| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Achelousaurus
Taxonomy
Achelousaurus was named by Sampson (1994). It is not extant.
It was assigned to Pachyrostra by Fiorillo and Tykoski (2012); to Centrosaurinae by Sampson (1994), Sampson (1995), Vickaryous and Ryan (1997), Dodson (1997), Horner et al. (2001), 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).
It was assigned to Pachyrostra by Fiorillo and Tykoski (2012); to Centrosaurinae by Sampson (1994), Sampson (1995), Vickaryous and Ryan (1997), Dodson (1997), Horner et al. (2001), 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
Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Achelousaurus Sampson p. 44A |
| 1995 | Achelousaurus Sampson |
| 1997 | Achelousaurus Dodson p. 476 |
| 1997 | Achelousaurus Vickaryous and Ryan p. 492 |
| 2001 | Achelousaurus Horner et al. p. 9 |
| 2004 | Achelousaurus Dodson et al. p. 495 |
| 2004 | Achelousaurus Farke p. 5 |
| 2005 | Achelousaurus Ryan and Russell pp. 1381-3 fig. 10 |
| 2007 | Achelousaurus Ryan p. 391 fig. 12 |
| 2010 | Achelousaurus Longrich p. 692 fig. 10 |
| 2010 | Achelousaurus McDonald and Horner p. 160 fig. 10.5 |
| 2010 | Achelousaurus Xu et al. p. 1634 fig. 3 |
| 2011 | Achelousaurus Farke et al. p. 699 |
| 2011 | Achelousaurus McDonald p. 9 |
| 2012 | Achelousaurus Fiorillo and Tykoski |
| 2015 | Achelousaurus Evans and Ryan |
| 2017 | Achelousaurus Ryan et al. p. 9 |
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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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Norman and Weishampel 1991, Marsh 1875 | |||||
Age range: base of the Late/Upper Campanian to the top of the Campanian or 83.50000 to 72.10000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Campanian | USA (Montana) | A. horneri (22652) | |
| Late/Upper Campanian | USA (Montana) | A. horneri (52435) |