[Neoselachii] Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977 Order Carcharhiniformes Compagno, 1973 - ground sharks Family Proscylliidae Fowler, 1941 - finback catsharks Genus Proscyllium Hilgendorf, 1904 [monotypic] Proscyllium habereri Hilgendorf, 1904 - graceful catshark