A primitive megalichthyid fish (Sarcopterygii, Tetrapodomorpha) from the Upper Devonian of Turkey and its biogeographical implications

The vertebrate fauna of the red sandstone of Pamucak-Sapan Dere Unit of the Upper Antalya Nappe (Frasnian?, Turkey) is reviewed on the basis of new material. The association of the phyllolepid Placolepis with the arthrodire Holonema in this fauna strongly suggests a Frasnian age or, at any rate, older than the Famennian. The unique osteolepiform sarcopterygian of this fauna is here described in detail and referred to Sengoerichthys ottoman n. gen., n. sp., which is considered as the most generalized megalichthyid known to date.