EurystichthysEurystichthys is an extinct genus of marine ray-finned fish from the Late Jurassic.NamingIt contains a single species, E. brongniarti from the Kimmeridgian of France. The genus was coined by Whitley as a replacement for Eurystethus Sauvage, 1877, a genus name preoccupied by a stinkbug described by Mayr. Woodward suggested a potential relationship to the ichthyodectiform Thrissops or enigmatic fish Pachythrissops, while Sepkoski tentatively placed it in the Pachycormiformes.