PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Pachyrhinosaurus

Reptilia - Ceratopsidae

Taxonomy

Pachyrhinosaurus was named by Sternberg (1950). Its type is Pachyrhinosaurus canadensis. It is the type genus of Pachyrhinosaurinae.

It was assigned to Pachyrhinosauridae by Sternberg (1950), Romer (1956), Parsch (1963), Tatarinov (1964), Kuhn (1964), Kuhn (1966), Romer (1966), Charig (1967), Russell and Chamney (1967) and Laub (1979); to Pachyrhinosaurinae by Huene (1950) and Olshevsky and Ford (1994); to Ceratopsidae by Langston (1967), Langston (1968), Swinton (1970), Langston (1976), Russell (1984), Ostrom and Wellnhofer (1986), Carroll (1988), Eberth (1997) and Longrich (2008); to Pachyrostra by Fiorillo and Tykoski (2012); to Centrosaurinae by Dodson and Currie (1990), Dodson (1990), Lehman (1990), Sampson (1994), Lehman (1996), Vickaryous and Ryan (1997), Dodson (1997), Sereno (1998), Dodson et al. (2004), Farke (2004), Ryan and Russell (2005), Ryan (2007), Longrich (2010), McDonald and Horner (2010), Xu et al. (2010), McDonald (2011), Farke et al. (2011) and Evans and Ryan (2015); and to Pachyrhinosaurini by Ryan et al. (2017).

Species

P. canadensis (type species), P. lakustai, P. perotorum

Synonymy list

Year	Name and author
1950	Pachyrhinosaurus Huene p. 351
1950	Pachyrhinosaurus Sternberg pp. 109-110 figs. 5, Pl. 17-23
1956	Pachyrhinosaurus Romer p. 639
1963	Pachyrhinosaurus Parsch p. 8
1964	Pachyrhinosaurus Kuhn p. 61
1964	Pachyrhinosaurus Tatarinov p. 588
1966	Pachyrhinosaurus Kuhn p. 107
1966	Pachyrhinosaurus Romer p. 371
1967	Pachyrhinosaurus Charig p. 717
1967	Pachyrhinosaurus Langston p. 184
1967	Pachyrhinosaurus Russell and Chamney p. 11
1968	Pachyrhinosaurus Langston p. 1304
1970	Pachyrhinosaurus Swinton p. 263
1976	Pachyrhinosaurus Langston p. 126
1979	Pachyrhinosaurus Laub p. 9
1984	Pachyrhinosaurus Russell p. 25
1986	Pachyrhinosaurus Ostrom and Wellnhofer p. 116
1988	Pachyrhinosaurus Carroll
1990	Pachyrhinosaurus Dodson p. 241 fig. 17.1
1990	Pachyrhinosaurus Dodson and Currie p. 611
1990	Pachyrhinosaurus Lehman p. 212
1994	Pachyrhinosaurus Olshevsky and Ford
1994	Pachyrhinosaurus Sampson p. 44A
1996	Pachyrhinosaurus Lehman p. 506
1997	Pachyrhinosaurus Dodson p. 476
1997	Pachyrhinosaurus Eberth p. 201
1997	Pachyrhinosaurus Vickaryous and Ryan p. 492
1998	Pachyrhinosaurus Sereno p. 62
2004	Pachyrhinosaurus Dodson et al. p. 495
2004	Pachyrhinosaurus Farke p. 5
2005	Pachyrhinosaurus Ryan and Russell pp. 1381-3 fig. 10
2007	Pachyrhinosaurus Ryan p. 391 fig. 12
2008	Pachyrhinosaurus Longrich p. 994
2010	Pachyrhinosaurus Longrich p. 692 fig. 10
2010	Pachyrhinosaurus McDonald and Horner p. 160 fig. 10.5
2010	Pachyrhinosaurus Xu et al. p. 1634 fig. 3
2011	Pachyrhinosaurus Farke et al. p. 699
2011	Pachyrhinosaurus McDonald p. 9
2012	Pachyrhinosaurus Fiorillo and Tykoski
2015	Pachyrhinosaurus Evans and Ryan
2017	Pachyrhinosaurus Ryan et al. p. 9

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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
—	Pachyrhinosaurini
genus	Pachyrhinosaurus

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.

G. †Pachyrhinosaurus Sternberg 1950

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†Pachyrhinosaurus canadensis Sternberg 1950

†Pachyrhinosaurus lakustai Currie et al. 2008

†Pachyrhinosaurus perotorum Fiorillo and Tykoski 2012

Diagnosis

No diagnoses are available

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

Maximum body mass:

3000 kgg

Minimum body mass:

1000 kgg

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 05:46:29

Modified:

2005-08-25 07:46:29

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

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

Age range: base of the Maastrichtian to the top of the Early/Lower Maastrichtian or 72.10000 to 66.00000 Ma

Collections (15 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Campanian	83.5 - 70.6	Canada (Alberta)	P. sp. (22699 87125 220129)
Late/Upper Campanian - Early/Lower Maastrichtian	83.5 - 66.0	Canada (Alberta)	Ceratopsia indet. (64352) P. canadensis (52071 52072 52249) P. sp., P. canadensis (34744)
Maastrichtian	72.1 - 66.0	Canada (Northwest Territories)	Ceratopsidae indet. (52893)
Early/Lower Maastrichtian	70.6 - 66.0	Canada (Alberta)	P. canadensis (220119) P. sp. (96455 96457 161248)
Early/Lower Maastrichtian	70.6 - 66.0	USA (Alaska)	P. sp. (47787 51889)