Smilodon fatalis siblings reveal life history in a saber-toothed cat

iScience

David C. Evans¹  Kevin L. Seymour²  Ashley R. Reynolds³ 

[1]Corresponding author

[2]Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 3B2, Canada

[3]Department of Natural History, Royal Ontario Museum, 100 Queen's Park, Toronto, ON M5S 1C6, Canada

关键词: Paleontology;    Ecology;    Biological Sciences;    Zoology;    Evolutionary Biology;    Evolutionary Ecology;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: The saber-toothed cat Smilodon fatalis is known predominantly from “predator trap” deposits, which has made many aspects of its life history difficult to infer. Here, we describe an association of at least two subadult and one adult S. fatalis from Pleistocene coastal deposits in Ecuador. The assemblage likely derived from a catastrophic mass mortality event, and thereby provides insights into the behavior of the species. The presence of a P3 in the subadult dentaries suggests inheritance, a rare instance of familial relatedness in the fossil record. The siblings were at least two years old and were associated with an adult that was likely their mother, indicating prolonged parental care in S. fatalis. Comparison with the growth of pantherine cats suggests that S. fatalis had a unique growth strategy among big cats that combines a growth rate that is similar to a tiger and the extended growth period of a lion.

【 授权许可】

Unknown