|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Spanionematidae
It was assigned to Procerithiidae by Knight et al. (1960); to Palaeozygopleuridae by Heidelberger (2001); to Neotaenioglossa by Sepkoski (2002); to Subulitidae by Krawczyński (2002); and to Spanionematidae by Bouchet et al. (2005).
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.