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Summary
| Description |
Proposed reconfiguration of epiparietal numbering system in Chasmosaurus and related chasmosaurines. The original epiparietal numbering systems of Holmes et al. (2001; A, B) and Sampson et al. (2010, C) are reconfigured (G-I) based on comparison to stratigraphically preceding chasmosaurines c.f. Chasmosaurus russelli (CMN 2280, D), and C. belli (ROM 843, E; YPM 2016, F). Most notably, locus ep1 develops from an spindle shaped epiparietal in c.f. C. russelli (D) to an elongate and anteriorly curving ridge in C. belli (E, F). In YPM 2016 the ep1 ridge bears 3-4 anteriorly projecting processes which are here interpreted to be homologous with the anteriorly projecting processes also in this position in the stratigraphically succeeding taxa Vagaceratops (Chasmosaurus) irvinensis (G, H) and Kosmoceratops richardsoni (I). Specimens not shown to scale. |
| Date | |
| Source | https://peerj.com/articles/9251/ |
| Author | Denver W. Fowler, Elizabeth A. Freedman Fowler |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:28, 28 May 2023 | | 1,825 × 2,129 (1.46 MB) | FunkMonk | {{Information |description=Proposed reconfiguration of epiparietal numbering system in Chasmosaurus and related chasmosaurines. The original epiparietal numbering systems of Holmes et al. (2001; A, B) and Sampson et al. (2010, C) are reconfigured (G-I) based on comparison to stratigraphically preceding chasmosaurines c.f. Chasmosaurus russelli (CMN 2280, D), and C. belli (ROM 843, E; YPM 2016, F). Most notably, locus ep1 develops from an spindle shaped epiparietal in c.f. C. russelli (D) to... |
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