Recovery of novel osteological specimens (Mammuthus) from the Mammoth Site of Hot Springs, South Dakota, USA
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Summary
This summary is machine-generated.Fossil discoveries at The Mammoth Site reveal unique foot structures in Columbian mammoths (Mammuthus columbi). These findings provide the first evidence of "predigit" sesamoids in extinct elephants, supporting their ancestral nature.
Area Of Science
- Paleontology
- Mammalogy
- Vertebrate Paleontology
Background
- The Mammoth Site in South Dakota preserves Pleistocene Columbian mammoth (Mammuthus columbi) remains.
- Over 5000 specimens have been excavated from this sinkhole locality, offering insights into extinct megafauna.
Purpose Of The Study
- To report the discovery of unique mammoth foot elements not previously documented in extinct proboscideans.
- To investigate the evolutionary significance of these structures in elephantid evolution.
Main Methods
- Excavation of fossil specimens from The Mammoth Site bonebed during the 2023 and 2024 field seasons.
- Comparative anatomical analysis with extant elephant foot structures.
Main Results
- Two unique specimens were identified: a "predigit" (distal prehallux) and a fused proximal sesamoid pair.
- These elements represent the first documented occurrence in extinct elephants, though known in extant elephants.
Conclusions
- The presence of "predigit" sesamoids in extinct mammoths supports their ancestral status in crown group elephants.
- These findings highlight the ancient adaptations of proboscidean feet for supporting large body mass.
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