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Swiss Journal of Palaeontology
Fig. 1 | Swiss Journal of Palaeontology

Fig. 1

From: An assessment of age determination in fossil fish: the case of the opercula in the Mesozoic actinopterygian Saurichthys

Fig. 1

The basal actinopterygian Saurichthys. a Unprepared skull of Saurichthys curionii (PIMUZ T 2718, mirror image) from the Lower Ladinian (Cassina Member, Meride Formation, Middle Triassic) of Monte San Giorgio, Switzerland. Note prominent oval opercula (op) in internal (top) and external (bottom) view, the latter showing strong surface ornamentation; b phylogenetic hypothesis showing the position of Saurichthys in the framework of non-teleost Actinopterygii, following Gardiner et al. (2005) and Near et al. (2013)

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