Pay in 4 interest-free payments of $18.12 Learn more
Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
About 125 million years ago
Beaufort Series
the subject of this paper
Time period: Throughout the Pleistocene
000 pounds
Gemuendina stuertzi, ray-like Placoderm Stegosaurus About 125 million years agoGemuendina stuertzi is a placoderm of the order Rhenanida, of the seas of Early Devonian Germany. In life, Gemuendina resembled a scaly ray with an upturned head, or a large finned stargazer. G. stuertzi is often invoked as an example of convergent evolution with its flat body and huge, wing like pectoral fins it has a strong, albeit superficial similarity to rays. Unlike rays, however, both Gemuendina`s eyes and nostrils were placed atop the head,