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  1. An amazing agnostoid arthropod was recently named in my honor. The Great Cambrian-Ordovician trilobitologist: John Taylor has bestowed Lotagnostus morrisoni upon yours truly. Although the Agnostida have long been classified among the orders of trilobites, because of a number of key differences, they are currently excluded and regarded as a closely related sister group to the polymeroid trilobites. In any event, the Agnostida will always be inextricably associated and studied in conjunction with the Trilobita. I'm very grateful to have the privilege to share this 'Lucky' Lotagnostus here at TFF! Taylor, J.F., Loch, J.D., Repetski, J.E. 2024 Taxonomy and Stratigraphic Distribution of Lotagnostus (Agnostida: Agnostidae) and Associated Trilobites and Conodonts in the Upper Cambrian (Furongian) of Laurentia. Zootaxa, 5422(1):1-66 PDF LINK
  2. Hardly anybody ever talks about the Cambrian fossils of the southern midcontinent (USA). They're super-underappreciated. Show us what you've got! Here's one to start us off: Thorax and pygidium of a trilobite, possibly Orygmaspis, typically referred to as "Orygmaspis cf. Orygmaspis llanoensis" but probably a different species altogether. Note the two pairs of macropleural spines marking the final thoracic segments. Davis Formation (late Cambrian: Furongian), south side of Highway 8, St. François County, Missouri.
  3. ARTICLE 1 LINK ARTICLE 2 LINK ARTICLE 3 LINK 100 page monograph: Wernette, S.J., Hughes, N.C., Myrow, P.M., Sardsud, A. 2023 Trilobites of Thailand's Cambrian–Ordovician Tarutao Group and their Geological Setting. Papers in Palaeontology, 9(5,e1516):1-100 PDF LINK
  4. Fellow members, I have been offered this Ceratonurus. At first glance it appears to be well prepped etc. with no signs of obvious fractures etc. As one should be on guard when purchasing Moroccan material, I would like to seek counsel / opinions / another pair of eyes regarding this specimen which I have been offered. Can anyone see any signs of repair and / or restoration? Thankyou in advance, much appreciated. B30918C5-EF61-4985-9056-11F58396A942.mov B30918C5-EF61-4985-9056-11F58396A942.mov
  5. Marco90

    Itagnostus interstrictus

    From the album: My collection in progress

    Itagnostus interstrictus White 1874 Location: Wheeler Formation, Utah, USA Age: 507 Mya (Wuliuan, Middle Cambrian) Measurements: 5x5x4,5 cm (matrix), 6x3 mm(trilobite) Kingdom: Animalia Phylum: Arthropoda Subphylum: Trilobitomorpha Class: Trilobita Order: Agnostida Suborder: Agnostina Family: Peronopsidae
  6. Marco90

    Elrathia kingii

    From the album: My collection in progress

    Elrathia kingii Meek 1870 Location: Wheeler Formation, Utah, USA Age: 507 Mya (Wuliuan, Middle Cambrian) Measurements: 3x2 cm Kingdom: Animalia Phylum: Arthropoda Subphylum: Trilobitomorpha Class: Trilobita Order: Ptychopariida Suborder: Ptychopariina Family: Alokistocaridae
  7. Marco90

    Morocops ovatus

    From the album: My collection in progress

    Morocops ovatus McKellan & Chatterton 2009 Location: Timrhanrhart Formatiom, Djebel Ouften, Morocco Age: 400 Mya (Eifelian, Middle Devonian) Measurements: 5x3 cm (trilobite), 8x7 cm (matrix) Kingdom: Animalia Phylum: Arthropoda Subphylum: Trilobitomorpha Class: Trilobita Order: Phacopida Suborder: Phacopina Family: Phacopidae
  8. A seemingly simple question seems to not have a simple answer. How many orders of trilobites are there? Not everyone agrees on the number but is there a number that is generally accepted by the experts? I have seen anywhere from 9-14 different orders. @piranha has 14 in this thread, Sam Gon III has 11 on his site and I have seen many other sites with different numbers. Which is most up to date? Thanks in advance for any feedback. I'm going to tag two resident trilobite experts ahead of time. @Kane @piranha That was more than one question but they're all in the same order. Or are they?
  9. Just a note that James Cullison's 1944 monograph on the rocks and fauna of the upper Lower Ordovician of Missouri and Arkansas is now freely available for download or perusal at https://archive.org/details/paper-cullison-1944-the-stratigraphy-of-some-lower-ordovician-formations-of-the This publication has always been devilishly tough to get a hold of. A nice systematic paleontology section deals with the many gastropods and other mollusks as well as the less diverse brachiopods, trilobites, and sponges. The monograph covers the following formations as currently accepted in Missouri: • Smithville Formation • Powell Formation • Cotter Formation • Jefferson City Formation Enjoy and share as you like. Full citation: J. S. Cullison, 1944: "The Stratigraphy Of Some Lower Ordovician Formations Of The Ozark Uplift." The University of Missouri School of Mines and Metallurgy Bulletin Technical Series, Vol. 15, No. 2, 112 pp + 35 pl.
  10. On July 1st, 2021, I went for the first time to a public, personal site and was very pleased with the results of my fossil excursion. The locale consists of several exposed formations, namely the Liberty formation I was hunting in. In my region of southwestern Ohio, that's known to be one of the best fossil-hunting formations due to its remarkable preservation of particularly fragile Ordovician life, even when compared to the excellent fossil preservation quality of other formations in the area. The thirty-three degrees Celsius heat was rather hot by itself, and as the sun's rays made me question my latitude, the rainwater in the ground from the rain several hours prior was evaporating and creating a blanket of humidity-saturated air which prevented my body from transpiring. That was lovely. On top of that, this was above a very tall cutaway, so there was this constant updraft of hot, humid air coming from the bottom. Needless to say, conditions were extremely hot and humid. A thermos filled to the brim with refreshing, ice-cold cranberry-grape juice was a lifesaver, as otherwise I would have certainly overheated and becoming a sizzling omelet atop a frying pan of Ordovician fossils under that laser of a sun! With that being said, this is my first post regarding a fossil hunting trip in three years! While I have not been active on this forum, my paleontological trips have been ever more numerous. I remember you all, as I have been secretly watching in the meantime. I am a fossil sniper, after all. I should mention that I am an adult now, and I would prefer to have the "Youth Member" tag removed from my name. I plan to conduct a full survey of my entire collection before attending university, so look out for that. My collection is considerably sizeable now, having nine years of fossil-hunting under my belt. Here are my finds! Best & rarest for last, though all of them are incredible in their own right. Every edge of a square on the grid is half a centimeter. Assorted rugose corals. Gastropods. Branching bryozoan. The central branching bryozoan specimen in the prior figure under 200x microscope magnification. The skeletal cavity wherein individual zooids once resided 440 million years ago are evident, each 0.2 millimeters in diameter. The sheer level of detail in the preservation is as mind-blowing as this fossil's age. This photo is the product of using a computer to compile 140 photos focused at different layers of the specimen, as microscopes have a very narrow depth of field. I'm sure you all find as this fascinating as I do, so I compiled a photo for you guys. Assorted brachiopods, with two bivalves on the top left. I collected some superb Rafinesquina alternata, which don't tend to come with both fragile and thin halves intact, together, and out of the matrix. There were also some Leptaena that I did not photograph, but were lovely and undulating. The rest are common genera here, except for the fourth one from the right in the bottom row and the partial one of the same species immediately northwest of it, which I would like help identifying. Expect to see it soon on the ID forum. Assorted associated, straight-shelled nautiloid cephalopod septa. A larger example of associated, straight-shelled nautiloid cephalopod septa and a partial living chamber. Calcified straight-shelled nautiloid cephalopod. I always love the crystals on these. Flexicalymene meeki on the left and right. The left one is perfect, and is a very large example of what I generally find--my largest self-found complete trilobite, in fact--so I'm very happy with him. The right one is heavily weathered along its left and right, but the medial length of the pygidium, thorax, and cephalon are all present in some way, and the pleurae and glabella are resonant with Flexicalymene meeki, and I'm very happy with him, too. Adorable, curled little finger hugnuzzles of the ancient sea. Drum roll please! Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 This is a huge living chamber of a straight-shelled nautiloid cephalopod! Unlike the septal segments, the living chamber is very fragile with its thin, unsupported walls. This means it is very rarely preserved. Hence, in my near-decade of fossil hunting, I have never found a complete living chamber with its outer shell included until now. Let alone of this size! The only reason this one survived is because of the encrusting bryozoan that grew over its walls and thus strengthened them after the animal died--Figure 5 demonstrates the layers of the bryozoan well. This is also demonstrated on the side without bryozoan strengthening it in Figure 4, and how it simply crumpled due to the weight of sediments that accumulated on top of it after the animal died. Interestingly, one side has much more encrusting bryozoan than the other--this suggests that immediately after the animal died, part of the shell was resting on the silt of the ocean floor, preventing bryozoan from growing on it. The contrast in the thickness of walls of the living chamber & encrusting bryozoan growth on opposite sides of the fossil is evident between Figures 1 and 2, where in Figure 1 the walls of the living chamber are quite thin (one can tell from the thickness of the dark cracks on the bottom left), whereas in Figure 2 the walls are visibly significantly thicker (and layered from the encrusting bryozoan, upon zooming in). Deducing all of this is so cool. Additionally, Figure 3 zooms in on the bottom left fraction of the visible living chamber in Figure 2, and it actually shows the bryozoan growing around the edge of the living chamber walls and into the living chamber. This means that's the very outer rim of the living chamber! (In Figure 3, the white line is the living chamber wall, and the layers around it are the encrusting bryozoan. The light tan stone inside is just limestone.) On top of the sheer rarity of a fossilized living chamber, especially of this enormous size, having the edge of the living chamber preserved with enough detail to show the bryozoan that that grew into it over its rim—almost half a billion years ago—fascinates me. To finish this post off, there really is a mystery in every fossil. With the encrusting bryozoan only growing one side of the living chamber in the final specimen, and the subtle, hard-to-spot detail of how it grew around the rim and into the living chamber, it's like every fossil is a murder mystery (literally) and we have to be Sherlock Holmes and figure out details about how the animal died. Considering this was 440 million years ago, we're all some pretty hardcore forensic scientists!
  11. ashleydawno4

    Trilobite Information

    I have had this trilobite since I was a small child, I’m now nearly 35. I don’t know anything about it or it’s value. I am looking for help on identifying what kind, how old, and anything else helpful. Anything helps. Thank you!!
  12. Crankyjob21

    Some really cool fossils from my land!

    My collection of some really cool fossils on the land most of the fossils I have in my collection are bought so it’s always nice to find something actually in the field. Now my main goal with this post is to try to identify the trilobite I found today although it only has the head piece, it clearly shows the eye and part of the gabella. The horn coral which are the sort of conical fossils should help identify the age of the rocks. if anyone else can give an ID on the rest of the fossils that would help thanks. By the way these were all found in Dane County, Wisconsin. (PS) I have no clue what the fossil is with the weird holes.
  13. Geyer, G., Landing, E. 2021 The Souss Lagerstätte of the Anti‑Atlas, Morocco: Discovery of the First Cambrian Fossil Lagerstätte from Africa. Nature Scientific Reports, 11(3107):1-8 PDF LINK
  14. Peat Burns

    Briggs TFF Report

    This is a belated report from the Briggs TFF gathering last spring. Here are some photos of TFF'ers working the site: Here are my finds (not in phylogenetic order). Scale in mm throughout. I guess I'll start with one of my bucket listers, a large goniatite: Next, the trilobotes: And "those other arthropods": Now the gastropods: Other Mollusca: Crinoidea: Seedless vascular plant bits: I don't usually collect "hash plates" but such accumulations don't seem very common at these sites, so I picked up this nice one.
  15. Camouflage

    Fossil Models

    Hello to everyone. I am studying Geology in the Aristotle University of Thessaloniki and I am facing difficulties in passing the subject of Invertebrate Paleontology. This subject requires Identification of fossils both in power point but also live. Because of this I am interested in buying models (paper models, plastic models , whatever) of fossils. I have been told by my professor that some of the samples exhibited during classes were sold to the University a very long time ago by a well known shop which I will not name that sells such products. Sadly though I have not been able to find what I need. Since public advertising of such shops is against the forum's rules I would like to be informed by Personal message if necessary of anywhere I can purchase the fossils I need. Also I would be much obliged if someone could point me in the right direction without violating the forum's rules. Thank you in advance
  16. Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to commonly observe the item of interest; paler orange indicates times in earth history to less commonly observe the item of interest. White indicates very little to no practical probability of observing the item of interest. Please keep in mind that the listed indicators are things like “conspicuous horn corals,” purposefully declining to address rare encounters with groups of low preservation potential, low recognizability, etc. Got additions/amendments, especially for the groups mentioned above? Toss them in the comments below! Thank you..... https://docs.google.com/spreadsheets/d/1tVm_u6v573V4NACrdebb_1OsBEAz60dS1m4pCTckgyA
  17. Hello dear fellows, Any ideas about this one from Fezouata Shale? It has 2,8 x 2,0 cm. A Brachiopod, a Hyolith, a Chrondrophore, a Clam??? Thanks in advance.
  18. Hello, I am brand new at fossil collecting and am trying to get specimens for my science class (I’m a high school science teacher). I bought a few fossils pretty cheap not knowing how prevalent fakes are. I think some are fake, partially faked, or enhanced. I don’t want to misinform my students in what is real and what isn’t so I’d love some help! (Fakes aren’t the worst thing for me since we can discuss the use of models in class, I just need to know what is real or fake). Here is my first specimen: a trilobite of unknown origin (I havnt seen one like it online which is why I think it is fake). Thanks!
  19. Gen. et sp. indet.


    Erratic boulder from central Europe. Ordovician or Silurian. Any ideas as for the trilobite group, e.g. order? The ornamentation is quite characteristic, I presume. Librigena?
  20. Gen. et sp. indet.

    trilo head

    Cephalon, or more specifically - a glabella, my father found today, here in Poland. It is an erratic boulder and so its age is likely Ordovician or Silurian. Can someone tell the trilobite group or even a genus?
  21. First trip of the year today to the "Fossil Gardens" at Paulding, Ohio. This is quarry spoil of mid-Devonian age, Silica Formation. There was not a cloud in the sky, and temps were relatively warm at 43 deg. F. I was the only one there for most of the day, and it was extremely peaceful. What a great day. Here are pics of some of the finds. These are "farm fresh" and haven't even been washed yet, but I did take time to polish some horn corals and get some acetate peels (couldn't wait). A large Cystiphylloides rugose coral.
  22. mediterranic

    Mollusc plus trilobite

    A mollusc Sinuites plus a free cheek of a trilobite. Any thoughts about the trilobite in question? Thanks in advance, Miguel
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