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Parksosaurus warreni
Taxonomy
Thescelosaurus warreni was named by Parks (1926). Its type specimen is ROM 804, a partial skeleton, and it is a 3D body fossil. Its type locality is Rumsey Ferry road (100 ft level) [ROM], which is in a Maastrichtian terrestrial sandstone in the Horseshoe Canyon Formation of Canada. It is the type species of Parksosaurus.
It was recombined as Parksosaurus warrenae by Olshevsky (1992) and Buchholz (2002); it was recombined as Parksosaurus warreni by Sternberg (1937), Sternberg (1940), Kuhn (1964), Russell (1964), Russell (1966), Russell and Chamney (1967), Lehman (1981), Weishampel and Weishampel (1983), Sues and Norman (1990), Weishampel and Heinrich (1992), Sues (1997), Eberth (1997), Eberth et al. (2001), Norman et al. (2004), Ryan and Evans (2005), Butler et al. (2008), Butler and Galton (2008), Boyd et al. (2009), Butler and Galton (2009), Butler and Sullivan (2009), Brown and Druckenmiller (2011), Han et al. (2012), Brown et al. (2013), Becerra et al. (2016), Herne et al. (2018), Bell et al. (2018), Madzia et al. (2018), Herne et al. (2019), Andrzejewski et al. (2019), Dieudonné et al. (2020) and Sues et al. (2022).
It was recombined as Parksosaurus warrenae by Olshevsky (1992) and Buchholz (2002); it was recombined as Parksosaurus warreni by Sternberg (1937), Sternberg (1940), Kuhn (1964), Russell (1964), Russell (1966), Russell and Chamney (1967), Lehman (1981), Weishampel and Weishampel (1983), Sues and Norman (1990), Weishampel and Heinrich (1992), Sues (1997), Eberth (1997), Eberth et al. (2001), Norman et al. (2004), Ryan and Evans (2005), Butler et al. (2008), Butler and Galton (2008), Boyd et al. (2009), Butler and Galton (2009), Butler and Sullivan (2009), Brown and Druckenmiller (2011), Han et al. (2012), Brown et al. (2013), Becerra et al. (2016), Herne et al. (2018), Bell et al. (2018), Madzia et al. (2018), Herne et al. (2019), Andrzejewski et al. (2019), Dieudonné et al. (2020) and Sues et al. (2022).
Synonymy list
| Year | Name and author |
|---|---|
| 1926 | Thescelosaurus warreni Parks pp. 1-5 |
| 1927 | Thescelosaurus warreni Huene p. 261 |
| 1930 | Thescelosaurus warreni Hay p. 207 |
| 1930 | Thescelosaurus warreni Russell p. 150 |
| 1933 | Thescelosaurus warreni Russell p. 129 |
| 1935 | Thescelosaurus warreni Parks p. 194 |
| 1936 | Thescelosaurus warreni Swinton p. 574 |
| 1937 | Parksosaurus warreni Sternberg p. 375 |
| 1940 | Parksosaurus warreni Sternberg pp. 492-493 |
| 1964 | Parksosaurus warreni Kuhn p. 8 |
| 1964 | Parksosaurus warreni Russell p. 15 |
| 1966 | Parksosaurus warreni Russell p. 29 |
| 1967 | Parksosaurus warreni Russell and Chamney p. 12 |
| 1981 | Parksosaurus warreni Lehman p. 203 |
| 1983 | Parksosaurus warreni Weishampel and Weishampel p. 44 |
| 1990 | Parksosaurus warreni Sues and Norman p. 500 |
| 1992 | Parksosaurus warrenae Olshevsky p. 224 |
| 1992 | Parksosaurus warreni Weishampel and Heinrich p. 171 |
| 1997 | Parksosaurus warreni Eberth p. 201 |
| 1997 | Parksosaurus warreni Sues p. 357 |
| 2001 | Parksosaurus warreni Eberth et al. p. 66 |
| 2002 | Parksosaurus warrenae Buchholz p. 19 |
| 2004 | Parksosaurus warreni Norman et al. p. 395 |
| 2005 | Parksosaurus warreni Ryan and Evans p. 329 |
| 2008 | Parksosaurus warreni Butler and Galton p. 640 |
| 2008 | Parksosaurus warreni Butler et al. p. 10 |
| 2009 | Parksosaurus warreni Boyd et al. pp. 765-766 |
| 2009 | Parksosaurus warreni Butler and Galton p. 640 |
| 2009 | Parksosaurus warreni Butler and Sullivan p. 27 |
| 2011 | Parksosaurus warreni Brown and Druckenmiller p. 1347 |
| 2012 | Parksosaurus warreni Han et al. p. 1391 fig. 14 |
| 2013 | Parksosaurus warreni Brown et al. p. 504 |
| 2016 | Parksosaurus warreni Becerra et al. p. 568 |
| 2018 | Parksosaurus warreni Bell et al. p. 12 |
| 2018 | Parksosaurus warreni Herne et al. p. 15 |
| 2018 | Parksosaurus warreni Madzia et al. p. 972 |
| 2019 | Parksosaurus warreni Andrzejewski et al. p. 9 |
| 2019 | Parksosaurus warreni Herne et al. p. 573 |
| 2020 | Parksosaurus warreni Dieudonné et al. |
| 2022 | Parksosaurus warreni Sues et al. |
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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.
†Parksosaurus warreni Parks 1926
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. J. Butler et al. 2008 | A dorsoventrally broad posterolateral process of the premaxilla and a postorbital process of the jugal that expands posterodorsally. | |
| C. A. Boyd et al. 2009 | This species was diagnosed by Galton (1995) as follows: deep posterior process of premaxilla; extensive suturai contact between maxilla and nasal; small, oval antorbital fenestra; squamosal transversely wide; well-enamelled surface of cheek teeth has numerous low, rounded ridges. Further preparation and study of ROM 804 is currently underway by other authors (D. Evans pers. comm.) that will provide more information about the anatomy of this species. | |
| H.-D. Sues et al. 2022 | Diagnosed by the following combination of character-states: Premaxilla with dorsoventrally deep posterolateral process. Antorbital fenestra small and teardrop-shaped. Broad contact between maxilla and prefrontal. Lateral surface of jugal devoid of sculpturing. Orbital margin of postorbital not rugose. Lingual surfaces of dentary teeth with 9 or 10 rounded, vertical ridges terminating in apical denticles; central ridge often more pronounced than others, with small, diagonally extending accessory grooves. Scapula without acromial ridge. Suprascapula mineralized or ossified. Dorsal margin of ischium posterodorsally concave at mid-length. Greater and lesser trochanters of the femur not separated by cleft. Chevrons on proximal and mid-caudal vertebrae with greatly expanded distal ends. More distal caudal vertebrae with greatly elongated prezygapophyses and lacking postzygapophyses. |