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about 113 to 97
with a typical size range of two to seven centimeters (1 to 3� inches)
this specimen has the best preserved head
powerful jaws
Gemuendina stuertzi, ray-like Placoderm Posters about 113 to 97Gemuendina 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,
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