Osteostraci

Belongs within: Craniata. Boneshells In the modern day, jawless fishes represent a very small part of the surviving fauna, represented only by the eel- or worm-like hagfishes and lampreys. In the earlier part of the Palaeozoic, however, they were a much more significant component of piscine diversity. Among the most diverse of the jawless vertebrates… Continue reading Osteostraci