Kittenmittens Posted January 9, 2019 Share Posted January 9, 2019 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. Link to comment Share on other sites More sharing options...
Wolf89 Posted January 9, 2019 Share Posted January 9, 2019 Peronopsis trilobites. 1 Link to comment Share on other sites More sharing options...
Kittenmittens Posted January 9, 2019 Author Share Posted January 9, 2019 Took me longer to type the post then to get an answer. Thanks again! 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted January 9, 2019 Share Posted January 9, 2019 More likely to be Middle Cambrian, from Utah. Peronopsis interstricta has been renamed to Itagnostus interstrictus. 3 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
gigantoraptor Posted January 9, 2019 Share Posted January 9, 2019 Kettneraspis williamsi is an other trilobite species from Oklahoma. Do you have other trilobites as well? Maybe the labels got mixed up. Cool piece Link to comment Share on other sites More sharing options...
Carl Posted January 9, 2019 Share Posted January 9, 2019 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. 1 Link to comment Share on other sites More sharing options...
erose Posted January 9, 2019 Share Posted January 9, 2019 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. 1 Link to comment Share on other sites More sharing options...
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