Help with fossil from Oklahoma

[Kittenmittens]

Hello looking for help identifying what is on this plate. The label says devonian oklahoma but then gets hard to read maybe ketternopsis willrameri. Thanks in advance.

[Wolf89]

Peronopsis trilobites. 

[Kittenmittens]

Took me longer to type the post then to get an answer. Thanks again!

[Fossildude19]

More likely to be Middle Cambrian, from Utah. 

Peronopsis interstricta has been renamed to Itagnostus interstrictus.

[gigantoraptor]

Kettneraspis williamsi is an other trilobite species from Oklahoma. Do you have other trilobites as well? Maybe the labels got mixed up.

 

Cool piece

[Carl]

Agnostids, in some folks eyes, should no longer be considered trilobites:

 

From Wikipedia:

The systematic position of the order Agnostida within the class Trilobita remains uncertain, and there has been continuing debate whether they are trilobites or a stem group. The challenge to the status has focused on Agnostina partly due to the juveniles of one genus have been found with legs differing dramatically from those of adult trilobites,^[1] suggesting they are not members of the lamellipedian clade, of which trilobites are a part. Instead, the limbs of agnostids closely resemble those of stem group crustaceans, although they lack the proximal endite, which defines that group. They are likely the sister taxon to the crustacean stem lineage, and, as such, part of the clade,Crustaceomorpha. Other researchers have suggested, based on a cladistic analyses of dorsal exoskeletal features, that Eodiscina and Agnostida are closely united, and the Eodiscina descended from the trilobite order Ptychopariida.

[erose]

49 minutes ago, Carl said:

Agnostids, in some folks eyes, should no longer be considered trilobites:

 

From Wikipedia:

The systematic position of the order Agnostida within the class Trilobita remains uncertain, and there has been continuing debate whether they are trilobites or a stem group. The challenge to the status has focused on Agnostina partly due to the juveniles of one genus have been found with legs differing dramatically from those of adult trilobites,^[1] suggesting they are not members of the lamellipedian clade, of which trilobites are a part. Instead, the limbs of agnostids closely resemble those of stem group crustaceans, although they lack the proximal endite, which defines that group. They are likely the sister taxon to the crustacean stem lineage, and, as such, part of the clade,Crustaceomorpha. Other researchers have suggested, based on a cladistic analyses of dorsal exoskeletal features, that Eodiscina and Agnostida are closely united, and the Eodiscina descended from the trilobite order Ptychopariida.

OK, that was a brain full of info.  .... But really really interesting. Thanks Carl.