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Foraminacephale brevis
Taxonomy
Stegoceras brevis was named by Lambe (1918). Its type specimen is NMC 1423 and is a 3D body fossil. Its type locality is Berry Creek east, GSC (NMC), which is in a Campanian terrestrial horizon in the Dinosaur Park Formation of Canada. It is the type species of Foraminacephale.
It was recombined as Troodon brevis by Gilmore (1924), Hay (1930), Russell (1964); it was synonymized subjectively with Troodon validus by Brown and Schlaikjer (1943); it was synonymized subjectively with Stegoceras validum by Sues and Galton (1987), Maryanska (1990), Maryanska et al. (2004), Currie (2005); it was recombined as Prenocephale brevis by Sullivan (2000), Eberth et al. (2001), Sullivan (2003), Sullivan (2006), Schott et al. (2009), Lehman (2010), Watabe et al. (2011); it was corrected as Stegoceras breve by Ryan and Evans (2005), Longrich (2008); it was recombined as Sphaerotholus brevis by Longrich et al. (2010); it was recombined as Foraminacephale brevis by Schott and Evans (2017), Evans et al. (2018), Woodruff et al. (2021), Wick and Lehman (2024).
It was recombined as Troodon brevis by Gilmore (1924), Hay (1930), Russell (1964); it was synonymized subjectively with Troodon validus by Brown and Schlaikjer (1943); it was synonymized subjectively with Stegoceras validum by Sues and Galton (1987), Maryanska (1990), Maryanska et al. (2004), Currie (2005); it was recombined as Prenocephale brevis by Sullivan (2000), Eberth et al. (2001), Sullivan (2003), Sullivan (2006), Schott et al. (2009), Lehman (2010), Watabe et al. (2011); it was corrected as Stegoceras breve by Ryan and Evans (2005), Longrich (2008); it was recombined as Sphaerotholus brevis by Longrich et al. (2010); it was recombined as Foraminacephale brevis by Schott and Evans (2017), Evans et al. (2018), Woodruff et al. (2021), Wick and Lehman (2024).
Synonymy list
| Year | Name and author |
|---|---|
| 1918 | Stegoceras brevis Lambe pp. 34-35 |
| 1924 | Troodon brevis Gilmore pp. 9-11 |
| 1930 | Troodon brevis Hay p. 207 |
| 1945 | Stegoceras brevis Sternberg pp. 536-7 |
| 1964 | Stegoceras brevis Kuhn p. 32 |
| 1964 | Troodon brevis Russell p. 12 |
| 1967 | Stegoceras brevis Charig p. 716 |
| 2000 | Prenocephale brevis Sullivan p. 184 fig. 3 |
| 2001 | Prenocephale brevis Eberth et al. p. 57 |
| 2003 | Prenocephale brevis Sullivan p. 196 |
| 2003 | Stegoceras brevis Williamson and Carr fig. 11 |
| 2005 | Stegoceras breve Ryan and Evans p. 320 |
| 2006 | Prenocephale brevis Sullivan p. 355 |
| 2008 | Stegoceras breve Longrich p. 994 |
| 2009 | Prenocephale brevis Schott et al. p. 774 |
| 2010 | Prenocephale brevis Lehman p. 791 |
| 2010 | Sphaerotholus brevis Longrich et al. p. 280 |
| 2011 | Prenocephale brevis Watabe et al. p. 490 |
| 2017 | Foraminacephale brevis Schott and Evans p. 867 |
| 2018 | Foraminacephale brevis Evans et al. p. 127 |
| 2021 | Foraminacephale brevis Woodruff et al. p. 563 |
| 2024 | Foraminacephale brevis Wick and Lehman p. 90 |
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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.
†Foraminacephale brevis Lambe 1918
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. M. Sternberg 1945 | Small form; frontoparietal mass short; dome only moderately thick, relatively far back; parietals strongly down-turned posteriorly; no horizontal shelf over occiput; dome smooth on top, pitted externally; frontals very broad and low anteriorly; face relatively flat; orbits in advance of dome. | |
| R. L. Schott and D. C. Evans 2017 | Pachycephalosaurine pachycephalosaurid characterized by the following autapomorphies: tall, smooth squamosal bar with a single row of six nodes in the primary node row and a single small corner node just ventral to node row; dorsal surface of frontoparietal and associated peripheral elements covered with small dorsoventrally orientated foramina resulting in a distinct pitted surface texture. Differs from St. validum, Hanssuesia sternbergi, and Colepiocephale lambei in the following characters: ‘down-turned’ posteromedial extension of parietal and closure of supratemporal fenestrae very early in ontogeny. Differs further from Sphaerotholus and Prenocephale in the following characters: prominent grooves on frontal between the supraorbital lobe and the frontonasal boss, and slit-like temporal chamber roof expressed in the parietal. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Marsh 1875 | |||||
Age range: Campanian or 83.60000 to 72.20000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Campanian | Canada (Alberta) | Stegoceras brevis (64649 64650 64651) | |
| Late/Upper Campanian | Canada (Alberta) | Stegoceras brevis, Stegoceras validus (type locality: 60877) |