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- W2765729542 abstract "Abstract At 50 kg in estimated weight, the extinct Siamogale melilutra is larger than all living otters, and ranks among the largest fossil otters. The biomechanical capability of S . melilutra jaws as related to their large size is unknown but crucial to reconstructing the species’ potentially unique ecological niche. Here we compare the mandibular biomechanics of S . melilutra using engineering-based performance measures against ten extant otter biomechanical models. Despite a wide range of feeding preferences from durophagy to piscivory, living otter species exhibit a linear relationship between mandible stiffness and volume, as expected in isometric model scaling. In contrast, S . melilutra models exhibit a six-fold increase in stiffness from expected stiffness-volume relationships calculated from extant species models. Unlike stiffness, mechanical efficiency of biting is conserved among living otters and in S . melilutra . These findings indicate that although similar to living bunodont otters in morphology and biting efficiency, jaw strength in S . melilutra far surpasses molluscivores such as sea otters and Cape clawless otters, even after accounting for size. Therefore, Siamogale represents a feeding ecomorphology with no living analog, and its giant size and high mandibular strength confer shell-crushing capability matched only by other extinct molluscivores such as the marine bear Kolponomos ." @default.
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- W2765729542 date "2017-11-09" @default.
- W2765729542 modified "2023-09-26" @default.
- W2765729542 title "Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae" @default.
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- W2765729542 doi "https://doi.org/10.1038/s41598-017-15391-9" @default.
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