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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.:trilo:

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IMG_20180722_225620167.jpg

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I took the liberty of cropping and contrasting a few of your photos. 

 

 

IMG_20180722_225556119.jpg.ad8458f4384c2980e4edc2886496ccaa.jpg    IMG_20180722_225620167.jpg.758db774eb21cd8449e01c57c950ccf4.jpg

 

Maybe @piranha  will know. 

 

    Tim    -  VETERAN SHALE SPLITTER

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"In every walk with nature one receives far more than he seeks."

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hmmmm.. maybe clean it off a bit? it could clear it up so we can see better :hammer01: :trilowalk:

:trex::trilo::meg:games are fun, but finding fossil is even better!:meg::trilo::trex:

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1 hour ago, MRfossilMISTER said:

hmmmm.. maybe clean it off a bit? it could clear it up so we can see better :hammer01: :trilowalk:

Doesn't seem like there is much left there to clean. :( 

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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well it could help possibly, i cant make out much :blink:

:trex::trilo::meg:games are fun, but finding fossil is even better!:meg::trilo::trex:

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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.

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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.

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for comparison: Synphoria

 

Delo, D.M. 1940

Phacopid trilobites of North America.

Geological Society of America Special Papers, 29:1-135

 

image.thumb.png.b2a7ee25f1d3915f248006f3b84ff66a.png

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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

image.png.a84de26dad44fb03836a743755df237c.png

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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.

image.png.a84de26dad44fb03836a743755df237c.png

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