PBDB Taxon

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Styracosaurus albertensis

Reptilia - Ceratopsidae

Taxonomy

Styracosaurus albertensis was named by Lambe (1913). Its type specimen is NMC 344, a skull, and it is a 3D body fossil. Its type locality is RTMP Quarry 16, Happy Jack Ferry, which is in a Campanian channel sandstone in the Dinosaur Park Formation of Canada.

Synonyms

Styracosaurus parksi was named by Brown and Schlaikjer (1937) [not AMNH 7372 as stated in ref 26153]. Its type specimen is AMNH 5372, a skeleton, and it is not a trace fossil. Its type locality is middle fork, Sand Creek (250 ft level) [AMNH], which is in a Campanian terrestrial sandstone/claystone in the Dinosaur Park Formation of Canada.

It was synonymized subjectively with Styracosaurus albertensis by Dodson and Currie (1990), Dodson et al. (2004), Ryan and Evans (2005) and Currie (2005).
Monoclonius nasicornus was named by Brown (1917). Its type specimen is AMNH 5351, a skeleton, and it is a 3D body fossil. Its type locality is RTMP Quarry 105, Sand Creek (150 ft level) [AMNH], which is in a Campanian channel sandstone in the Dinosaur Park Formation of Canada.

It was corrected as Monoclonius nasicornis by Sternberg (1918); it was synonymized subjectively with Styracosaurus albertensis by Dodson and Currie (1990), Dodson (1990) and Dodson et al. (2004); it was synonymized subjectively with Centrosaurus apertus by Ryan and Evans (2005) and Ryan and Russell (2005); it was misspelled as Monoclonius nasicornis by Parks (1921), Andrews (1923), Abel (1924), Parks (1925), Huene (1927), Hay (1930), Wiman (1930), Chakravarti (1934), Brown and Schlaikjer (1937), Brown and Schlaikjer (1940), Gray (1946), Swinton (1950), Kuhn (1964), Tatarinov (1964), Russell (1964), Swinton (1970), Drake (1980) and Eberth et al. (2001); it was recombined as Centrosaurus nasicornus by Russell (1930), Lull (1933), Russell (1940) and Currie (2005).

Synonymy list

Year	Name and author
1913	Styracosaurus albertensis Lambe p. 109 figs. Pl. 10-12
1914	Styracosaurus albertensis Brown p. 378
1914	Styracosaurus albertensis Lambe p. 294
1915	Styracosaurus albertensis Lambe p. 18
1916	Styracosaurus albertensis Lambe p. 195
1917	Monoclonius nasicornus Brown p. 286 figs. Pl. 11-13
1917	Styracosaurus albertensis Sternberg pp. 206-207
1918	Monoclonius nasicornis Sternberg p. 91
1920	Styracosaurus albertensis Pompeckj p. 114
1921	Styracosaurus albertensis Gilmore p. 7
1921	Monoclonius nasicornis Parks p. 62
1923	Monoclonius nasicornus Andrews p. 1108
1924	Monoclonius nasicornus Abel p. 712
1925	Monoclonius nasicornis Parks p. 5
1925	Styracosaurus albertensis Parks p. 5
1927	Monoclonius nasicornis Huene p. 261
1927	Styracosaurus albertensis Huene p. 261
1930	Monoclonius nasicornus Hay p. 222
1930	Styracosaurus albertensis Hay p. 225
1930	Centrosaurus nasicornus Russell p. 149
1930	Styracosaurus albertensis Russell p. 149
1930	Monoclonius nasicornus Wiman p. 12
1933	Centrosaurus nasicornus Lull p. 86
1933	Styracosaurus albertensis Lull p. 87
1934	Monoclonius nasicornus Chakravarti p. 78
1937	Monoclonius nasicornus Brown and Schlaikjer
1937	Styracosaurus parksi Brown and Schlaikjer
1937	Styracosaurus albertensis Brown and Schlaikjer pp. 4-7
1939	Styracosaurus albertensis Riabinin p. 25
1940	Styracosaurus parksi Brown and Schlaikjer p. 1
1940	Monoclonius nasicornus Brown and Schlaikjer pp. 2-3 figs. 1B, 2D-F
1940	Centrosaurus nasicornus Russell p. 2
1940	Styracosaurus parksi Sternberg p. 470
1946	Monoclonius nasicornus Gray p. 797
1946	Styracosaurus albertensis Gray p. 797
1950	Monoclonius nasicornus Swinton p. 1082
1964	Monoclonius nasicornus Kuhn p. 57
1964	Styracosaurus albertensis Kuhn p. 58
1964	Styracosaurus parksi Kuhn p. 58
1964	Monoclonius nasicornus Russell p. 13
1964	Styracosaurus albertensis Russell p. 13
1964	Monoclonius nasicornis Tatarinov p. 582 fig. 638
1964	Styracosaurus albertensis Tatarinov p. 583
1966	Styracosaurus albertensis Russell p. 17
1970	Monoclonius nasicornus Swinton p. 260
1970	Styracosaurus albertensis Swinton p. 263
1975	Styracosaurus albertensis Langston p. 1584
1980	Monoclonius nasicornus Drake p. 195
1980	Styracosaurus albertensis Drake p. 197
1988	Styracosaurus parksi Dodson and Currie p. 927
1990	Styracosaurus albertensis Dodson p. 240 fig. 17.4
1990	Styracosaurus albertensis Dodson and Currie p. 611
1997	Styracosaurus albertensis Vickaryous and Ryan p. 492
2001	Centrosaurus nasicornis Eberth et al. p. 59
2001	Styracosaurus albertensis Eberth et al. p. 59
2003	Styracosaurus albertensis Ryan and Russell p. 91A
2004	Styracosaurus albertensis Dodson et al. p. 495
2005	Centrosaurus nasicornus Currie p. 4
2005	Styracosaurus albertensis Currie p. 6
2005	Styracosaurus albertensis Ryan and Evans p. 328
2006	Styracosaurus albertensis Campione and Holmes p. 1014
2006	Styracosaurus albertensis Holmes et al. p. 4
2007	Styracosaurus albertensis Ryan p. 390
2007	Styracosaurus albertensis Ryan et al. pp. 948-949
2008	Styracosaurus albertensis Currie et al. p. 84
2008	Styracosaurus albertensis Longrich p. 994
2009	Styracosaurus albertensis Hieronymus et al. p. 1372 fig. 1
2010	Styracosaurus albertensis Christiansen and Tschopp p. 168
2010	Styracosaurus albertensis Longrich p. 692 fig. 10
2010	Styracosaurus albertensis McDonald and Horner p. 159
2010	Styracosaurus albertensis Ryan et al. p. 182
2011	Styracosaurus albertensis Eberth and Evans p. 20
2011	Styracosaurus albertensis Farke p. 7
2011	Styracosaurus albertensis Farke et al. p. 693
2011	Styracosaurus albertensis Maidment and Barrett p. 3
2011	Styracosaurus albertensis McDonald p. 1
2013	Styracosaurus albertensis Holmes and Ryan p. 5
2014	Styracosaurus albertensis Evans et al. p. 201
2015	Styracosaurus albertensis Chiba et al. p. 655
2016	Styracosaurus albertensis Lund et al. p. 12

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida

Rank	Name	Author
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Genasauria
—	Cerapoda
—	Marginocephalia
—	Ceratopsia	()
family	Ceratopsidae
subfamily	Centrosaurinae
—	Centrosaurini
genus	Styracosaurus
species	albertensis

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Styracosaurus albertensis Lambe 1913

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Invalid names: Monoclonius nasicornus Brown 1917 [synonym], Styracosaurus parksi Brown and Schlaikjer 1937 [synonym]

Diagnosis

Reference	Diagnosis
B. Brown 1917 (Monoclonius nasicornus)	Skull with short face; supraorbital horns incipient, nasal horn long, straight and laterally compressed; epoccipitals large. Two inwardly directed processes on posterior end of frill; a forwardly directed process over each fontanelle. Teeth with low median carina and not more than 31 vertical rows.

Measurements

No measurements are available

Composition:

hydroxyapatiteo

Entire body:

yesg

Adult length:

10 to < 100o

Adult width:

1.0 to < 10o

Adult height:

1.0 to < 10o

Architecture:

compact or denseo

Ontogeny:

accretion, modification of partso

Grouping:

gregariouso

Environment:

terrestrialsubo

Locomotion:

actively mobileo

Life habit:

ground dwellingsubo

Diet:

herbivoresubo

Reproduction:

oviparouso

Dispersal:

direct/internalo

Dispersal 2:

mobileo

Created:

2005-08-25 05:46:14

Modified:

2005-08-25 07:46:14

Source: g = genus, subo = suborder, o = order

References: Marsh 1875, Norman and Weishampel 1991, Peczkis 1995

Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma

Collections (10 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Campanian	83.5 - 70.6	Canada (Alberta)	Monoclonius nasicornus (13339) Monoclonius sp. (35511) Styracosaurus albertensis (type locality: 52487 77259 77261 77265 77266 143007) Styracosaurus sp. (22655 59222)