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Giant stem tetrapod was apex predator in Gondwanan late Palaeozoic ice age

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Fig. 1: G. jennyae gen. et sp. nov. (F-1528).
Fig. 2: Time-calibrated phylogeny (majority-rule consensus tree) of major Palaeozoic and Triassic tetrapod lineages illustrating the relationships of G. jennyae and the evolution of body size.
Fig. 3: Palaeogeographic reconstructions of Pangea from Permian to Carboniferous with the dominant palaeoclimatic belts.
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