|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Helcionelloida - Helcionellida - Rugaeconidae
It was recombined as Oelandia comma by Peel and Yochelson (1987) and Skovsted (2004); it was recombined as Trenella comma by Parkhaev (2002); it was recombined as Dorispira comma by Parkhaev and Demidenko (2010) and Wagner (2017).
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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.