Smith Woodward has observed that the decline of many groups of fishes is heralded by the tendency to assume elongate and finally eel-shaped forms, as seen independently, for example, among the declining Acanthodians or palaeozoic sharks, among the modern crossopterygian Polypterus and Calamoichthys of the Nile, in the modern dipneustan Lepidosiren and Protopterus, in the Triassic chondrostean Belonorhynchus, as well as in the bow-fin (A7nia) and the garpike (Lepidosteus). [Please select]
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Left forelimb, showing characters of both a crossopterygian fin and an amphibian foot. [Please select]
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Posteriorly, there is a short, broad expansion resembling the entepicondyle of the humerus, and even more nearly like the postaxial flanges in a crossopterygian fin. [Please select]
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In addition to this remarkable combination of crossopterygian and amphibian characters, _Hesperoherpeton_ is specialized in certain features of the skull. [Please select]
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