Reconstruction of the mysterious giant arthrodire placoderm, Dinichthys herzeri, from the Famennian Cleveland Shale fauna of Late Devonian Ohio. Reconstruction sort of based on Gorgonichthys.
Much ado has been made about Dinichthys, as it has been made into a wastebasket taxon for decades before it was synonymized into Dunkleosteus (with whom it has been confused for over a century).
Recent research has determined that it is a unique species very distinct from Dunkleosteus (being on separate branches in Arthrodira). Though, so far, it is now only known by the holotype specimens of portions of a ferociously pronged lower jaw.