Gemuendina stuertzi, ray-like Placoderm Posters The fine grained sediments in

The fine grained sediments in these lagoons produced nearly flawless remains of plant and animals which fell into or were washed into them as well as some of their natural residents

or link between prosimian and simian (anthropoid) primate lineages

where they formed the dominant component of high latitude polar forests

and four actual rib fragments in articulation with the vertebrae

with a typical size range of two to seven centimeters (1 to 3� inches)

Gemuendina stuertzi, ray-like Placoderm Posters The fine grained sediments inGemuendina 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,