|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Opisthobranchia - Cylichnidae
It was reranked as Bullina (Abderospira) by Dall (1895); it was reranked as Micromelo (Abderospira) by Dall (1903).
It was assigned to Bullina by Dall (1895); to Micromelo by Dall (1903); to Scaphandridae by Palmer and Brann (1966); to Cylichnidae by Dockery (1980); and to Cephalaspida by Sepkoski (2002).
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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.