Order Ornithischia SEELEY 1888 1
Suborder Ornithopoda MARSH 1871 5
Family Pisanosauridae CASAMIQUELA 1967 7
Family Heterodontosauridae KUHN 1966 7
Family Hypsilophodontidae DOLLO 1882 9
Family Iguanodontidae COPE 1869 13
Family Hadrosauridae COPE 1869 20
Subfamily Hadrosaurinae LAMBE 1918 22
Subfamily Saurolophinae BROWN 1914 28
Subfamily Cheneosaurinae LULL & WRIGHT 1942 30
Subfamily Lambeosaurinae PARKS 1923 32
Family Psittacosauridae OSBORN 1923 37
Family Pachycephalosauridae STERNBERG 1945 39
Suborder Stegosauria (MARSH 1877, order) 42
Family Stegosauridae MARSH 1880 44
Subfamily Scelidosaurinae NOPCSA 1928 44
Subfamily Stegosaurinae NOPCSA 1917 45
Suborder Ankylosauria OSBORN 1923 52
Family Acanthopholididae NOPCSA 1902 54
Family Nodosauridae MARSH 1890 57
Suborder Ceratopsia MARSH 1890 62
Family Protoceratopsidae GRANGER & GREGORY 1923 64
Family Ceratopsidae MARSH 1888 67
Ornithischia incertae sedis 81
Bibliography 81
Index 82