|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Chondrichthyes - Symmoriiformes
It was synonymized subjectively with Cladodontida by Lund (1986); it was corrected as Symmoriiformes by Maisey (2008), Ginter et al. (2010) and Ivanov et al. (2013).
It was assigned to Cladoselachii by Goto et al. (1988); to Elasmobranchii by Zangerl (1981), Williams (1985) and Williams (1998); to Chondrichthyes by Coates and Sequeira (2001), Sepkoski (2002) and Maisey (2008); and to Cladodontomorphi by Ginter et al. (2010) and Ivanov et al. (2013).
|Year||Name and author|
|1981||Symmoriida Zangerl p. 68|
|1985||Symmoriida Williams p. 88|
|1988||Symmoriida Goto et al. p. 292|
|1998||Symmoriida Williams p. 251|
|2001||Symmoriida Coates and Sequeira|
|2002||Symmoriida Sepkoski, Jr.|
|2008||Symmoriiformes Maisey p. 186|
|2010||Symmoriiformes Ginter et al. p. 59|
|2013||Symmoriiformes Ivanov et al.|
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