|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Heptranchias (sevengill shark)
Chondrichthyes - Hexanchiformes - Hexanchidae
It was assigned to Hexanchiformes by Sepkoski (2002); and to Hexanchidae by Jordan (1907), Jordan and Gilbert (1919), Jordan (1963), Welton (1974), Long (1992), Long et al. (1993) and Carnevale (2007).
|Year||Name and author|
|1907||Heptranchias Jordan p. 101|
|1919||Heptranchias Jordan and Gilbert p. 20|
|1963||Heptranchias Jordan p. 597|
|1974||Heptranchias Welton p. 6|
|1992||Heptranchias Long p. 14|
|1993||Heptranchias Long et al. p. 655|
|2002||Heptranchias 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.