Felid material from the middle Early Pleistocene Haro River quarry, northern Pakistan, is described. Most of the material is referred to the Eurasian jaguar, Panthera gombaszogensis georgica, representing the first record of the jaguar in southern Asia. A systematic review of dental morphology of all living species of Pantherinae is made to provide a better background for studying the evolution of pantherine cats. A renewed dispersal scenario of the jaguar in Eurasia is provided. Panthera gombaszogensis georgica is suggested to be a distinct subspecies distributed in central, western and southern Asia during the Early Pleistocene, characterized by relatively small body size and slender dentition. The Eurasian jaguar does not possess the derived dental characters of the living jaguar Panthera onca (e.g. weak or no canine vertical groove, robust premolars), and presumably did not specialize on hard‐shelled prey, and therefore should be viewed as a distinct species from the living P. onca. Two additional felids from the Haro River Quarry, the large sabre‐toothed felid? Megantereon sp. and a small undetermined feline, are also reported. The Felidae faunal composition of southern Asia during the Early Pleistocene is generally similar to that of northern Eurasia, and the paleoenvironment is probably slightly more closed.
A central premise of bioclimatic envelope modeling is the assumption of niche conservatism. Whereas such assumptions are testable in modern populations, it is unclear whether niche conservatism holds over deeper time spans and over very large geographic ranges. Hyaenids occupied a diversity of ecological niches over time and space, and until the end-Pleistocene they occurred in Europe and most of Asia, with Asian populations of Crocuta suggested as being genetically distinct from their closest living relatives. Further, little is known regarding whether and how the dietary ecology of extinct populations of Crocuta differed from those of their extant African counterparts. Here, we use a multiproxy approach to assess an assumption of conserved dietary ecology in late Pleistocene extant spotted hyenas via finite element analysis, dental microwear texture analysis, and a novel dental macrowear method (i.e., whether teeth are minimally, moderately, or extremely worn, as defined by degree of dentin exposure) proposed here. Results from finite element simulations of the masticatory apparatus of Chinese and African Crocuta demonstrate lower skull stiffness and higher stress in the orbital region of the former when biting with carnassial teeth, suggesting that Chinese Crocuta could not process prey with the same degree of efficiency as extant Crocuta crocuta. Dental microwear texture data further support this interpretation, as Chinese Crocuta have intermediate and indistinguishable complexity values (indicative of hard-object feeding) between the extant African lion (Panthera leo) and extant hyenas (C. crocuta, Hyaena hyaena, and Parahyaena brunnea), being most similar to the omnivorous P. brunnea. The use of dental macrowear to infer dietary behavior may also be possible in extinct taxa, as evinced by dietary correlations between extant African feliforms and dental macrowear assignments. Collectively, this multiproxy analysis suggests that Chinese Crocuta may have exhibited dietary behavior distinct from that of living C. crocuta, and assumptions of niche conservatism may mask significant dietary variation in species broadly distributed in time and space.
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