PBDB Taxon

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

Parksosaurus

Reptilia - Thescelosauridae

Taxonomy

Parksosaurus was named by Sternberg (1937). Its type is Thescelosaurus warreni. It is the type genus of Parksosauridae.

It was synonymized subjectively with Thescelosaurus by Tatarinov (1964).

It was assigned to Hypsilophodontinae by Sternberg (1940); to Dryosauridae by Milner and Norman (1984); to Thescelosauridae by Eberth (1997); to Euornithopoda by Norman et al. (2004); to Neornithischia by Boyd et al. (2009); to Hypsilophodontidae by Romer (1956), Parsch (1963), Kuhn (1964), Romer (1966), Russell and Chamney (1967), Thulborn (1970), Thulborn (1971), Galton (1972), Galton (1973), Thulborn (1974), Galton (1974), Sues (1980), Lehman (1981), Colbert (1981), Weishampel and Weishampel (1983), Norman (1984), Russell (1984), Sereno (1986), Carroll (1988), Sues and Norman (1990), Weishampel and Heinrich (1992), Carpenter (1994), Galton (1995), Sues (1997), Winkler et al. (1997), Eberth et al. (2001), Ryan and Evans (2005), Alifanov and Saveliev (2014); to Ornithopoda by Butler et al. (2008), Han et al. (2012), Herne et al. (2019); to Parksosauridae by Buchholz (2002), Dieudonné et al. (2020); and to Thescelosaurinae by Brown and Druckenmiller (2011), Brown et al. (2013), Madzia et al. (2018), Sues et al. (2022).

Species

P. warreni

Synonymy list

Year	Name and author
1937	Parksosaurus Sternberg p. 375
1940	Parksosaurus Sternberg p. 493
1956	Parksosaurus Romer p. 628
1963	Parksosaurus Parsch p. 8
1964	Parksosaurus Kuhn p. 8
1966	Parksosaurus Romer p. 370
1967	Parksosaurus Russell and Chamney p. 12
1970	Parksosaurus Thulborn p. 428 fig. 9
1971	Parksosaurus Thulborn p. 77
1972	Parksosaurus Galton p. 465
1973	Parksosaurus Galton p. 17
1974	Parksosaurus Galton p. 1064
1974	Parksosaurus Thulborn p. 171
1980	Parksosaurus Sues p. 70
1981	Parksosaurus Colbert p. 50
1981	Parksosaurus Lehman p. 203
1983	Parksosaurus Weishampel and Weishampel p. 44
1984	Parksosaurus Milner and Norman p. 146
1984	Parksosaurus Norman pp. 342-344 fig. 7
1984	Parksosaurus Russell p. 26
1986	Parksosaurus Sereno
1988	Parksosaurus Carroll
1990	Parksosaurus Sues and Norman p. 500
1992	Parksosaurus Weishampel and Heinrich p. 163
1994	Parksosaurus Carpenter p. 290
1995	Parksosaurus Galton pp. 307-308
1997	Parksosaurus Eberth p. 202
1997	Parksosaurus Sues p. 357
1997	Parksosaurus Winkler et al. p. 345 fig. 19
2001	Parksosaurus Eberth et al. p. 66
2002	Parksosaurus Buchholz p. 22
2004	Parksosaurus Norman et al. p. 395
2005	Parksosaurus Ryan and Evans p. 329
2008	Parksosaurus Butler et al. p. 21 figs. 2-4
2009	Parksosaurus Boyd et al. p. 765
2011	Parksosaurus Brown and Druckenmiller p. 1344
2012	Parksosaurus Han et al. p. 1391 fig. 14
2013	Parksosaurus Brown et al. p. 512
2014	Parksosaurus Alifanov and Saveliev p. 419
2018	Parksosaurus Madzia et al. p. 973 fig. 4
2019	Parksosaurus Herne et al. p. 573
2020	Parksosaurus Dieudonné et al.
2022	Parksosaurus Sues et al.

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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

Rank	Name	Author
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Neornithischia	()
family	Thescelosauridae
subfamily	Thescelosaurinae
genus	Parksosaurus

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. †Parksosaurus Sternberg 1937

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†Parksosaurus warreni Parks 1926

Diagnosis

Reference	Diagnosis
C. A. Boyd et al. 2009	As for type and only known species.

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:

100 kgg

Minimum body mass:

30 kgg

Architecture:

compact or denseo

Ontogeny:

accretion, modification of partso

Grouping:

gregariouso

Environment:

terrestrialo

Locomotion:

actively mobileo

Life habit:

ground dwellingo

Diet:

herbivoreo

Reproduction:

oviparouso

Dispersal:

direct/internalo

Dispersal 2:

mobileo

Created:

2005-08-25 05:59:40

Modified:

2005-08-25 07:59:40

Source: g = genus, o = order

References: Marsh 1875, Peczkis 1995

Age range: Early/Lower Maastrichtian or 72.20000 to 66.00000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Maastrichtian	72.2 - 66.0	Canada (Alberta)	P. warreni (135741 224151) Thescelosaurus warreni (48624)