Chronological framework and palaeoecology of Carnivora from the Linxia Basin, China

Jiangzuo, Qigao; Wang, Shiqi; Deng, Tao

doi:10.1016/j.palaeo.2023.111463

Cited by 6 publications

(3 citation statements)

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“…The open environment increases such competition and threats due to limited cover and high visibility. In Europe, Machairodus of the Vallesian often coexisted with Indarctos and amphicyonids with similar body size to that of Machairodus [ 61 – 64 ], and these species are often less abundant than Machairodus [ 11 ], but in the Dashengou Fauna of the Linxia Basin, Dinocrocuta is much more abundant than Amphimachairodus [ 26 ]. The defense for territory and life from other carnivores is an important trigger of social behaviour in Carnivora [ 65 ].…”

Section: The Origin Of Amphimachairodus From the N...mentioning

confidence: 99%

“…The cranium was listed in faunal list as Machairodus palanderi and Amphimachairodus sp. by previous authors but not formally reported or described [ 23 , 26 ]. The new cranium shows typical Amphimachairodus traits, representing the earliest member of the genus and providing a basis for investigating its peculiar morphology and adaptions.…”

Section: Introductionmentioning

confidence: 97%

“…In this study, we report a nearly complete cranium from Houshan locality, belonging to the Dashngou Fauna of the Linxia Basin (9.8–8.7 Ma), located on the northeastern border of the Tibetan Plateau [ 23 , 26 ] ( figure 1 ). The cranium was listed in faunal list as Machairodus palanderi and Amphimachairodus sp.…”

Section: Introductionmentioning

confidence: 99%

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Origin of adaptations to open environments and social behaviour in sabretoothed cats from the northeastern border of the Tibetan Plateau

et al. 2023

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The iconic sabretooth Homotherium is thought to have hunted cooperatively, but the origin of this behaviour and correlated morphological adaptations are largely unexplored. Here we report the most primitive species of Amphimachairodus ( Amphimachairodus hezhengensis sp. nov.), a member of Machairodontini basal to Homotherium , from the Linxia Basin, northeastern border of the Tibetan Plateau (9.8–8.7 Ma). The long snout, laterally oriented and posteriorly located orbit of Amphimachairodus suggest a better ability to observe the surrounding environment, rather than targeting single prey, pointing to an adaptation to the open environment or social behaviour. A pathological forepaw of Amphimachairodus provides direct evidence of partner care. Our analyses of trait evolutionary rates support that traits correlated with killing behaviour and open environment adaptation evolved prior to other traits, suggesting that changes in hunting behaviour may be the major evolutionary driver in the early evolution of the lineage. A. hezhengensis represents one of the most important transitions in the evolution of Machairodontini, leading to adaptation in open environments and contributing to their further dispersal and radiation worldwide. This rapid morphological change is likely to be correlated with increasingly arid environments caused by the rise of the Tibetan Plateau, and competition from abundant large carnivores in this area.

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