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Taxon:
Family †"
Chaoyoungosauridae
"
Zhao, 1983, nom. nud.
(dinosaur)
Taxa
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Hierarchy
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Entity:
[†Pachycephalosauria] (Suborder)
..[†Goyocephalia] (Infraorder)
..[†Homalocephalidae] (Family)
..[†Chaoyoungosauridae] (Family)
....[†Chaoyoungosaurus] (Genus)
....[†Xuanhuasaurus] (Genus)
Authorship
SN2000 author citation
:
(Zhao, 1983) G. Olshevsky, 1991, nom. nud.
Subsequent rank (orig. spell.)
:
Olshevsky, G. 1991.
Mesozoic Meanderings
(no. 2)
: 158 ("
emendum ex
Chaoyoungosauroidea Zhao, 1983").
Attributes
Unavailable family-group name: not based upon an available/valid generic name (nom. inval.) [ICZN, 1999: Art. 11.7.1.1]
Ref:
S.J. Brands (comp.), 1989-present.
Syst. Nat. 2000
: 6 Jun 2025.
Nomen nudum (nom. nud.) [ICZN, 1999: Arts. 12 [before 1931], 13 [after 1930], G]
Ref:
G. Olshevsky, 1991.
Mesozoic Meanderings
(no. 2)
: 158 ("
nomen nudum
").
[
new
]
Types
Type, by inheritance
:
†
Chaoyoungosaurus
(Genus)
Zhao, 1983, nom. nud.
Ref:
G. Olshevsky, 1991
: 158; 14 Aug 2026.
[
new
] [inferred]
Variants
Available name
:
†
Chaoyangsauridae
(Family)
Zhao, Cheng, & Xu, 1999
Ref:
Wikimedia, 2001-present
: Chaoyangsauridae, 5 May 2025; 6 Jun 2025.
[inferred]
©2004-2026 Universal Taxonomic Services
Last updated:
28 Aug 2026