Chordata Bateson, 1885 - chordates Class Elasmobranchii Bonaparte, 1838 see Infraclass Elasmobranchii Bonaparte, 1838 Subclass Selachii see Division Selachii Order Tectospondyli Suborder Squatinoidei Berg, 1940 [monotypic] see Order Squatiniformes Buen, 1926 Family Squatinidae Blainville, 1816 - angel sharks