An unusual microsite from the Upper Cretaceous Horseshoe Canyon Formation of Alberta, CanadaCitation for this article: Whitebone, S. A., Funston, G. F., & Currie, P. J. (2024) An unusual microsite from the Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada. Journal of Vertebrate Paleontology . https://doi.org/10.1080/02724634.2024.2316668 DOI
S. Amber Whitebone, Gregory F. Funston, Philip J. Currie

et al.

Journal of Vertebrate Paleontology, Journal Year: 2023, Volume and Issue: 43(5)

Published: Sept. 3, 2023

The Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada, is among the best-studied paleoecosystems in North America. However, its microvertebrate paleocommunity structure relatively poorly known, partly because it lacks abundant microsites other deposits Alberta. An unusual microsite (FTS-2) from Horsethief Member described that produces anuran and troodontid material, alongside perinatal material ornithischians tyrannosaurs. Anuran specimens representing a minimum two separate taxa metatherian molar suggest these components fauna were more diverse than currently recognized. assemblage similar to three American sites produce teeth dinosaurs. environmental taphonomic conditions vary, supporting notion mixed biotic abiotic factors driving association troodontids perinates. In part, this may stem nesting preferences between dinosaurs, as collected all suggests proximity sites. Sites such FTS-2 are important for revealing rare small paleoecosystems, hold promise interactions parts fauna.

Language: Английский

Osteohistological analysis of metatarsals reveals new information on pathology and life history of troodontids from the Campanian Dinosaur Park Formation, Alberta, Canada DOI Creative Commons
Christiana Garros, Mark J. Powers, Aaron D. Dyer

et al.

Journal of Anatomy, Journal Year: 2025, Volume and Issue: unknown

Published: April 19, 2025

Abstract Troodontidae is a family of small‐bodied theropods known predominantly from Asia but are comparatively scarce in North America. In the Dinosaur Park Formation (DPF) Alberta, Canada, they isolated material, precluding taxonomic and ontogenetic precision for this clade. Previously never sampled histologically within DPF, here we attempt to fill gaps our knowledge about life histories clade formation by surveying metatarsals, which among most abundant identifiable troodontid elements DPF. We 11 metatarsals (three metatarsal IIs, three IIIs five IVs) varying sizes included pathological individuals describe microanatomy both healthy determine status each element graph their pattern growth. Osteohistology reveals that grew remodelled asymmetrically cortex, ceasing growth remodelling primarily along articular surfaces entheses. Pathological ranged displaying features response localised stress (chronic callus avulsion/chip fracture) extreme modification trauma inflammation at distal joint. Only latter appeared be related overall growth, suggesting condition either developed early stunted or another underlying cause was responsible resulting observed. Overall, tracking specimens there least two trajectories DPF differentiated timing major spurts plateaus. Whether represents sexual dimorphism, diversity, form variation warrants further investigation.

Language: Английский

Citations

0
Jaw biomechanics of Troodontidae and their implications for the palaeobiology of this lineage of bird-like theropod dinosaurs DOI Creative Commons
Chan‐gyu Yun

Lethaia, Journal Year: 2025, Volume and Issue: 58(1), P. 1 - 12

Published: Feb. 20, 2025

Language: Английский

Citations

0
An unusual microsite from the Upper Cretaceous Horseshoe Canyon Formation of Alberta, CanadaCitation for this article: Whitebone, S. A., Funston, G. F., & Currie, P. J. (2024) An unusual microsite from the Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada. Journal of Vertebrate Paleontology . https://doi.org/10.1080/02724634.2024.2316668 DOI
S. Amber Whitebone, Gregory F. Funston, Philip J. Currie

et al.

Journal of Vertebrate Paleontology, Journal Year: 2023, Volume and Issue: 43(5)

Published: Sept. 3, 2023

The Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada, is among the best-studied paleoecosystems in North America. However, its microvertebrate paleocommunity structure relatively poorly known, partly because it lacks abundant microsites other deposits Alberta. An unusual microsite (FTS-2) from Horsethief Member described that produces anuran and troodontid material, alongside perinatal material ornithischians tyrannosaurs. Anuran specimens representing a minimum two separate taxa metatherian molar suggest these components fauna were more diverse than currently recognized. assemblage similar to three American sites produce teeth dinosaurs. environmental taphonomic conditions vary, supporting notion mixed biotic abiotic factors driving association troodontids perinates. In part, this may stem nesting preferences between dinosaurs, as collected all suggests proximity sites. Sites such FTS-2 are important for revealing rare small paleoecosystems, hold promise interactions parts fauna.

Language: Английский

Citations

0