|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Sinuopeidae
It was assigned to Ophiletinae by Knight et al. (1960); to Ophiletidae by Morris and Cleevely (1981); to Sinuopeidae by Wagner (1999); and to Archaeogastropoda by Sepkoski (2002).
|Year||Name and author|
|1931||Dirhachopea Ulrich et al.|
|1931||Rhachopea Ulrich et al.|
|1960||Dirhachopea Knight et al. p. 200|
|1960||Schizopea Knight et al. p. 200|
|1981||Dirhachopea Morris and Cleevely|
|1981||Schizopea Morris and Cleevely|
|1999||Schizopea Wagner p. 70|
|2002||Dirhachopea Sepkoski, Jr.|
|2002||Schizopea Sepkoski, Jr.|
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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.