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Taxon:
Subclass †
Ornithischia
Seeley, 1887
(vertebrate)
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Hierarchy
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Entity:
[Dinosauria] (Clade)
..[†Ornithischia] (Clade)
..[†Ornithischia] (Superorder)
..[†Rileya] (Genus)
..[Saurischia] (Clade)
..[†Unicerosaurus] (Genus)
..[†Ornithischia] (Subclass)
....[†Ankylosauria] (Order)
....[†Ceratopsia] (Order)
....[†Ornithopoda] (Order)
....[†Pachycephalosauria] (Order)
....[†Stegosauria] (Order)
Concise hierarchy
(Kingdom)
Animalia
-
(Phylum)
Chordata
-
(Class)
Reptilia
Current position
Dinosauria
(Clade)
Owen 1841 [Padian & May 1993], nom. cl. inval.
Ref:
D.M. Martill & J.D. Hudson, 1991
: 246.
[indirect]
Alternative positions
†
Dinosauria
(Class)
Owen, 1841
Ref:
D. Lambert & the Diagram Group, 1991(1997)
: 57.
[invalid/synonym]
Historical positions
†
Dinosauria
(Class)
Owen, 1841
Ref:
D. Lambert & the Diagram Group, 1991(1997)
: 57.
[invalid/synonym]
©2004-2026 Universal Taxonomic Services
Last updated:
28 Aug 2026