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Found 23 results

  1. 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.
  2. 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
  3. Fezouata Endless Fossil's Identification

    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.
  4. 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!
  5. the Cambrian of Argentina

    harrington cambrian1670-1739-1-PB.pdf Horacio J Harrington Paleontologia del Paleozoico inferior de la Argentina I: Las faunas del Cambrico medio de San Juan Revisto del Museo de La Plata,T II,pt 11(Paleontologia) less than 2,5 MB NOTE: in spanish edit: Diacritics omitted
  6. 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
  7. trilobites africains,Algerie

    KHALD Les trilobites a faune benthique varie(FBV) dans la saoura-ougarta Systematique et paleoecologie Khaldi Ahmed Yacine memoire presente pour l óbtention du grade de magister en geologie soutenu le 10/6/2014 NB diacritics omitted summary description:Thesis
  8. Oryctocephalidae

    SHERGOLD CoMMONWEALTH OF AUSTRALIA DEPARTMENT OF NATIONAL DEVELOPMENT BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS BULLETIN 104 Oryctocephalidae(Trilobita: Middle Cambrian)of Australia BY J. H. SHERGOLD publication date: 1969 about 24 MB 58 pages of morphology and systematics,locality list,bibliography summary description(monograph)
  9. Notice

    Notice preliminaire Joachim Barrande:Sur le Systeme Silurien et les Trilobites de Boheme Text only,about 6,6 MB LINK Systeme Silurien du Centre de la Boheme Premiere partie:Recherches paleontologiques vol 1: planches Crustacees etTrilobites (plates/Atlas)..........ABOUT 20,8 MB systemesilurienbarrande supplement au volume 1: Trilobites,crustacees diverses et Poissons size: about 15,5 Mb LEGAL STATUS:out of copyright aetiology(why go look for it?): total annoyance at seeing this thing cited so often and not having it For a mid-nineteenth century monograph ,this is still quite often cited. Needless to say that the taxonomy should be viewed with some circumspection some reasons why these are famous volumes:
  10. Montagne Noire,a short piece

    FeistCourtessolebiogeograsiantypepaleozoictrilobcracscparisi1984.pdf Decouverte de Cambrien Superieur a trilobites de types est-Asiatiques dans la Montagne Noire(France meridional) Raimund Feist,Robert Courtessole C.R Acd.Sc. Paris,t.298,serie II,no 5/1984
  11. the trilobites of Giessen

    LINK Gerhard Hahn and Michael W.R.Amler Revison der Karbontrilobiten von Koenigsberg b. Giessen Geologica et Palaeontologica,19,s.71-79,28-11 1985 note:Konigsberg with diacritic trilobites from an olistostrome("submarine slide") Olistostromes are VERY common in Paleozoic deposits Nota very big bene:In German English language abstract present
  12. ovalocephalus

    zhouzhitrilobarthropevolRSL.pdf Evolutional trends and Paleobiogography of the Ordovician Trilobite Ovalocephalus Korleva 1959 Zhou Zhiyi,Yuan Wenwei,Zhou Zhiqiang Proceedings of the Royal Society,B,2010,v.277,p.257-266
  13. bathyurus and Eomonorachus

    ontariomusbathyurtrilobitesbathyureomonorbiofacies00ludv.pdf about 2.1Mb Rolf Ludvigsen The Trilobites Bathyurus and Eomonorachus from the Middle Ordovician of Oklahoma and their biofacies significance Royal Ontario Museum Life Sciences Contributions 114 (1978) As far as I could ascertain,not posted previously.
  14. trilobite

    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?
  15. 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?
  16. Great day in Paulding, Ohio

    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.
  17. The Llanvirn of Argentina

    ART 5.pdf As far as I could ascertain,not posted before.If I'm wrong sincere apologies to the previous poster outtakes: once again the same thing happens the upload takes too long ,and it goes wrong. Is anybody else experiencing difficulties when posting in "documents"? Case of butterfingers on my part?
  18. nothing groundbreaking,nothing new

    olenid cephalon(source indicated,after a fashion)
  19. Mollusc plus trilobite

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

    NB.:LARGE!! NNB.:get it while you can(edit:works to nov.6th) http://rstb.royalsocietypublishing.org/content/royptb/272/920/537.full.pdf
  21. These are a few of the pdf files (and a few Microsoft Word documents) that I've accumulated in my web browsing. MOST of these are hyperlinked to their source. If you want one that is not hyperlinked or if the link isn't working, e-mail me at joegallo1954@gmail.com and I'll be happy to send it to you. Please note that this list will be updated continuously as I find more available resources. All of these files are freely available on the Internet so there should be no copyright issues. Articles with author names in RED are new additions since April 9, 2018. Phylum Arthropoda Subphylum Trilobitomorpha General Trilobites General Trilobites - Asia/Malaysia/Pacific Islands Kobayashi, T. (1987). On the Damesellidae (Trilobita) in Eastern Asia. Proc. Japan Acad., Series B., Vol.63, Number 3. Kobayashi, T. (1985). The Taihungshaniidae and Birmanitidae, Trilobita. Proc. Japan Acad., Series B., Vol.61, Number 1. Kobayashi, T. (1985). On the Dikelokephaliniidae (Trilobita). Proc. Japan Acad., Series B., Vol.61, Number 1. General Trilobites - Australia/New Zealand Adrain, J.M. and B.D.E. Chatterton (1995). The Otarionine Trilobites Harpidella and Maurotarion, With Species from Northwestern Canada, the United States, and Australia. J.Paleont., 69(2). Wright, A.J. and R.A. Cooper (2011). Chapter 5. Phylum arthropoda, subphylum trilobitomorpha: trilobites. In: New Zealand Inventory of Biodiversity - Volume Two: Kingdom Animalia. Gordon, D.P. (ed.), Canterbury University Press, Christchurch, New Zealand. General Trilobites - Europe (including Greenland) Crônier, C. (2003). Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses-et-Veyran, Montagne Noire. Acta Palaeontologica Polonica, 48(1). Owens, R.M. (1974). The Affinities of the Trilobite Genus Scharyia, With a Description of Two New Species. Palaeontology, Vol.17, Part 3. Schoenemann, B. and E.N.K. Clarkson (2011). The Eyes of Bohemian Trilobites. Geol.Výzk.Mor.Slez., Brno, 2011/1. Shergold, J.H. (1966). A Revision of Acaste downinigae (Murchison) and Related Trilobites. Palaeontology, Vol.9, Part 2. General Trilobites - North America Adrain, J.M. and B.D.E. Chatterton (1995). The Otarionine Trilobites Harpidella and Maurotarion, With Species from Northwestern Canada, the United States, and Australia. J.Paleont., 69(2). Palmer, A.R. (1962). Glyptagnostus and Associated Trilobites in the United States. U.S. Geological Survey, Professional Paper 374-F. Ross, R.J. (1951). Stratigraphy of the Garden City Formation in Northeastern Utah, and its Trilobite Faunas. Peabody Museum of Natural History, Bulletin 4. Shrake, D.L. (2005). Ohio Trilobites. Ohio Department of Natural Resources, GeoFacts Number 5. Vogdes, A.W. (1892). On the North American Species of the Genus Agnostus. The American Geologist, Vol.IV. Walter, O.T. Trilobites of Iowa and Some Related Paleozoic Forms. Iowa Geological Survey. (Thanks to doushantuo for locating this one!) Weller, S. (1900). The Paleontology of the Niagaran Limestone in the Chicago Area. The Trilobita. The Natural History Survey, Bulletin Number 4, Part II. (178 pages, 26.6MB download) General Trilobites Adrain, J.W. and S.R. Westrop (1999). Trilobite Paleobiology: Past, Present and Future. J.Paleont., 73(2). Alles, D.L. (ed.) (2006). Trilobites. PDF version of on-line paper. Numerous pictures. Bonino, E. (2006). Systematic Relationships and Chronological Extent of the nine Trilobite Orders. (POSTER in .pdf format) Brezinski, D.K. (2003). Evolutionary and Biogeographical Implications of Phylogenetic Analysis of the Late Palaeozoic Trilobite Paladin. Special Papers in Palaeontology, Number, 70. Chlupáč, I. (1975). The distribution of phacopid trilobites in space and time. Fossils and Strata, Number 4. Clarkson, E.N.K. (1973). The Eyes of Asaphus raniceps Dalman (Trilobita). Palaeontology, Vol.16, Part 3. Clarkson, E.N.K. (1967). Fine Structure of the Eye in Two Species of Phacops (Trilobita). Palaeontology, Vol.10, Part 4. Clarkson, E., et al. (2006). The Eyes of Trilobites: The oldest preserved visual system. Arthropod Structure & Development, 35. Congreve, C.R. and B.S. Lieberman (2011). Phylogenetic and Biogeographic Analysis of Sphaerexochine Trilobites. PLoS ONE, 6(6). (Read on-line or download a copy.) Congreve, C.R. and B.S. Lieberman (2010). Phylogenetic and Biogeographic Analysis of Deiphonine Trilobites. Journal of Paleontology, 84(1). Crônier, C. (2013). Morphological Disparity and Developmental Patterning: Contribution of Phacopid Trilobites. Palaeontology, 2013. Daley, A.C. and H.B. Drage (2015). The fossil record of ecdysis, and trends in the moulting behaviour of trilobites. Arthropod Structure & Development, xxx. (Article in Press). Dalingwater, J.E. and J. Miller (1977). The Laminae and Cuticular Organization of the Trilobite Asaphus raniceps. Palaeontology, Vol.20, Part 1. Drage, H.B. and A.C. Daley (2016). Recognising moulting behaviour in trilobites by examining morphology, development and preservation: Comment on Blazejowski et al. 2015. BioEssays, 38. Foote, M. (1991). Morphologic Patterns of Diversification: Examples from Trilobites. Palaeontology, Vol.34, Part 2. Fortey, R.A. (2004). The Lifestyles of Trilobites. American Scientist, Vol.92. Fortey, R.A. (2000). Olenid trilobites: The oldest known chemoautotrophic symbionts? PNAS, Vol.97, Number 12. Fortey, R.A. (1990). Ontogeny, Hypostome Attachment, and Trilobite Classification. Palaeontology, Vol.33, Part 3. Fortey, R.A. and R.M. Owens (1999). Feeding Habits in Trilobites. Palaeontology, Vol.42, Part 3. Fortey, R.A. and R.M. Owens (1997). Bubble-headed Trilobites, and a new Olenid Example. Palaeontology, Vol.40, Part 2. Fortey, R.A. and R.M. Owens (1975). Proetida - a new order of trilobites. Fossils and Strata, Number 4. Fortey, R.A. and B.D.E. Chatterton (1988). Classification of the Trilobite Suborder Asaphina. Palaeontology, Vol.31, Part 1. Fortey, R.A. and S.F. Morris (1978). Discovery of Nauplius-Like Trilobite Larvae. Palaeontology, Vol.21, Part 4. Fusco, G., et al. (2011). Developmental Trait Evolution in Trilobites. Evolution, 66-2. Fusco, G., et al. (2004). Exploring Developmental Modes in a Fossil Arthropod: Growth and Trunk Segmentation of the Trilobite Aulacopleura konincki. The American Naturalist, Vol.163, Number 2. Gon, S.M. (2009). A Pictorial Guide to the Orders of Trilobites. Hegna, T.A. (2010). The function of forks: Isotelus-type hypostomes and trilobite feeding. Lethaia, Vol.43. Henningsmoen, G. (1975). Moulting in trilobites. Fossils and Strata, Number 4. Henningsmoen, G. (1951). Remarks on the Classification of Trilobites. Norsk Geologisk Tidsskrift, 29. Hughes, C.P. (1970). Statistical Analysis and Presentation of Trinucleid (Trilobita) Fringe Data. Palaeontology, Vol.13, Part 1. Hughes, C.P. and A.J. Wright (1970). The Trilobites Incaia Whittard, 1955 and Anebolithus Gen. Nov. Palaeontology, Vol.13, Part 4. Hughes, N.C. (2007). The Evolution of Trilobite Body Patterning. Ann.Rev. Earth Planet.Sci., 35. Hughes, N.C. (2003). Trilobite Tagmosis and Body Patterning from Morphological and Developmental Perspectives. Integr. Comp. Biol., 43. Hughes, N.C. (2003). Trilobite body patterning and the evolution of arthropod tagmosis. Bioessays, 25.4. Hughes, N.C., A. Minelli and G. Fusco (2006). The ontogeny of trilobite segmentation: a comparative approach. Paleobiology, 32(4). Hughes, N.C., R.E. Chapman and J.M. Adrain (1999). The stability of thoracic segmentation in trilobites: a case study in developmental and ecological constraints. Evolution & Development, 1:1. Lerosey-Aubril, R., T.A. Hegna and S. Olive (2011). Interring internal anatomy from the trilobite exoskeleton: the relationship between frontal auxiliary impressions and the digestive system. Lethaia, Vol.44. Lieberman, B.S. and T.S. Karim (2010). Tracing the trilobite tree from the root to the tips: A model marriage of fossils and phylogeny. Arthropod Structure and Development, 39. McCormick, T. (1995). Patterns and Implications of Stasis in Trilobites. Ph.D. Thesis - Glasgow University. Miller, J. (1975). Structure and function of trilobite terrace lines. Fossils and Strata, Number 4. Minelli, A., G. Fusco and N.C. Hughes (2003). Tagmata and Segment Specification in Trilobites. Special Papers in Palaeontology, 70. Opik, A.A. (1961). Alimentary Caeca of Agnostids and Other Trilobites. Palaeontology, Vol.3, Part 4. Osmolska, H. (1975). Fine morphological characters of some Upper Palaeozoic trilobites. Fossils and Strata, Number 4. Peteya, J.A. (2013). Resolving Details of the Nonbiomineralized Anatomy of Trilobites Using Computed Tomographic Imaging Techniques. Masters Thesis - The Ohio State University. Rabano, I., R. Gozalo and D. Garcia-Bellido (2008). Advances in Trilobite Research. Institito Geologico y Minero Espana, Madrid. (entire 449 page book) Ramsköld, L. and G.D. Edgecombe (1991). Trilobite Monophyly Revisited. Historical Biology, Vol.4. Raymond, P.E. (1920). The Appendages, Anatomy, and Relationships of Trilobites. Memoirs of the Connecticut Academy of Arts and Sciences, Vol.VII. (227 pages) Rudkin, D.M. (1985). Exoskeletal abnormalities in four trilobites. Can.J. Earth Sci., 22. Rutana, M.A. (2015). New Information About the Internal Anatomy and Taphonomic History of Trilobites Revealed Through CT Scanning. Senior Thesis - The Ohio State University. Schoenemann, B., E.N.K. Clarkson and G. Horvath (2015). Why did the UV-A-induced photoluminescent blue-green glow in trilobite eyes and exoskeletons not cause problems for trilobites? PeerJ, 3:e1492. St. John, J. (2007). The Earliest Trilobite Research (Antiquity to the 1820s). In: Fabulous Fossils - 300 Years of Worldwide Research on Trilobites. Mikulic, D.G. (ed.), Illinois State Geological Survey. Shergold, J.H. (1977). Classification of the Trilobite Pseudagnostus. Palaeontology, Vol.20, Part 1. Shergold, J.H. (1967). A Revision of Acastella spinosa (Salter 1864) With Notes on Related Trilobites. Palaeontology, Vol.10, Part 2. Slavickova, J. and P. Kraft (2001). Remarks on the palaeoecology of agnostid trilobites. Journal of the Czech Geological Society, 46/3-4. Størmer, L. Studies on Trilobite Morphology. Part III. The Ventral Cephalic Structures With Remarks on the Zoological Position of the Trilobites. Norsk Geologisk Tidsskrift, 29. Størmer, L. Studies on Trilobite Morphology, Part II. The Larval Development, the Segmentation and the Sutures, and Their Bearing on Trilobite Classification. Norsk Geologisk Tidsskrift, 21. Størmer, L. Studies on Trilobite Morphology. Part I. The Thoracic Appendages and Their Phylogenetic Significance. Norsk Geologisk Tidsskrift, 19. Størmer, L. (1980). Sculpture and Microstructure of the Exoskeleton in Chasmopinid and Phacopid Trilobites.Palaeontology, Vol.23, Part 2. Thomas, A.T. (1977). Classification and Phylogeny of Homalonotid Trilobites. Palaeontology, Vol.20, Part 1. Thomas, A.T. and R.M. Owens (1978). A Review of the Trilobite Family Aulacopleuridae. Palaeontology, Vol.21, Part 1. Walcott, C.D. (1881). The Trilobite: New and Old Evidence Relating to Its Organization. Bulletin of the Museum of Comparative Zoology at Harvard College, Vol.VIII, Number 10. Webster, M. and M.L. Zelditch (2008). Integration and Regulation of Developmental Systems in Trilobites. In: Advances in trilobite research. Rabano, I., R. Gozalo, and D. Garcia-Bellido (eds.). Whittington, H.B. (1996). Sphaeroidal Enrolment and Thoracic Characters in Beltella depressa and Other Olenid Trilobites. Palaeontology, Vol.39, Part 2. Wilmot, N.V. (1990). Biomechanics of Trilobite Exoskeletons. Palaeontology, Vol. 33, Part 4. Wilmot, N.V. and A.E. Fallick (1989). Original Mineralogy of Trilobite Exoskeleton. Palaeontology, Vol.32, Part 2.