephalopoda by Ulrich et al. (1944); to Pseudorthoceratidae by Sweet (1964); to Orthocerida by Niko et al. (2000); and to Pseudorthocerida by Kröger (2008).
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.