Platycephalichthys is a genus of tristichopterid lobe-finned fish which lived during the Upper Devonian, Frasnian stage.

Below is a cladogram from Swartz, 2012:[1] Kenichthys Rhizodontidae Canowindridae Megalichthyiformes Tristichopteridae Tinirau Platycephalichthys Panderichthys Tiktaalik Elpistostege Tetrapoda

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