Figure 16.10   Evolution of the ray-fi nned bony fi shes: (a) the Carboniferous palaeonisciform Cheirodus, a deep-bodied form; (b) the Triassic “holostean” Semionotus; (c) the Cretaceous teleost Mcconichthys; (d) evolution of actinopterygian jaws from the simple hinge of a palaeonisciform (left) to the more complex jaws of a holostean (middle) and the fully pouting jaws of a teleost (right). (a, b, based on Moy-Thomas & Miles 1971; c, based on Grande 1988; d, based on Alexander 1975.)

← Back