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Rubeosaurus ovatus
Taxonomy
Styracosaurus ovatus was named by Gilmore (1930). Its type specimen is USNM 11869, a skull, and it is a 3D body fossil. Its type locality is S. ovatus type, Milk River (USNM 11869), which is in a Campanian terrestrial horizon in the Two Medicine Formation of Montana. It is the type species of Rubeosaurus.
It was considered a nomen dubium by Dodson et al. (2004); it was recombined as Rubeosaurus ovatus by McDonald and Horner (2010), McDonald (2011) and Farke et al. (2011).
It was considered a nomen dubium by Dodson et al. (2004); it was recombined as Rubeosaurus ovatus by McDonald and Horner (2010), McDonald (2011) and Farke et al. (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Styracosaurus ovatus Gilmore |
| 1933 | Styracosaurus ovatus Lull p. 90 |
| 1937 | Styracosaurus ovatus Brown and Schlaikjer p. 10 |
| 1964 | Styracosaurus ovatus Kuhn p. 58 |
| 1990 | Styracosaurus ovatus Dodson and Currie p. 611 |
| 2001 | Styracosaurus ovatus Trexler p. 300 |
| 2007 | Styracosaurus ovatus Ryan et al. p. 949 |
| 2009 | Styracosaurus ovatus Hieronymus et al. p. 1372 fig. 1 |
| 2010 | Rubeosaurus ovatus McDonald and Horner p. 157 |
| 2011 | Rubeosaurus ovatus Farke et al. p. 698 |
| 2011 | Rubeosaurus ovatus McDonald p. 2 |
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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.
†Rubeosaurus ovatus Gilmore 1930
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. T. McDonald 2011 | Centrosaurine ceratopsid diagnosed by a single autapomorphy: medially inclined P3 spikes. Also distinguished by the following unique combination of characters: elongate, tapering nasal horncore as in Sinoceratops zhuchengensis, Centrosaurus brinkmani, Centrosaurus apertus, Styracosaurus albertensis, and Einiosaurus procurvicornis; nasal horncore erect as in Sinoceratops zhuchengensis, Centrosaurus brinkmani, Centrosaurus apertus, and Styracosaurus albertensis; short, dorsally-projecting postorbital horncore with rounded apex as in unmodified adult specimens of Styracosaurus albertensis and Einiosaurus procurvicornis; P3 spike as in adult specimens of Styracosaurus albertensis, Einiosaurus procurvicornis, Achelousaurus horneri, Pachyrhinosaurus canadensis, and Pachyrhinosaurus lakustai; P3 spike is straight as in Einiosaurus procurvicornis; P4 spike as in adult specimens of Styracosaurus albertensis; tapering P5 spike shorter than the P3 and P4 as in adult specimens of Styracosaurus albertensis. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Norman and Weishampel 1991, Marsh 1875 | |||||