Styloichthys as the oldest coelacanth: Implications for early osteichthyan interrelationships

The Early Devonian (Lochkovian) sarcopterygian fish Styloichthys has been interpreted as the immediate sister taxon of the clade comprising both the dipnoan and the tetrapod total groups, but support for this placement is weak. Many derived characters of the lower jaw, braincase and dermal skull ali...