Opinions from M. J. Johns 1997
- 'Acrodontidae belongs to Hybodontoidea'
- 'Acrodus belongs to Acrodontidae'
- 'Carinasubcorona belongs to Elasmobranchii'
- 'Carinasubcorona subradiciplana belongs to Carinasubcorona'
- 'Complanicorona belongs to Elasmobranchii'
- 'Complanicorona glabra belongs to Complanicorona'
- 'Complanicorona rugosimargines belongs to Complanicorona'
- 'Complanicorona subrugosa belongs to Complanicorona'
- 'Coniunctio belongs to Elasmobranchii'
- 'Coniunctio aequirugosa belongs to Coniunctio'
- 'Coniunctio multirugosa belongs to Coniunctio'
- 'Duplisuggestus belongs to Elasmobranchii'
- 'Duplisuggestus duplirugosus belongs to Duplisuggestus'
- 'Duplisuggestus profundisulcus belongs to Duplisuggestus'
- 'Elasmobranchii belongs to Chondrichthyes'
- 'Fragilicorona belongs to Elasmobranchii'
- 'Fragilicorona brevirostrum belongs to Fragilicorona'
- 'Fragilicorona labribrevirostrum belongs to Fragilicorona'
- 'Fragilicorona labritricuspis belongs to Fragilicorona'
- 'Fragilicorona tricuspis belongs to Fragilicorona'
- 'Fragilicorona unicuspis belongs to Fragilicorona'
- 'Glabrisubcorona belongs to Elasmobranchii'
- 'Glabrisubcorona tendibasis belongs to Glabrisubcorona'
- 'Glabrisubcorona vadosidevexa belongs to Glabrisubcorona'
- 'Gracilisuggestus belongs to Elasmobranchii'
- 'Gracilisuggestus triapices belongs to Gracilisuggestus'
- 'Gracilisuggestus uniapex belongs to Gracilisuggestus'
- 'Hybodontoidea belongs to Euselachii'
- 'Labascicorona belongs to Elasmobranchii'
- 'Labascicorona alata belongs to Labascicorona'
- 'Labascicorona longifossae belongs to Labascicorona'
- 'Labascicorona mediflexura belongs to Labascicorona'
- 'Labascicorona nitidifastigia belongs to Labascicorona'
- 'Labascicorona trifastigia belongs to Labascicorona'
- 'Labrilancea belongs to Elasmobranchii'
- 'Labrilancea glabrisubtricuspis belongs to Labrilancea'
- 'Lobaticorona belongs to Elasmobranchii'
- 'Lobaticorona floridibasis belongs to Lobaticorona'
- 'Lobaticorona floriditabella belongs to Lobaticorona'
- 'Lobaticorona tumidibasis belongs to Lobaticorona'
- 'Lobaticorona tumiditabella belongs to Lobaticorona'
- 'Lobaticorona tumiditurris belongs to Lobaticorona'
- 'Minuticorona belongs to Elasmobranchii'
- 'Minuticorona triculmina belongs to Minuticorona'
- 'Minuticorona uniculmen belongs to Minuticorona'
- 'Ornatilabrilancea belongs to Elasmobranchii'
- 'Ornatilabrilancea circacarina belongs to Ornatilabrilancea'
- 'Ornatilabrilancea solicarina belongs to Ornatilabrilancea'
- 'Palaeospinacidae belongs to Synechodontiformes'
- 'Parvidiabolus belongs to Elasmobranchii'
- 'Parvidiabolus acutus belongs to Parvidiabolus'
- 'Parvidiabolus convexus belongs to Parvidiabolus'
- 'Parvidiabolus longisulcus belongs to Parvidiabolus'
- 'Parvidiabolus obliquus belongs to Parvidiabolus'
- 'Parviscapha belongs to Elasmobranchii'
- 'Parviscapha trivela belongs to Parviscapha'
- 'Parviscapha univelum belongs to Parviscapha'
- 'Polyacrodontidae belongs to Hybodontoidea'
- 'Polyacrodus belongs to Polyacrodontidae'
- 'Proprigalea belongs to Elasmobranchii'
- 'Proprigalea languidula belongs to Proprigalea'
- 'Proprigalea mediglabra belongs to Proprigalea'
- 'Proprigalea medirugosa belongs to Proprigalea'
- 'Rugosicorona belongs to Elasmobranchii'
- 'Rugosicorona devexa belongs to Rugosicorona'
- 'Sacrisubcorona belongs to Elasmobranchii'
- 'Sacrisubcorona submedicarina belongs to Sacrisubcorona'
- 'Squalomorphii was reranked as a superorder and belongs to Neoselachii'
- 'Suaviloquentia belongs to Elasmobranchii'
- 'Suaviloquentia brevilingua belongs to Suaviloquentia'
- 'Suaviloquentia longilingua belongs to Suaviloquentia'
- 'Suaviloquentia obliquilingua belongs to Suaviloquentia'
- 'Synechodontiformes belongs to Squalomorphii'
- 'Synechodus belongs to Palaeospinacidae'
- 'Synechodus incrementum belongs to Synechodus'
- 'Synechodus multinodosus belongs to Synechodus'
- 'Synechodus volaticus belongs to Synechodus'
- 'Undulaticorona belongs to Elasmobranchii'
- 'Undulaticorona profundifossae belongs to Undulaticorona'
- 'Undulaticorona propensa belongs to Undulaticorona'