In 2014, Martill suggested that the odontoid at the tip of the lower jaw of Istiodactylus served to fill the space where no tooth was present. This completed an arc-like bite that would have been necessary to sever morsels that would otherwise remain attached by a thread.
In 2014, Martill indicated that the odontoid at the tip of Istiodactylus's lower jaw filled the space where no tooth existed. This completed an arc-shaped bite necessary for tearing apart food fragments that would otherwise be stuck together.