| 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. Its type is Achelousaurus horneri.
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), 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), Evans and Ryan (2015); and to Pachyrhinosaurini by Ryan et al. (2017).
Species
A. horneri (type 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: Marsh 1875, Kiessling 2004, Norman and Weishampel 1991 | |||||
Age range: Late/Upper Campanian or 83.60000 to 72.20000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | USA (Montana) | A. horneri (22652 236765) |