Kurufossils Posted July 23, 2018 Share Posted July 23, 2018 Hello everyone, I found this large trilobite pygidium today which is the largest piece of trilobite I have ever found in the area, the pygidium measuring nearly 2 inches long. Judging by the trilobits I usually find I think the area is Devonian as I have trilobits I've previously found I believe are from eldregops and greenops. The problem with this site is it's imported material from somewhere in upstate new york so I'm not 100% percent sure. Though I believe it's devonian I don't know of any species with a pygidium this size personally so would anymore with more expertise help me find an ID of what species this can belong to, I'd love to know since I can't see myself coming across another one of these in the tiny area I get to look in. Link to comment Share on other sites More sharing options...
Fossildude19 Posted July 23, 2018 Share Posted July 23, 2018 I took the liberty of cropping and contrasting a few of your photos. Maybe @piranha will know. 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...
Kurufossils Posted July 23, 2018 Author Share Posted July 23, 2018 @Fossildude19 Thank you very much! Link to comment Share on other sites More sharing options...
MRfossilMISTER Posted July 23, 2018 Share Posted July 23, 2018 hmmmm.. maybe clean it off a bit? it could clear it up so we can see better games are fun, but finding fossil is even better! Link to comment Share on other sites More sharing options...
Fossildude19 Posted July 23, 2018 Share Posted July 23, 2018 1 hour ago, MRfossilMISTER said: hmmmm.. maybe clean it off a bit? it could clear it up so we can see better Doesn't seem like there is much left there to clean. 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...
MRfossilMISTER Posted July 23, 2018 Share Posted July 23, 2018 well it could help possibly, i cant make out much games are fun, but finding fossil is even better! Link to comment Share on other sites More sharing options...
GerryK Posted July 23, 2018 Share Posted July 23, 2018 Your pygidium looks like a Dalmanitacea (superfamily) from the Lower Devonian. Two possible families are Dalmanitidae and Synphoriidae. It looks more like a Synphoriidae than a Dalmanitidae because the pygidium is wider and shorter than a Dalmanitidae. A possible genus could be Synphoria. 4 Link to comment Share on other sites More sharing options...
Kurufossils Posted July 23, 2018 Author Share Posted July 23, 2018 1 hour ago, GerryK said: Your pygidium looks like a Dalmanitacea (superfamily) from the Lower Devonian. Two possible families are Dalmanitidae and Synphoriidae. It looks more like a Synphoriidae than a Dalmanitidae because the pygidium is wider and shorter than a Dalmanitidae. A possible genus could be Synphoria. @GerryK Thank you very much for pointing me in the right direction! I was hardly able to find any images of one except for one of Synphoria stemmata stemmata, but I can see what you mean, it seems like I can safely label this as Synphoridae sp. since it'll likely be impossible to narrow down the specific species. Link to comment Share on other sites More sharing options...
piranha Posted July 23, 2018 Share Posted July 23, 2018 for comparison: Synphoria Delo, D.M. 1940 Phacopid trilobites of North America. Geological Society of America Special Papers, 29:1-135 2 Link to comment Share on other sites More sharing options...
Kurufossils Posted July 23, 2018 Author Share Posted July 23, 2018 @piranha Thank you for the excerpt! very helpful. Link to comment Share on other sites More sharing options...
piranha Posted July 23, 2018 Share Posted July 23, 2018 Glad to assist! Here are some additional papers: Lesperance, P.J. & Bourque, P.A. 1971 The Synphoriinae: An evolutionary pattern of Lower and Middle Devonian trilobites. Journal of Paleontology, 45(2):182-208 Lesperance, P.J. 1975 Stratigraphy and paleontology of the Synphoriidae (Lower and Middle Devonian dalmanitacean trilobites). Journal of Paleontology, 49(1):91-137 1 Link to comment Share on other sites More sharing options...
piranha Posted July 23, 2018 Share Posted July 23, 2018 The update from another specialist friend is dalmanitid: Q: This one is from New York. Some of the material is transported fill, so we are not certain if this is lower or middle Devonian. Is it a better fit for a dalmanitid or a synphoriid? Which genus would you assign it to? A: Based on the form of the pleural furrows and ribs it’s definitely dalmanitid, not synphoriid. Genera of these Devonian dalmanitids are in most cases based on cephalic characters so without a cephalon the genus is unfortunately indeterminate. 3 Link to comment Share on other sites More sharing options...
Kurufossils Posted July 24, 2018 Author Share Posted July 24, 2018 @piranha Thanks for the update! Link to comment Share on other sites More sharing options...
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