[Neoselachii] Compagno, 1977 - modern sharks and rays see Infraclass Elasmobranchii Bonaparte, 1838 Order Carcharhiniformes Compagno, 1973 - ground sharks Family Proscylliidae Fowler, 1941 - finback catsharks Genus Gollum Compagno, 1973 [monotypic] 1 Gollum attenuatus (Garrick, 1954) - slender smooth-hound