[Neoselachii] Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977
   Order Carcharhiniformes Compagno, 1973 - ground sharks
     Family Proscylliidae Fowler, 1941 - finback catsharks
       1 Genus Ctenacis L.J.V. Compagno, 1973 [monotypic]
       2 Genus Eridacnis Smith, 1913
       3 Genus Gollum L.J.V. Compagno, 1973 [monotypic]
       4 Genus Proscyllium Hilgendorf, 1904 [monotypic]