fossil35 Posted December 21, 2023 Share Posted December 21, 2023 I shared a few of the bigger things I found when asking questions. But thought I'd share some of the other finds. I have find a lot of little and mini trilobites thought was interesting. Smallest 1mm. #1 #2 #2(closer) #3 #4 #5 #6(smallest) #6(closer) 15 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 21, 2023 Share Posted December 21, 2023 Wow! This is some real good photography! Great finds as well. The middle one in pic 6 looks like a Bolaspidella possibly. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
fossil35 Posted December 21, 2023 Author Share Posted December 21, 2023 Wasn't sure with the smallest ones if they where still Elrathia Kingi, which is what find most of. I did find a few more brachiopod but they are not as good as the first I posted before(will post the 2). The brachiopod are so thin they seem to break or chip in the splitting. #1 #2 2 Link to comment Share on other sites More sharing options...
piranha Posted December 21, 2023 Share Posted December 21, 2023 7 hours ago, Fossildude19 said: The middle one in pic 6 looks like a Bolaspidella possibly. This M1 meraspid is a good match with Elrathia. The axial furrows on the cephalon have a greater length anteriorly. In later stages Bolaspidella M2-M3 has incipient occipital and axial nodes. Elrathia M4 and older are easily differentiated lacking axial spines. Bolaspidella has axial spines on the fourth to eighth thoracic tergites. Hopkins, M.J. 2021 Ontogeny of the Trilobite Elrathia kingii (Meek) and Comparison of Growth Rates Between Elrathia kingii and Aulacopleura koninckii (Barrande). Papers in Palaeontology, 7(2):985-1002 PDF LINK 3 Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 21, 2023 Share Posted December 21, 2023 1 hour ago, piranha said: This M1 meraspid is a good match with Elrathia. The axial furrows on the cephalon have a greater length anteriorly. In later stages Bolaspidella M2-M3 has incipient occipital and axial nodes. Elrathia M4 and older are easily differentiated lacking axial spines. Bolaspidella has axial spines on the fourth to eighth thoracic tergites. I was actually referencing this one... It's actually picture number 5, but 6th from the top. I missed the numbers on my initial read -through. Still, probably wrong. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
piranha Posted December 22, 2023 Share Posted December 22, 2023 The comparison of Elrathia and Bolaspidella meraspid morphology can be confusing. Besides the occipital and axial spines: Bolaspidella housensis has four pairs of glabellar tubercles that appear at M5 and then disappear at stage M9. Elrathia holaspids have 13 thoracic segments and Bolaspidella holaspids have 15 thoracic segments. However, there is variability with Bolaspidella housensis holaspids according to Robison 1964: "...sometimes possess medial nodes or spines". [holaspid (1) from Robison 1964 – holaspid (2) from Robison et al. 2015] Lee, D.C., Chatterton, B.D.E. 2005 Protaspid Ontogeny of Bolaspidella housensis (Order Ptychopariida, Class Trilobita), and other Similar Cambrian Protaspides. Transactions of the Royal Society of Edinburgh: Earth Sciences, 96(1):21-41 PDF LINK Robison, R.A. 1964 Late Middle Cambrian Faunas from Western Utah. Journal of Paleontology, 38(3):510-566 Robison, R.A., Babcock, L.E., Gunther, V.G. 2015 Exceptional Cambrian Fossils from Utah: A Window into the Age of Trilobites. Utah Geological Survey Miscellaneous Publication, 15-1:1-97 5 Link to comment Share on other sites More sharing options...
trilobites_are_awesome Posted December 22, 2023 Share Posted December 22, 2023 Anyway great finds! Cheers! James Link to comment Share on other sites More sharing options...
fossil35 Posted December 23, 2023 Author Share Posted December 23, 2023 Find a new one thought was interesting. Half ate trilobite. 1 Link to comment Share on other sites More sharing options...
fossil35 Posted December 26, 2023 Author Share Posted December 26, 2023 Found another mini trilobite and few more little guys. #1(closer pic) #1(far back) #2 #3 Link to comment Share on other sites More sharing options...
fossil35 Posted December 28, 2023 Author Share Posted December 28, 2023 Another little one. 1 Link to comment Share on other sites More sharing options...
fossil35 Posted January 2 Author Share Posted January 2 Few more little things. May not be many big ones but lots of little guys. #1 #2 #3 2 Link to comment Share on other sites More sharing options...
fossil35 Posted January 5 Author Share Posted January 5 Had to clean this one bit but turned out ok. 1 Link to comment Share on other sites More sharing options...
fossil35 Posted March 14 Author Share Posted March 14 Had some leftover little pieces shale that have just been weathering for some time. Found few more little ones. An early stage. #1 (guessing M0 stage) Found brachiopod half. Couldn't find the other half in the pieces but half got was nice. #2 Link to comment Share on other sites More sharing options...
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