Figures

Figure 16.1   Early jawless fi shes: (a) Sacabambaspis from the Mid Ordovician of Brazil, the oldest well-preserved fi sh; (b) the osteostracan Hemicyclaspis from the Devonian; and (c) the heterostracan Pteraspis, also from the Devonian. (a, b, based on Gagnier 1993; c, based on Moy-Thomas & Miles 1971.)

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