|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the order Selachii by Säve-Söderbergh (1934); it was reranked as the class Selachii by Applegate (1970); it was reranked as the unranked clade Selachii by Jordan (1963) and Long (2011).
It was assigned to Plagiostomi by Gunnell (1933); to Elasmobranchii by Säve-Söderbergh (1934) and Jordan (1963); to Vertebrata by Applegate (1970); to Chondrichthyes by Sykes (1971); to Hybodontiformes by Herman (1975), Case (1978) and Case (1979); to Elasmobranchii by Case (1904), Eastman (1904), Andrews (1906), Fedorowski (1912), Woodward (1916), Thurmond and Jones (1981), Kumar and Loyal (1987) and Case and Schwimmer (1988); and to Neoselachii by Long (2011).
|Year||Name and author|
|1904||Selachii Case p. 74|
|1904||Selachii Eastman p. 71|
|1906||Selachii Andrews p. 317|
|1912||Selachii Fedorowski p. 55|
|1916||Selachii Woodward p. 3|
|1934||Selachii Säve-Söderbergh p. 17|
|1963||Selachii Jordan p. 590|
|1970||Selachii Applegate p. 393|
|1971||Selachii Sykes p. 13|
|1975||Selachii Herman p. 17|
|1978||Selachii Case p. 180|
|1979||Selachii Case p. 79|
|1981||Selachii Thurmond and Jones p. 39|
|1987||Selachii Kumar and Loyal p. 62|
|1988||Selachii Case and Schwimmer p. 291|
|2011||Selachii Long p. 242|
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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.