In Depth Named for the star shaped denticles that covered the body, Astraspis was an Ordovician era jawless fish similar to Arandaspis and Sacabambaspis. Astraspis also seems to have had a lateral line, a series of sensory organs that run down length of the sides of the body, as in modern fish. Further Reading - … Read more
In Depth Sacabambaspis was an early jawless fish, but one that seems to have had a lateral line. A lateral line is a series of sensory organs that allow the fish to detect the movement of other organisms around them, and is seen in modern fish. Sacabambaspis was probably similar to other jawless fish such … Read more
In Depth Arandaspis is today one of the better known Ordovician fishes, though its appearance is not what you might expect. The body of Arandaspis was long yet deep, with a single fin extending around the posterior half of the body. As such Arandaspis is not thought to have been a particularly powerful or graceful … Read more