|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Cephalaspidea - Cylichnidae
It was reranked as Bulla (Cylichna) by de Gregorio (1890).
It was assigned to Bulla by de Gregorio (1890); to Acteocinidae by Sohl (1964); to Scaphandridae by Martin (1904), Woodring (1928), Gardner (1948), MacNeil (1960), Olsson (1964) and Sohl (1964); to Cephalaspida by Sepkoski (2002); and to Cylichnidae by Todd (2001) and Wienrich and Janssen (2007).
|Year||Name and author|
|1890||Bulla (Cylichna) de Gregorio p. 168|
|1904||Cylichna Martin p. 137|
|1928||Cylichna Woodring p. 129|
|1948||Cylichna Gardner p. 279|
|1960||Cylichna MacNeil p. 127|
|1964||Cylichna Olsson p. 73|
|1964||Cylichna Sohl p. 299|
|2002||Cylichna Sepkoski, Jr.|
|2007||Cylichna Wienrich and Janssen p. 774|
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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.