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Found 9 results

  1. I found this last Saturday in Brookfield, Madison County, New York. It’s pretty beat up but there are some features that can still be made out. I was wondering if it might be a bellacartwrightia rather than a greenops, which was my original thought. According to Karl A. Wilson’s Field Guide to the Devonian Fossils of New York, one way to tell the difference is the number of lenses in the eye in a vertical row. For greenops there is maximum of 6. This trilobite has 7 in some places. A picture of the eye, showing a vertical row of 7 lenses. A top view of the tr
  2. From the album: Trilobites

    Pygidium 15mm. A gift from Secret Santas Monica and Viola. Moscow Formation Windom Shale Member Smoke Creek Trilobite Bed Givetian Middle Devon Penn Dixie, Hamburg, NY, USA
  3. rew

    Bellacartwrightia

    I purchased this from Matt Heaton, who to the best of his recollection got it from Dan Cooper. It was sold as Bellacartwrightia whiteleyi, but that species apparently doesn't come from the Windom Shale.
  4. This may seem like an obvious question but I’ve always wondered what specific structural differences are present between a Greenops and a Bellacartwrightia. Any help would be appreciated!
  5. I found this small pygidium while prepping some Penn Dixie material. Not sure whether it’s Greenops or Bellacartwrightia. Any thoughts? @Fossil-Hound @DevonianDigger Hope you don’t mind the tags.
  6. Fossil-Hound

    Bellacartwrightia sp.

    Masterfully prepared by Malcolm Thornley @Malcolmt. This trilobite is one of the more uncommon species found at Penn Dixie and highly sought after within the Devonian strata of western New York. Recovered from a field dig, Bellacartwrightia sp. appears similar to G. boothi but there are subtle differences. Bellacartwrightia sp. has small bumps running down the axial lobe and a small spike towards the back of the cephalon. This particular specimen is wrapped around the rock. When it was first discovered only the pygidium was visible. Special note: This species is similar to tha
  7. Hello everyone, I kept these from fossil hunts in buffalo years ago cause I knew they were different. I read they split Greenops boothi into 4 different species with 2 variations of Greenops and 2 variations of Bellacartwrightia in 1997. I have some pieces that I’m not really sure which trilobite I’m dealing with. I just know it’s not the Greenops grabaui variety. The cephalon came from basic Wanakah shale that surrounds the “trilo beds” as I was moving blocks. The pygidiums came from the “trilo beds” of the lower Wanakah shale at the Lake Erie shore in Buffalo, New York. I only ha
  8. Kane

    Prep Help

    I thought I'd tap the seasoned experts about this one before I go ahead and do something... permanent and boneheaded. What I have here is a Bellacartwrightia I found at Penn Dixie over a week ago. The cephalon is sticking out at a not so easy angle. On the top is a nice Bella pygidium I uncovered while chipping away from the top. I have no idea if the Bella cephalon continues. It does look like I'll have to sacrifice the pygidium. I'm just unsure how I should be going about seeing if I can expose the bottom one there as it seems to sit at a strange angle though the strata.
  9. DevonianDigger

    Penn Dixie Trilobite — but which one?

    Hey guys! I took this little fella from the Penn Dixie site a few weeks ago and I had set it aside as a Greenops. But after really looking at it closely, those pygidium look awfully long, they're really not very common here, but I've heard rumors they do exist in the area—is this possibly a Bellacartwrightia? Would make for a super neat addition to my collection if it is!
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