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Taxon:
Genus †
Tylosteus
Leidy, 1872, nom. oblit.
(dinosaur)
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Hierarchy
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Entity:
†Pachycephalosauridae (Family)
..†Alaskacephale (Genus)
..†Colepiocephale (Genus)
..†Goyocephale (Genus)
..†Gravitholus (Genus)
..†Hanssuesia (Genus)
..†Homalocephale (Genus)
..†Micropachycephalosaurus (Genus)
..[†Ornatotholus] (Genus)
..†Pachycephalosaurini (Tribe)
..†Prenocephale (Genus)
..[†Sphaerolotholus] (Genus)
..[†Sphaerolothus] (Genus)
..[†Sphaerotholus] (Genus)
..†Stegoceras (Genus)
..[†Stenotholus] (Genus)
..†Texacephale (Genus)
..†Tylocephale (Genus)
..†Wannanosaurus (Genus)
..[†Tylosteus] (Genus)
....[†Tylosteus ornatus] (Species)
Authorship
Original name
:
Leidy, 1872. Proc. Acad. nat. Sci. Philad., 1872, 40.
Attributes
Forgotten name (nom. oblit.) [ICZN, 1999: Art. 23.9 (not valid >1899)]
Ref:
R.M. Sullivan, 2006.
In
S.G. Lucas & R.M. Sullivan (eds.), 2006. Late Cretaceous vertebrates from the Western Interior.
New Mexico Museum of Natural History and Science Bulletin
35
: 357.
Synonyms
Accepted name (subjective)
:
†
Dracorex
(Genus)
Bakker, R. Sullivan, Porter, P. Larson & Saulsbury, 2006
Ref:
R.M. Sullivan, 2006
: 357.
In
:
†
Pachycephalosaurus
(Genus)
Brown & Schlaikjer, 1943
Ref:
D.B. Weishampel et al. (eds.), 1990
: 566.
©2004-2025 Universal Taxonomic Services
Last updated:
21 Sep 2025