The following classification is somewhat
more conservative than the arrangement recently proposed by von Huene.
ORDER SAURISCHIA Seeley.
Suborder _Coelurosauria_ von Huene
(=Compsognatha Huxley, Symphypoda Cope.)
Fam. Podokesauridae Triassic, Connecticut.
" Hallopodidae Jurassic, Colorado.
" Coeluridae Jurassic and Comanchic, North America.
" Compsognathidae Jurassic, Europe.
Suborder _Pachypodosauria_ von Huene.
Fam. Anchisauridae Triassic, North America and Europe.
" Zanclodontidae }
" Plateosauridae } Triassic, Europe.*
Suborder _Theropoda_ Marsh (=Goniopoda Cope)
Fam. Megalosauridae Jurassic and Comanchic.
" Deinodontidae Cretacic.
" Ornithomimidae Cretacic, North America.
Suborder _Sauropoda_ Marsh
(=Opisthocoelia Owen, Cetiosauria Seeley.)
Fam. Cetiosauridae }
" Morosauridae } Jurassic and Comanchic.
" Diplodocidae }
Order ORNITHISCHIA Seeley
(=Orthopoda Cope, Predentata Marsh.)
Suborder _Ornithopoda_ Marsh (Iguanodontia Dollo)
Fam. Nanosauridae Jurassic, Colorado.
" Camptosauridae }
" Iguanodontidae } Jurassic and Comanchic.
" Trachodontidae (=Hadrosauridae), Cretacic.
Suborder _Stegosauria_ Marsh.
Fam. Scelidosauridae } Jurassic and Comanchic.
" Stegosauridae }
" Ankylosauridae (=Nodosauridae), Cretacic.
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