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Found 6 results

  1. Reconstruction of trilobite ancestral range in the southern hemisphere January 10, 2019, FAPESP https://phys.org/news/2019-01-reconstruction-trilobite-ancestral-range-southern.html http://agencia.fapesp.br/reconstruction-of-trilobite-ancestral-range/29527/ Carbonaro, F.A., Langer, M.C., Nihei, S.S., de Souza Ferreira, G. and Ghilardi, R.P., 2018. Inferring ancestral range reconstruction based on trilobite records: a study-case on Metacryphaeus (Phacopida, Calmoniidae). Scientific reports, 8(1), p.15179. https://www.researchgate.net/publication/328251419_Inferring_ancestral_range_reconstruction_based_on_trilobite_records_a_study-case_on_Metacryphaeus_Phacopida_Calmoniidae https://www.nature.com/articles/s41598-018-33517-5 Bolivian Trilobites - At The Top Of The World American Museum of Natural History https://www.amnh.org/our-research/paleontology/paleontology-faq/trilobite-website/trilobite-localities/bolivian-trilobites-at-the-top-of-the-world Gallery of the Devonian Trilobites of Bolivia https://www.amnh.org/our-research/paleontology/paleontology-faq/trilobite-website/trilobite-localities/bolivian-trilobites-at-the-top-of-the-world/gallery-of-the-devonian-trilobites-of-bolivia Yours, Paul H.
  2. Trilobite question

    Bought this trilobite many yrs. ago there was no info on it at all but the eyes were so great I had to have it, I am pretty sure its a Order Phacopida but that's as far as I have gone. Family, Genus and species have a dead end in my searching, Not a super piece and am sure some it is missing some of the front of the cephalon which adds to the ID but would like to display it with correct ID. Any help would be appreciated.
  3. Gift trilobite

    Hopefully we'll have better luck with this one than my last post This is a trilobite which I was given as a Christmas gift many years ago. I haven't the slightest idea where it may have come from, but I think it may be from the order Phacopida. If anyone can tell what it is as well as where/when it could be from I would greatly appreciate it! More pictures:
  4. It's been awhile since I've made a post, I've been super busy in my junior year now and have been working quite a lot on my fossil project that will become my senior thesis! Anyway, today while examining my sphaerexochus specimens, I came across one which looks very different from the rest. From my research thus far it appears to be a Pseudosphaerexochus of some sort. What do you guys think? PART 1: Pseudosphaerexochus? Dorsal view of specimen Rotated Side view, Notice the prominent S2 furrow. None of my sphaerexochus specimens have this Pseudosphaerexochus? specimen (left) vs. one of my larger Sphaerexochus romingeri specimens. PART 2- Unidentified cheirurid pygidia In the process of counting and recording all the Silurian specimens for this project, I came across two pygidia I could not initially identify. I went to my guide to the fossils of Indiana reference book and found a picture that looks identical to the specimens in question. The book says they are Cheirurus niagarensis pygidia, so of course I was satisfied with this ID since I happen to have about a dozen C. niagarensis cephalons in my collection. However, upon further research, I have found that the pygidia specimens I have collected as well as the one mentioned in my reference book more closely resemble Sphaerexochus pygidia. Here are two pics showing both of my specimens. Here is the top specimen from the above pictures with the contrast enhanced Here is the picture from my reference book that is identified as a Cheirurus niagarensis pygidium And here is just one of many pictures I have found showing Sphaerexochus pygidia that resemble both my specimens and the one from my reference book Both Cheirurus and Sphaerexochus belong to the family Cheiruridae, so it makes sense that they might have very similar looking pygidia. However, I have yet to find any pictures (online or in text) that show a cheirurus pygidium that looks similar to the ones I have found. Perhaps my reference book has an incorrect identification or I just haven't done enough research yet!
  5. Doubts on Devonian Phacopids

    Hello, I think these are a Cornuproetus plus a Reedops? Am I right? They are from Atchana. If yes, are the species known? Thanks in advance to you all. Miguel
  6. Eldredgeops rana

    From the album America

    Please DO NOT... 1) Repost this without my permission 2) Claim this as your own 3) Post it elsewhere without stating permission situation If you are planning to change this image in any way, please contact me before you do so. This image has been copyrighted. ------------------------------------------------------------------- This trilobite was given to me as a gift from a dear friend from New York. It is from the Middle Devonian of Penn Dixie, New York, USA

    © ¬©2012 ~quicksilver123

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