"Cerapoda" redirects here. For the genus of moths, see Cerapoda (moth).
Neornithischians
Temporal range: Middle Jurassic–Late Cretaceous, 170–66 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
(possible Early Jurassic record)
Hypsilophodon skeletal mount at the Brussels Science Institute
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Clade:
Dinosauria
Clade:
†Ornithischia
Clade:
†Genasauria
Clade:
†Neornithischia Cooper, 1985
Subgroups
†Agilisaurus
†Ampelognathus
†Gongbusaurus?
†Hexinlusaurus
†Kulindadromeus
†Leallynasaura?
†Lesothosaurus?
†Minimocursor
†Nanosaurus
†Phyllodon
†Sanxiasaurus
†Xiaosaurus
†Yandusaurus
†Hypsilophodontidae
†Jeholosauridae
†Thescelosauridae
†Cerapoda Sereno, 1986
Marginocephalia
Ornithopoda
Neornithischia ("new ornithischians") is a clade of the dinosaur order Ornithischia. It is the sister group of the Thyreophora within the clade Genasauria. Neornithischians are united by having a thicker layer of asymmetrical enamel on the inside of their lower teeth. The teeth wore unevenly with chewing and developed sharp ridges that allowed neornithischians to break down tougher plant food than other dinosaurs. Neornithischians include a variety of basal forms historically known as "hypsilophodonts", including the Parksosauridae; in addition, there are derived forms classified in the groups Marginocephalia and Ornithopoda. The former includes clades Pachycephalosauria and Ceratopsia, while the latter typically includes Hypsilophodon and the more derived Iguanodontia.
Neornithischia ("new ornithischians") is a clade of the dinosaur order Ornithischia. It is the sister group of the Thyreophora within the clade Genasauria...
as paraphyletic and Nanosaurus is today considered a basal member of Neornithischia. Nanosaurus is known from material from all parts of the body, including...
; Tait, Alan M. (2019). "New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of...
taxonomic units (OTUs). All three claded together at the base of the Neornithischia, outside Thescelosauridae and Cerapoda, making it the first basal neornithischian...
ornithischian groups, and either be outside Genasauria, or on the basal stem of Neornithischia outside Cerapoda. Following the publication of the PhyloCode to provide...
by the describing authors, Kulindadromeus is a basal member of the Neornithischia, placed just above Hexinlusaurus in the evolutionary tree. It is the...
; Tait, Alan M. (2019). "New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of...
basal Ornithischia, which have also found it as the basalmost member of Neornithischia (a group that includes pachycephalosaurs, ceratopsians, and ornithopods)...
unnatural, paraphyletic group of successive off-shoots from throughout Neornithischia. Hypsilophodon in the modern view thus simply is a basal ornithopod...
; Tait, Alan M. (2019). "New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of...
; Tait, Alan M. (2019). "New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of...
; Tait, Alan M. (2019). "New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of...
; Tait, Alan M. (2019). "New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of...
group and Yandusaurus is viewed as taking an unresolved position within Neornithischia. He X., 1979, "A newly discovered ornithopod dinosaur Yandusaurus from...
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