Cover image: A frilled lizard from Australia (Chlamydosaurus kingii) in a defensive posture. This nicely illustrates one of the many selective pressures acting on the cranial system in vertebrates. Submitted by Anthony Herrel, Vicky Schaerlaeken, Jay J. Meyers, Keith A. Metzger, and Callum F. Ross, "The evolution of cranial design and performance in squamates: consequences of skull bone reduction on feeding behavior."
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