aek Posted September 2, 2019 Share Posted September 2, 2019 This morning I made a trip to a local spot. Wenlockian. Gravicalymene celebra, measures 4cm This one was difficult to work with, as dolostone always is. Ommokris obex cephalon, which turned out to be partial, and a small ventral calymene. The arrow points to the tongue-like protuberance which I was able to extract in one piece and glue back on, giving this trilobite a gargoylesque appearance. And last but not least, a mystery find... 10 Link to comment Share on other sites More sharing options...
piranha Posted September 2, 2019 Share Posted September 2, 2019 39 minutes ago, aek said: ...This one was difficult to work with, as dolostone always is. Ommokris obex cephalon,... ...The arrow points to the tongue-like protuberance which I was able to extract in one piece and glue back on, giving this trilobite a gargoylesque appearance. Well done putting this puzzle back together. Congrats on your continued success with some great Silurian trilobites! Here are figures of the unicorn dalmanitid from Holloway 1981: Holloway, D.J. 1981 Silurian Dalmanitacean Trilobites from North America and the Origins of the Dalmanitinae and Synphoriinae. Palaeontology, 24(4):695-731 PDF LINK 1 Link to comment Share on other sites More sharing options...
aek Posted September 2, 2019 Author Share Posted September 2, 2019 Thanks! @piranha Link to comment Share on other sites More sharing options...
Manticocerasman Posted September 2, 2019 Share Posted September 2, 2019 you are doing some great prepwork there congrats growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
Monica Posted September 2, 2019 Share Posted September 2, 2019 Wonderful trilobites!!! Congrats! Link to comment Share on other sites More sharing options...
aek Posted September 2, 2019 Author Share Posted September 2, 2019 @Monica @Manticocerasman Thanks guys! Link to comment Share on other sites More sharing options...
deutscheben Posted September 4, 2019 Share Posted September 4, 2019 Very cool! I am impressed with your prepping, I am still sitting on 4 calymene trilobites in dolomite that I haven't worked up the motivation to really try and bust out yet. Yours looks so clean, and the reassembly of the bizarre other trilobite turned out great as well. Link to comment Share on other sites More sharing options...
aek Posted September 6, 2019 Author Share Posted September 6, 2019 @deutscheben Thanks, Ben! Link to comment Share on other sites More sharing options...
aek Posted September 8, 2019 Author Share Posted September 8, 2019 Another find from this locality. I was able to very carefully reattach the eye stalk as seen below, but I'm not sure as to species ID?? @piranha hypostome Link to comment Share on other sites More sharing options...
piranha Posted September 8, 2019 Share Posted September 8, 2019 Encrinurus egani image from: AMNH text from: Holloway, D.J. 1980 Middle Silurian Trilobites from Arkansas and Oklahoma, U.S.A. Palaeontographica Abt.A, 170:1-85 1 Link to comment Share on other sites More sharing options...
Al Tahan Posted September 8, 2019 Share Posted September 8, 2019 Amazing trilobites Link to comment Share on other sites More sharing options...
Darktooth Posted September 8, 2019 Share Posted September 8, 2019 Great finds, Congratulations! I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
aek Posted September 8, 2019 Author Share Posted September 8, 2019 @piranha Thanks again! For some reason E. egani always throws me through a loop! @Al Tahan @Darktooth Thanks! Link to comment Share on other sites More sharing options...
ynot Posted September 9, 2019 Share Posted September 9, 2019 Great finds! Thanks for sharing. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
RJB Posted September 11, 2019 Share Posted September 11, 2019 Im not much of a trilobite guy but these are purty dang cool! Nice finds. RB Link to comment Share on other sites More sharing options...
aek Posted September 16, 2019 Author Share Posted September 16, 2019 @ynot @RJB Thanks! An additional find from this spot (which I think is now "tapped out"unfortunately..) A rare Ceratocephala goniata cephalon with thoracic segments. It is interesting to note in my old paleontological books, the cephalon is oriented backwards because (I'm assuming) nobody had yet found a complete specimen! 3 Link to comment Share on other sites More sharing options...
piranha Posted September 16, 2019 Share Posted September 16, 2019 4 hours ago, aek said: An additional find from this spot (which I think is now "tapped out"unfortunately..) A rare Ceratocephala goniata cephalon with thoracic segments. It is interesting to note in my old paleontological books, the cephalon is oriented backwards because (I'm assuming) nobody had yet found a complete specimen! In the original description, Warder 1838 is the culprit with the upside down cephalon. Eventually, Vogdes 1876 was the first to discover this incorrect description. Unfortunately, Armstrong & Armstrong 1962 did not get the memo and followed suit with another upside down illustration. Although IFNA does not give a precise description of the Weller 1907 figure, Weller described it accurately as the anterior view of a nearly complete cephalon. What a mess! You are on a hot streak with these unusual Silurian trilobites. Looking forward to a Deiphon americanus in the very near future! Warder, J.A. 1838 MISCELLANIES. 4. New Trilobites: Ceratocephala goniata. American Journal of Science, 1st series, 34(2):377-379 Vogdes, A.W. 1876 Notes on the Genera Acidaspis, Murchison; Odontopleura, Emmerich; and Ceratocephala, Warder. Proceedings of the Academy of Natural Sciences of Philadelphia, 2nd series, 20:138-141 Weller, S. 1907 The Paleontology of the Niagaran Limestone in the Chicago Area: The Trilobita. Natural History Survey, Chicago Academy of Sciences Bulletin, 4(2):163-281 Armstrong, C., Armstrong, P. 1962 Trilobites of the Chicago Region. Mid America Paleontology Society, 59 pp. Link to comment Share on other sites More sharing options...
aek Posted September 17, 2019 Author Share Posted September 17, 2019 Thanks @piranha such a strange looking creature. It's easy to see how Armstrong &Armstrong thought this trilobite could be blind, as the eyes are not apparent. Link to comment Share on other sites More sharing options...
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