Fishes Class Elasmobranchii Bonaparte, 1838 see Infraclass Elasmobranchii Bonaparte, 1838 Order Rajiformes Berg, 1940 - skates Family Rhinobatidae Bonaparte, 1835 - guitarfishes 1 Subfamily Rhinobatinae see Family Rhinobatidae Bonaparte, 1835 2 Subfamily Rhynchobatinae see Family Rhinidae Müller & Henle, 1841 3 Subfamily Rhininae see Family Rhinidae Müller & Henle, 1841 4 Subfamily Platyrhininae - thornbacks see Family Platyrhinidae Jordan, 1923