| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Stenonychosaurus inequalis
Taxonomy
Stenonychosaurus inequalis was named by Sternberg (1932). Its type specimen is NMC 8539 and is a 3D body fossil. Its type locality is 1.5 miles southwest of mouth, Berry Creek, which is in a Campanian terrestrial horizon in the Dinosaur Park Formation of Canada.
It was recombined as Saurornithoides inequalis by Carpenter (1982); it was synonymized subjectively with Troodon formosus by Currie (1987), Paul (1988), Currie et al. (1990), Currie (1992), Varricchio (1997), Peng et al. (2001), Makovicky and Norell (2004), Currie (2005), Norell et al. (2009); it was recombined as Troodon inequalis by Longrich (2008), Zanno et al. (2011), Evans et al. (2014), Evans et al. (2017).
It was recombined as Saurornithoides inequalis by Carpenter (1982); it was synonymized subjectively with Troodon formosus by Currie (1987), Paul (1988), Currie et al. (1990), Currie (1992), Varricchio (1997), Peng et al. (2001), Makovicky and Norell (2004), Currie (2005), Norell et al. (2009); it was recombined as Troodon inequalis by Longrich (2008), Zanno et al. (2011), Evans et al. (2014), Evans et al. (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1932 | Stenonychosaurus inequalis Sternberg |
| 1939 | Stenonychosaurus inequalis Kuhn p. 51 |
| 1951 | Stenonychosaurus inequalis Sternberg p. 258 |
| 1966 | Stenonychosaurus inequalis Russell p. 25 |
| 1969 | Stenonychosaurus inequalis Ostrom p. 148 |
| 1969 | Stenonychosaurus inequalis Russell p. 595 |
| 1970 | Stenonychosaurus inequalis Steel p. 44 |
| 1977 | Stenonychosaurus inequalis Sues p. 591 |
| 1978 | Stenonychosaurus inequalis Sues p. 395 |
| 1981 | Stenonychosaurus inequalis Lehman p. 203 |
| 1981 | Stenonychosaurus inequalis McIntosh p. 10 |
| 1981 | Stenonychosaurus inequalis Osmolska p. 89 |
| 1982 | Saurornithoides inequalis Carpenter p. 127 |
| 1985 | Stenonychosaurus inequalis Currie p. 1644 |
| 1985 | Stenonychosaurus inequalis Wilson and Currie p. 1813 |
| 1988 | Stenonychosaurus inequalis Rich et al. p. 1405 |
| 2008 | Troodon inequalis Longrich p. 994 |
| 2011 | Troodon inequalis Zanno et al. p. 2 |
| 2014 | Troodon inequalis Evans et al. p. 731 |
| 2017 | Troodon inequalis Evans et al. p. 814 |
| 2017 | Stenonychosaurus inequalis van der Reest and Currie p. 931 |
| 2022 | Stenonychosaurus inequalis Carr et al. |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Stenonychosaurus inequalis Sternberg 1932
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. J. Currie 1985 | Medium-sized carnivorous dinosaur, closely related to Saurornithoides of Mongolia. It differs from both Saurornithoides mongoliensis Osborn 1924, and Saurornithoides junior Barsbold 1974 in that the anterior margin of maxillary fenestra is more rounded; sculpturing on surface of nasal process of maxilla does not extend as far posteriorly; the post-temporal region is longer relative to the height of the skull; the basioccipital tubers are much more pronounced; the lateral depression of the braincase is subdibided by a single vertical ridge rather than a pair of diverging ridges; the presphenoid is more anterior in relation to the laterosphenoid; there is no sulcus or trough on the ventral surface of the braincase posrterior to the parasphenoid capsule; and the supraoccipital seems to be narrower. | |
| A. J. van der Reest and P. J. Currie 2017 | A troodontid within Troodontinae that is distinguished from other troodontids by possessing a convex anterior surface metatarsal III, and an L-shaped frontal with a flat shallowly anteroposteriorly rippled nasofrontal contact. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: f = family, o = order | |||||
| References: Holtz et al. 2000, Marsh 1875 | |||||
Age range: base of the Late/Upper Campanian to the top of the Late/Upper Maastrichtian or 83.60000 to 66.00000 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | Canada (Alberta) | Stenonychosaurus inequalis (type locality: 45753 59115 59131) Troodon formosus (46951) | |
| Middle Campanian - Late/Upper Campanian | Canada (Alberta) | Stenonychosaurus inequalis (179240 179241 179242 179243 179244 179245 179246 217170) | |
| Lancian | USA (Wyoming) | Saurornithoides inequalis (14519) | |
| Late/Upper Maastrichtian | USA (Montana) | Stenonychosaurus inequalis (142326) |