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Please help identify Devonian trilobite


matgerke

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Found this trilobite this afternoon between Capon Bridge and Wardensville.  The formation is supposed to be Oriskany Sandstone, but it looked like siltstone not sandstone.

 

Any help on identification?  I haven't seen any with these spines in this area.

 

Thanks!

Matt

PXL_20201115_194408120.PORTRAIT-02.ORIGINAL.jpg

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Excellent find!

 

Enlarged, rotated, cropped, and contrasted:

 

PXL_20201115_194408120.PORTRAIT-02.ORIGINAL.thumb.jpg.7c26a0489a070c163122ee75b2140ba9.jpg

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Kettneraspis callicera

 

image.png.7b922e385a1a3513fcbc4aec46987075.png

 

"Locality 18 near Capon Lake, Hampshire County, WV, Needmore Fm, early to middle Devonian period...  ...south of the village of Capon Lake...  ...north of Wardensville"

 

Burns, J. 1991

Fossil Collecting in the Mid-Atlantic States with Localities, Collecting Tips, and Illustrations of more than 450 Fossil Specimens. The Johns Hopkins University Press, 200 pp.

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image.png.a84de26dad44fb03836a743755df237c.png

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Great identification, thanks for your collective wisdom!

 

My specimen looks almost exactly like the illustration; however, one aspect that looks significantly different in my specimen is that the spines are much, much longer than the Kettneraspis callicera shown in the illustration.  Is this normal within-species variation?  Is there a resource for identifying species within Kettneraspis?

 

Thanks again,

Matt

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What a fabulous little Kettie! Congratulations!

 

In terms of spine length, that may be tougher to rely on an illustration as opposed to a range of photographs of the specimens. Preservation of such long, delicate spines is not common, and so some specimens may appear to have them somewhat truncated or cut off. That being said, this delightful specimen seems a fine morphological fit for K. callicera as @piranha has indicated. It appears in equivalent strata in NY's Schoharie/Bois Blanc Fm (which overlies the Oriskany in some places; Kalkberg/New Scotland in others). 

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