35 : Ray families|Taxa named by David Starr Jordan|Dasyatidae|Hauterivian taxonomic families|Barremian taxonomic families|Aptian taxonomic families|Albian taxonomic families|Cenomanian taxonomic families|Turonian taxonomic families|Coniacian taxonomic families|Santonian taxonomic families|Campanian taxonomic families|Maastrichtian taxonomic families|Danian taxonomic families|Selandian taxonomic families|Thanetian taxonomic families|Ypresian taxonomic families|Lutetian taxonomic families|Bartonian taxonomic families|Priabonian taxonomic families|Rupelian taxonomic families|Chattian taxonomic families|Aquitanian taxonomic families|Burdigalian taxonomic families|Langhian taxonomic families|Serravallian taxonomic families|Tortonian taxonomic families|Messinian taxonomic families|Zanclean taxonomic families|Piacenzian taxonomic families|Gelasian taxonomic families|Calabrian taxonomic families|Ionian taxonomic families|Tarantian taxonomic families|Holocene taxonomic families