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Found 281 results

  1. Can anyone please spare any thoughts about these? You see loads on eBay, spanning from laughable forgeries, to partially real, to entirely real. Not sure about these. My guess would be at least partially real, but I'd be interested in the thoughts of anyone more experienced.
  2. Iowa Quarry

    Last Sunday I had the opportunity to travel to East Central Iowa to collect Devonian fossils. It was a nice foggy morning drive to the quarry. Upon approaching the quarry, there was a house burning down- a odd, surreal scene. At the bottom of the quarry could smell the smoke from the house. No pics of the quarry were permitted which is too bad as it is a geologically fascinating place. Devonian Cedar Valley formation, lower Solon exposed as well as Pennsylvanian karsts. Here are a few of my finds. Hexagonaria Trilobites. Eldredgeops peeking out from the rocks Acleistoceras sp And last, but not least, this nice crystal. Thanks for looking. Cheers
  3. Malvinella buddeae

    From the album Trilobites

    Taxonomy: Malvinella buddeae Age: Lower Devonian (Belen Fm) Location: La Paz, Bolivia Source: Purchased
  4. Today I spent about two hours near Lawrenceburg, Indiana collecting some Ordovician fossils. I had a lot of luck with collecting some great looking complete brachiopods that I believe might be Herbertella, but I am going to ask the experts @Herb and @Peat Burns on this formation and see if they can correct any mistakes or unidentified finds. Rafinesquina ponderosa Platystrophia? It was bryozoan heaven today, as shown by some of the pics below. One piece was extremely large. Trilobites Parts ? Gastropods- "Sinuites" Unknown ? And some very nice small hash plates that are probably my favorite fines of the day.
  5. Today on day 2, I spent about six hours in the on and off rain, near Lawrenceburg, Indiana collecting Ordovician fossils. I found numerous trilobite parts, but nothing complete. Things that believe are parts of trilobites- "Isotelus" fragments. These two pieces were on a very large block that was not feasible to try and move. I figured that I would try and get them out, but unfortunately, I was not successful . Many Cephalopods – Brachiopods- "Platystrophia" "Rafinisquina" Gastropods– Believe these to be "Cyclonema". Bryozoan– Crinoid Stems– How they were found:
  6. Greenops Trilobite from Madison Co., NY.

    From the album Middle Devonian

    Greenops sp. Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road Quarry Lebanon, NY. Collected 10/30/17 in the company of Fossildude19.
  7. Hey everyone, I'm looking for trip suggestions for this December. My wife and I recently had a little time free up and we have flight/hotel points to redeem. We'd prefer somewhere that's not super cold (we're from Colorado) but something that also has some fun things to do besides collecting, like hiking or exploring. I've been considering trips to NC, SC, or the Peace River. I'd love to hear from anyone who would have some suggestions for places where we can vacation and I can get out for a few afternoons to look for cool specimens. I'd be particularly interested in fish/shark tooth locations, but invertebrates would also be cool (especially ammonites, trilobites, etc). Let me know what you guys think - any suggestion is appreciated!
  8. Old news

    As far As I could ascertain, not posted yet edit: Amazing Czech Open-Access Pdf Library on this very forum Posted by Piranha in 2013 you live & learn Šnajdr M. (1983): Revision of the trilobite type material of I.Hawle and A. J. C. Corda, 1847 Sborník Národního muzea v Praze, řada B - Přírodní vědy 39 (3): 129. [PDF fulltext] NB 35, Mb or thereabouts TAXONOMY warning:This is from 1983,remember!!
  9. My wife and I just got back from a 1700-mile road trip from our home in Northern California to do some trilobite hunting in Utah and Nevada. It was a 5-day trip, with a total of about 8 hours of digging spread across 2 days, but well worth it. I will give you the highlights here. After driving across California, we spent the first night in Reno, then headed out on Highway 50 toward the U-Dig fossil quarry out of Delta, Utah. We spent the second night in Ely, Nevada. Along the way, we stopped in Austin for lunch and helped the owner of a nearby trading post identify an unknown fish fossil they had for sale (you can read about that here). We got to U-Dig mid-morning of the third day and spent half a day there. The last 20 miles is a drive along a well-maintained dirt road (good enough that with my stock 4WD SUV I could drive 50-55 mph along most of it). Other people on this forum have posted about their experiences at U-Dig, so I won’t spend a lot of time repeating the basics. We were pleased with the support we got from Gene and if you’ve never been there, I would recommend it. This was my second time there (the first was 8 years ago), and my wife’s first time. I have to say we weren’t as successful as on my last visit, but still got a good haul. Most, however, were only molts or partials, we got very few full trilobites. I’ve included some photos below. Lots of prep work still remaining, and I’ll probably split several of the slabs again to see what else I might find. If you go, one word of advice. They will provide you with a chisel-edge rock hammer, a 2-lb sledge and large chisel, and a bucket to hold everything you find. I brought all my own stuff and am glad I did. They show you how to split the shale with the chisel edge of the hammer, but I found that to be a fairly coarse way to do it. I found it much easier to use thin rock-splitting chisels like these. They are cheap, so I’d recommend you take one or two along. The next day we headed out to Caliente, Nevada, to dig at the Oak Springs Trilobite Site just off Highway 93. There is no fee to dig here, which means there is no one to advise you, you’re on your own. This is another Cambrian site with the possibility of finding several species of Olenellus trilobites. We got there just after lunch and spent the afternoon there. The parking area is about a quarter mile from the highway down a good dirt road (but not a 50-mph road!). Most people park there and walk a quarter mile along a developed path to the dig. If you’ve done your homework, though, you’ll know you can continue another short distance and park just at the base of the swale where the trilobites are. That makes it an easy walk, especially if you are carrying a lot of tools. in addition to my tool bag, I was carrying a Harbor Freight pry bar and my brand new Estwing PaleoPick, so I was happy to shorten the walk. You can tell when you are at the site because it is littered with broken pieces of shale and there are potholes all around where people have been digging. We spent the first couple of hours without any luck as I moved from one location to another. Then I moved to yet another location and immediately saw a cephalon so I knew my luck was changing. It turned out to be a mini mother-lode of cephalons but no full trilobites, which apparently are very rare. While we found a few cephalons among the loose pieces of shale, I had much better success digging out larger slabs and splitting them. I haven’t yet gone through them in detail to make good identifications but they look primarily like Olenellus species, which are what you will predominantly find. Some sample photos below. Given that I didn’t have to pay to dig and it took considerable effort to find anything, I have to say this was the more enjoyable day of digging. But if you go, be aware that many people who go there don’t find anything. The day we were there I only saw one other person. (He tagged along with my success to dig nearby.) On the way home, we took Nevada Highway 375, known as “The Extraterrestrial Highway” because it runs close to the infamous Area 51. We stopped in the tiny hamlet of Rachel to visit the Little A’le’Inn, a souvenir shop, diner, and motel. If you get the chance, be sure to stop in. On my last U-Dig adventure I spent a night there, which was quite an experience (you can read about it here). I don’t think it has changed much in the last 8 years except there were more tourists there this time. Overall, we had a great time. Once I sort through everything I will post a few samples for help with identification. The sign along US Highway 6: U-Dig office: Steve digging (friendly dogs belong to another digger): The haul back at home: Elrathia kingii (I think it's a molt): Small Elrathia kingii: Peronopsis (needs more prep):
  10. I am hoping to add some trilobites to my fossil collection. I am especially looking for ones that look cartoonish for lack of a better word. Ones with big bulging eyes and the like, but I am open to all offers. Let me know if you have any and are willing to trade. -Matt
  11. Cambrian oddysey

    Hi everybody!!! How's life my friends ??? It's been a long time Recently I went with my father to look for trilobites in Cambrian sediments. Sadly we didn't found any complete trilo, but we've found other specimens. I Hope you like It
  12. 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 October 12, 2017. Phylum Arthropoda Ordovician Trilobites Africa/Middle East Corbacho, J. and F.J. Lopez-Soriano (2013). Chattiaspis? budili : a new Dalmanitidae species from Morocco; Upper Ordovician (Lower Katian). Batalleria, 19. Corbacho, J. and J.A. Vela (2013). Parvilichas marochii : New genus and species of Lichidae from the Zagora region (Morocco); Early Ordovician (Floian). Scripta Musei Geologici Seminarii Barcinonensis - Series palaentologica, Number XIV. Corbacho, J. and F.J. Lopez-Soriano (2012). A new asaphid trilobite from the Lower Ordovician (Arenig) of Morocco. Batalleria, 17. Corbacho, J. and C. Kier (2011). Trilobites of a new outcrop of Upper Ordovician in Jebel Tijarfaiouine, El Kaid Errami (Morocco), with first mention of the genus Corrugatagnostus. Scripta Musei Geologici Seminarii Barcinonensis - Series palaentologica, Number X. Corbacho, J. and J.A. Vela (2010). Giant Trilobites from Lower Ordovician of Morocco. Batalleria, 15. Dean, W.T. and Z. Zhiyi (1988). Upper Ordovician Trilobites from the Zap Valley, South-East Turkey. Palaeontology, Vol.31, Part 3. El-Khayal, A.A., and M. Romano (1985). Lower Ordovician Trilobites from the Hanadir Shale of Saudi Arabia. Palaeontology, Vol.28, Part 2. Feist, R., M. Yazdi and T. Becker (2003). Famennian Trilobites from the Shotori Range, E-Iran. Ann.Soc.Geol. du Nord, 10. Lopez-Soriano, F.J. and J. Corbacho (2012). A new species of Symphysops from the Upper Ordovician of Morocco. Batalleria, 17. Martin, E.L.O., et al. (2016). Biostratigraphic and palaeoenvironmental controls on the trilobite associations from the Lower Ordovician Fezouata Shale of the central Anti-Atlas, Morocco. Palaeogeography, Palaeoclimatology, Palaeoecology, 460. Pour, M.G. (2006). Early Ordovician (Tremadocian) trilobites from Simeh-Kuh, Eastern Alborz, Iran. In: Studies in Palaeozoic palaeontology. Bassett, M.G. and V.K. Deisler (eds.), National Museum of Wales Geological Series, Number 25. Pour, M.G. and L.E. Popov (2009). First report on the occurrence of Neseuretinus and Ovalocephalus trilobites in the Middle Ordovician of Iran. Acta Palaeontologica Polonica, 54(1). Pour, M.G. and S.T. Turvey (2009). Revision of some Lower to Middle Ordovician leiostegiid and associated trilobites from Iran and China. Memoirs of the Association of Australasian Palaeontologists, 37. Pour, M.G., M. Vidal and M. Hosseini-Nezhad (2007). An Early Ordovician Trilobite assemblage from the Lashkarak Formation, Dimghan area, northern Iran. Geobios, 40. Pour, M.G., et al. (2015). First reported Late Ordovician trilobites from the High Zagros Ranges, Iran: a biogeographic link between Gondwanan Chinese and Mediterranean Faunas. Geobios, xxx. (Article in Press) Rábano, I., J.C. Gutiérrez-Marco and D.C. García-Bellido (2014). A remarkable illaenid trilobite from the Middle Ordovician of Morocco. Bulletin of Geosciences, 89(2). Rábano, I., et al. (2010). Two more Bohemian trilobites from the Ordovician of Portugal and Morocco. Bulletin of Geosciences, 85(3). Asia/Malaysia/Pacific Islands Fortey, R.A. (1997). Late Ordovician Trilobites from Southern Thailand. Palaeontology, Vol.40, Part 2.Lee, D.-C. (2013). Late Ordovician trilobites from the Xiazhen Formation in Zhuzhai, Jianxi Province, China. Acta Palaeontologica Polonica, 58(4). Pour, M.G., M. and S.T. Turvey (2009). Revision of some Lower to Middle Ordovician leiostegiid and associated trilobites from Iran and China. Memoirs of the Association of Australasian Palaeontologists, 37. Zhou, Z.Q. and Z.-Y. Zhou (2006). Late Ordovician trilobites from the Zhusilenghaierhan area, Ejin Banner, western Inner Mongolia, China. Memoirs of the Association of Australasian Palaeontologists, 32. Zhou, Z.-Y and Z.Q. Zhou (2007). The Late Ordovician cyclopygid trilobite Sagavia Koroleva, 1967, from the Pagoda Formation of southwestern Shaanxi, China. Memoirs of the Association of Australasian Paleontologists, 34. Zhou, Z.-Y,, W.T. Dean and H. Luo (1998). Early Ordovician Trilobites from Dali, West Yunnan, China and Their Palaeobiological Significance. Palaeontology, Vol.41, Part 3. Zhou, Z.-Y. and W.T. Dean (1986). Ordovician Trilobites from Chedao, Gansu Province, North-West China. Palaeontology, Vol.29, Part 4. Zhou, Z.-Y,, et al. (1998). Ordovician Trilobites from the Dwangou Formation, Kalpin, Xinjiang, North-West China. Palaeontology, Vol.41, Part 4. Zhou, Z.-Y., et al. (1994). Cyclopygid Trilobites from the Ordovician of Northeastern Tarim, Xinjiang, Northwest China. Rec. West Aust.Mus., 16(4). Australia/New Zealand Campbell, K.S.W. and G.J. Durham (1970). A New Trinucleid Trilobite from the Upper Ordovician of New South Wales. Palaeontology, Vol.13, Part 4. Fortey, R.A. and J.H. Shergold (1984). Early Ordovician Trilobites Nora Formation, Central Australia. Palaeontology, Vol.27, Part 2. Shergold, J.H. (1975). Late Cambrian and Early Ordovician Trilobites from the Burke River Structural Belt, Western Queensland, Australia. Department of Minerals and Energy, Bureau of Mineral Resources, Geology and Geophysics, Australian Government Publishing Service, Bulletin 153, Vol.1 (text). Webby, B.D. (1974). Upper Ordovician Trilobites from Central New South Wales. Palaeontology, Vol.17, Part 2. Webby, B.D. (1973). Remopleurides and Other Ordovician Trilobites from New South Wales. Palaeontology, Vol.16, Part 3. Webby, B.D. (1971). The Trilobite Pliomerina Chugaeva from the Ordovician of New South Wales. Palaeontology, Vol.14, Part 4. Europe (including Greenland and Siberia) Ahlberg, P. (1989). Agnostid trilobites from the Upper Ordovician of Sweden and Bornholm, Denmark. Bull.geol.soc. Denmark, Vol.37. Ahlberg, P. (1989). Agnostid Trilobites from the Lower Ordovician Komstad Limestone Formation of Killerod, Scania, Sweden. Palaeontology, Vol.32, Part 3. Bergström, J., H. Pärnaste and Z. Zhiyi (2013). Trilobites and biofacies in the Early-Middle Ordovician of Baltica and a brief comparison with the Yangtze Plate. Estonian Journal of Earth Sciences, 62(4). Bruton, D.L. (1976). The Trilobite Genus Phillipsinella from the Ordovician of Scandinavia and Great Britain. Palaeontology, Vol.19, Part 4. Bruton, D.L. (1968). The Trilobite Genus Panderia from the Ordovician of Scandinavia and the Baltic Areas. Norsk Geologisk Tidsskrift, Vol.48 Bruton, D.L. and A.W. Owen (1988). The Norwegian Upper Ordovician illaenid trilobites. Norsk Geologisk Tidsskrift, Vol.68. Budil, P. and J. Bruthansova (2005). Moulting in Ordovician Dalmanitoid and Acastoid Trilobites of the Prague Basin. Preliminary Observation. Geologica acta, Vol.3, Number 004. Budil, P., O. Fatka and J. Bruthansová (2003). Trilobite fauna of the Šárka Formation at Praha-Červený vrch Hill (Ordovician, Barrandian Area, Czech Republic). Bulletin of Geosciences, Vol.78, Number 2. Budil, P., et al. (2011). Arthrorhachis Hawle & Corda, 1847 (Agnostida) in the Prague Basin (Barrandian area, Czech Republic) revisited. Bulletin of Geosciences, 86(4). Budil, P., et al. (2010). Two unique Middle Ordovician trilobites from the Prague Basin, Czech Republic. Journal of the Natural History Museum (Prague), Vol.179(8). de Carvalho, C.N. (2006). Roller Coaster Behavior in the Cruziana rugosa Group from Penha Garcia (Portugal): Implications for the Feeding Program of Trilobites. Ichnos, 13. Dean, W.T. (1991). Ordovician trilobites from the inlier at Le Petit Fond d'Oxhe, Belgium. Bulletin De L'Institut Royal Des Sciences Naturelles De Belgique, Sciences De La Terre, 61. Dean, W.T. (1962). The Ordovician Trilobite Genus Tiresias M'Coy, 1846. Palaeontology, Vol.5, Part 2. Dean, W.T. (1959). Duftonia, a New Trilobite Genus from the Ordovician of England and Wales. Palaeontology, Vol.2, Part 1. Fatka, O., P. Budil and M. David (2015). Digestive structures in Ordovician trilobites Colpocoryphe and Flexicalymene from the Barrandian area of Czech Republic. Estonian Journal of Earth Sciences, 64,4. Fatka, O., et al. (2013). Fossilized guts in trilobites from the Upper Ordovician Letna Formation (Prague Basin, Czech Republic). Bulletin of Geosciences, 88(1). Fortey, R.A. (1975). Early Ordovician trilobite communities. Fossils and Strata, Number 4. Fortey, R.A. (1975). The Ordovician Trilobites of Spitsbergen. II. Asaphidae, Nileidae, Raphiophoridae and Telephinidae of the Valhallfonna Formation. Norsk Polarinstitutt Skrifter, Number 162. Fortey, R.A. (1974). A New Pelagic Trilobite from the Ordovician of Spitsbergen, Ireland and Utah. Palaeontology, Vol.17, Part 1. Frisk, A. (2004). Trilobite biostratigraphy of the Tremadoc Bjorkasholmen Formation on Oland, Sweden. WOGOGOB-2004 Conference Materials. Gendry, D., et al. (2013). Contribution of Morphometrics to the Systematics of the Ordovician Genus Neseuretus (Calymenidae, Trilobita) from the Armorician Massif, France. Journal of Paleontology, 87(3). Gutiérrez-Marco, J.C., et al. (2009). Giant trilobites and trilobite clusters from the Ordovician of Portugal. Geology, Vol.37, Number 5. Hansen, T. (2010). Cyrtometopinid trilobites from the upper Volkhov and lower Lynna Formations (lower Darriwilian) of NW Russia. Bulletin of the Geological Society of Denmark, Vol.58. Hoel, O.A. (2009). The post-cephalic morphology of the middle Ordovician trilobite Prionocheilus narinosus from the central Oslo region, Norway. Norwegian Journal of Geology, Vol.89. Hutchison, R. and J.K. Ingham (1967). New Trilobites from the Tremadoc Series of Shropshire. Palaeontology, Vol.10, Part 1. Jaanusson, V. and L. Ramskold (1993). Pterygometopine Trilobites from the Ordovician of Baltoscandia. Palaeontology, Vol.36, Part 4. Kielan, Z. (1957). On the Trilobite Family Staurocephalidae. Acta Palaeontologica Polonica, Vol.II, Numbers 2-3. Koch, L. (2010). The trilobite fauna from the Ordovician of the Ebbe Anticline (Rhenish Massiv). SDGG-Heft 66, Geotop. MacGregor, A.R. (1963). Upper Llandeilo Trilobites from the Berwyn Hills, North Wales. Palaeontology, Vol.5, Part 4. Mergl, M. (2014). Odontopleurid trilobites of the Katian/Hirnantian boundary interval in the Prague Basin (Bohemia). Bulletin of Geosciences, 89(2). Mergl, M. (2006). Tremadocian Trilobites of the Prague Basin, Czech Republic. Acta Musei Nationalis Pragae, Series B, Historia Naturalis, 62(1-2). Mergl, M., O. Fatka and P. Budil (2008). Lower and Middle Ordovician Trilobite Associations of Perunica: From Shorface Endemicity to Offshore Uniformity (Prague Basin, Czech Republic). In: Advances in trilobite research. Rabano, I, R Gozalo and D. Garcia-Bellido (eds.). Cuadernos del Museo Geominero. Neuman, R.B. and D.L. Bruton (1989). Brachiopods and trilobites from the Ordovician Lower Hovin Group (Arenig/Llanvirn), Holonda area, Trondheim Region, Norway: new and revised taxa and paleogeographic interpretation. Nor.geol.unders.Bull., 414. Owen, A.W. (1981). The trilobite Mucronaspis in the uppermost Ordovician of the Oslo Region, Norway. Norsk Geologisk Tidsskrift, Vol.61. Owen, A.W. and R.A. Heath (1989). A revision of the upper Ordovician trilobite genus Erratencrinurus with a description of a new species from Hadeland. Norsk Geologisk Tidsskrift, Vol.69. Owen, A.W. and J.K. Ingham (1988). The Stratigraphical Distribution and Taxonomy of the Trilobite Onnia in the Type Onnian Stage of the Uppermost Caradoc. Palaeontology, Vol.31, Part 3. Owens, R.M. (1970). The Middle Ordovician of the Oslo Region, Norway 23. The Trilobite Family Proetidae. Norsk Geologisk Tidsskrift, Vol.50. Pärnaste, H. (2006). The Early Ordovician trilobite distribution and zonation of the East Baltic. Proc.Estonian Acad.Sci.Geol., 55(2). Pärnaste, H. (2004). Revision of the Ordovician cheirurid trilobite genus Reraspis with the description of the earliest representative.Proc. Estonian Acad. Sci. Geol., 53(2). Pärnaste, H. and J. Bergström (2014). Lower to Middle Ordovician trilobite faunas along the Ural border of Baltica. Bulletin of Geosciences, 89(2). Pärnaste, H. and A. Popp (2011). First record of Telephina (Trilobita) from the Ordovician of northeastern Estonia and its stratigraphical implications. Estonian Journal of Earth Sciences, 60(2). Pärnaste, H., A. Popp and R.M. Owens (2009). Distribution of the order Proetida (Trilobita) in Baltoscandian Ordovician strata. Estonian Journal of Earth Sciences, 58(1). Price, D. (1977). Species of Tretaspis (Trilobita) from the Ashgill Series in Wales. Palaeontology, Vol.20, Part 4. Price, D. (1974). Trilobites from the Sholeshook Limestone (Ashgill) of South Wales. Palaeontology, Vol.17, Part 4. Rábano, I., et al. (2010). Two more Bohemian trilobites from the Ordovician of Portugal and Morocco. Bulletin of Geosciences, 85(3). Romano, M. (1991). Trilobites from the Ordovician of Portugal. Palaeontology, Vol.34, Part 2. Romano, M. (1990). The Trilobite Protolloydolithus from the Middle Ordovician of North Portugal. Palaeontology, Vol.33, Part 2. Romano, M. (1980). The Trilobite Eccoptochile from the Ordovician of Northern Portugal. Palaeontology, Vol.23, Part 3. Romano, M. and J-L Henry (1982). The Trilobite Genus Eoharpes from the Ordovician of Brittany and Portugal. Palaeontology, Vol.25, Part 3. Romano, M. and A.W. Owen (1993). Early Caradoc Trilobites of Eastern Ireland and Their Palaeogeographical Significance. Palaeontology, Vol.36, Part 3. Rushton, A.W.A. (1988). Tremadoc Trilobites from the Skiddaw Group in the English Lake District. Palaeontology, Vol.31, Part 3. Sadler, P.M. (1974). Trilobites from the Gorran Quartzites, Ordovocian of South Cornwall. Palaeontology, Vol.17, Part 1. Suzuki, Y. (2002). Systematic position and palaeoecology of a cavity-dwelling trilobite, Ityophorus undulatus Warburg, 1925, from the Upper Ordovician Boda Limestone, Sweden. Paleontological Research, Vol.6, Number 1. Suzuki, Y. (2001). Revision of the late Ordovician trilobite Holotrachelus punctillosus (Tornquist, 1884) from Dalarna, Sweden. Acta Palaeontologica Polonica, 46(3). Temple, J.T. (1965). The Trilobite Genus Oedicybele from the Kildare Limestone (Upper Ordovician) of Eire. Palaeontology, Vol.8, Part 1. Tripp, R.P. (1965). Trilobites from the Albany Division (Ordovician) of the Girvan District, Ayrshire. Palaeontology, Vol.8, Part 4. Weir, J.A. (1959). Ashgillian Trilobites from Co. Claire, Ireland. Palaeontology, Vol.1, Part 4. North America Adrain, J.M. (2005). Aulacopleurid Trilobites from the Upper Ordovician of Virginia. Journal of Paleontolgy, 79(3). Adrain, J.M. and S.R. Westrop (2007). The hystricurid trilobite Metabowmania in the Lower Ordovician (Ibexian; Stairsian) of the Great Basin, Utah and Idaho, USA. Memoirs of the Association of Ausralasian Palaeontologists, 34. Adrain,J.M. and S.R. Westrop (2006). Bearriverops, a New Lower Ordovician trilobite genus from the Great Basin, western USA, and classification of the family Dimeropygidae. Can.J.Earth Sci., 44. Adrain, J.M. and S.R. Westrop (2006). A new genus of dimeropygid trilobites from the earliest Ordovician of Laurentia. Acta Palaeontologica Polonica, 51(3). Adrain, J.M. and S.R. Westrop (2005). Lower Ordovician trilobites from the Baumann Fiord Formation, Ellesmere Island, Arctic Canada. Can.J. Earth Sci., 42. Adrain, J.M., N.E.B. McAdams and S.R. Westrop (2009). Trilobite biostratigraphy and revised bases of the Tulean and Blackhillsian Stages of the Ibexian Series, Lower Ordovician, western United States. Memoirs of the Association of Australasian Palaeontologists, 37. Adrain, J.M., et al. (2014). Trilobite biostratigraphy of the Stairsian Stage (upper Tremadocian) of the Ibexian Series, Lower Ordovician, western United States. Memoirs of the Association of Australasian Palaeontologists, 45. Adrain, J.M., et al. (2003). Classification of the Trilobite Subfamilies Hystricurinae and Hintzecurinae Subfam.Nov., With New Genera from the Lower Ordovician (Ibexian) of Idaho and Utah. Memoirs of the Queensland Museum, 48(2). Adrain, J.M., et al. (2001). Systematics of the Ordovician Trilobites Ischyrotoma and Dimeropygiella, With Species from the Type Ibexian Area, Western U.S.A. J.Paleont., 75(5). Brett, C.E., et al. (1999). The Walcott-Rust Quarry: Middle Ordovician Trilobite Konservat-Lagerstätten. J.Paleont.,73(2). Carlucci, J.R. and S.R. Westrop (2012). Trilobite Biofacies Along an Ordovician (Sandbian) Carbonate Buildup to Basin Gradient, Southwestern Virginia. Palaios, Vol.27. Carlucci, J.R., S.R. Westrop and L. Amati (2010). Tetralichine Trilobites from the Upper Ordovician of Oklahoma and Virginia and Phylogenetic Systematics of the Tetralichini. J.Paleont., 84(6). Carlucci, J.R., et al. (2012). A systematic revision of the Upper Ordovician trilobite genus Bumastoides (Illaenidae), with new species from Oklahoma, Virginia and Missouri. Journal of Systematic Palaeontology, Vol.10, Issue 4. Cisne, J.L. (1973). Beecher's Trilobite Bed Revisited: Ecology of an Ordovician Deepwater Fauna. Peabody Museum of Natural History, Postilla Number 160. Farrell, U.C., et al. (2009). Beyond Beecher's Trilobite Bed: Widespread pyritization of soft tissues in the Late Ordovician Taconic foreland basin. Geology, 37. (Thanks to piranha for finding this one!) Fortey, R.A. (1974). A New Pelagic Trilobite from the Ordovician of Spitsbergen, Ireland and Utah. Palaeontology, Vol.17, Part 1. Hall, C.P. (1993). Biometric and Taxonomic Analysis of the Genus Isotelus (Trilobita) from Cincinnatian (Upper Ordovician) Rocks of Ohio, Kentucky and Indiana. Senior Bachelors Thesis - The Ohio State University. (Thanks to doushantuo for finding this one!) Hegna, T.A., M.J. Martin and S.A.F. Darroch (2017). Pyritized in situ trilobite eggs from the Ordovician of New York (Lorraine Group): Implications for trilobite reproductive biology. Geology, Vol.45, Number 3. Hunda, B.R. and N.C. Hughes (2007). Evaluating paedomorphic heterochrony in trilobites: the case of the diminutive trilobite Flexicalymene retrorsa minuens from the Cincinnatian Series (Upper Ordovician), Cincinnati region. Evolution & Development, 9:5. Hunda, B.R., N.C. Hughes and K.W. Flessa (2006). Trilobite Taphonomy and Temporal Resolution in the Mt. Orab Shale Bed (Upper Ordovician, Ohio, U.S.A.). Palaios, Vol.21. Lenz, A.C. and M.Churkin (1966). Upper Ordovician Trilobites from Northern Yukon. Palaeontology, Vol.9, Part 1. Loch, J.D. (2007). Trilobite Biostratigraphy and Correlations of the Kindblade Formation (Lower Ordovician) of Carter and Kiowa Counties, Oklahoma. Oklahoma Geological Survey, Bulletin 149. Ludvigsen, R. and B.D.E. Chatterton (2011). Ordovician Pterygometopidae (Trilobita) of North America. Can.J. Earth Sci., Vol.19(11). McAdams, N.E.B. and J.M. Adrain (2009). New pliomerid trilobite genus Lemureops from the Lower Ordovician (Ibexian, Tulean, Blackhillsian) of western Utah, USA. Memoirs of the Association of Australoasian Palaeontologists, 37. Ross, R.J. (1970). Ordovician Brachiopods, Trilobites and Stratigraphy in Eastern and Central Nevada. U.S. Geological Survey Professional Paper 639. Ross, R.J. (1967). Calymenid and Other Ordovician Trilobites from Kentucky and Ohio. U.S. Geological Survey Professional Paper 583-B. Stitt, J.H. (1983). Trilobites, Biostratigraphy, and Lithostratigraphy of the McKenzie Hill Limestone (Lower Ordovician), Wichita and Arbuckle Mountains, Oklahoma. Oklahoma Geological Survey, Bulletin 134. Swisher, R.E., S.R. Westrop, and L. Amati (2015). The Upper Ordovician trilobite Raymondites Sinclair, 1944 in North America. Journal of Paleontology, 89(1). Taylor, J.D. (1968). An Arkansas Trilobite from Lower Ordovician Rocks. Arkansas Academy of Science Proceedings, Vol.22. Taylor, M.E. and R.B. Halley (1974). Systematics, Environment and Biogeography of Some Late Cambrian and Early Ordovician Trilobites from Eastern New York State. U.S. Geological Survey Professional Paper 834. Tremblay, J. (1989). Middle Ordovician (Whiterockian-Chazyan) Trilobites from the Sunblood Formation, District of Mackenzie. Masters Thesis - Brock University. Tripp, R.P. and W.R. Evitt (1986). Silicified Trilobites of the Family Asaphidae from the Middle Ordovician of Virginia. Palaeontology, Vol.29, Part 4. South/Central America/Caribbean Buitron, B.E. and E. Almazan-Vazquez (2007). Lithostratigraphy and the Early Ordovician Trilobite Ectenonotus westoni (Billings) from Las Norias Ranch, Sonora State, Mexico. In: 4th European Meeting on the Palaeontology and Stratigraphy of Latin America. Diaz-Martinez, E. and I. Rabano, eds. Edgecombe, G.D., et al. (1997). Ontogeny of the Proetoid Trilobite Stenoblepharum, And Relationships of a New Species from the Upper Ordovician of Argentina. J.Paleont., 71(3). Vaccari, N.E., et al. (2006). New raphiophorid trilobites from the Ordovician of Argentina and their biogeographic implications. Memoirs of the Association of Australasian Palaeontologists, 32. General Ordovician Trilobites Order Agnostida Bruton, D.L. and H.A. Nakrem (2005). Enrolment in a Middle Ordovician agnostoid trilobite. Acta Palaeontologica Polonica, 50(3). Order Asaphida Darby, D.G. and E.C. Stumm (1965). A Revision of the Ordovician Trilobite Asaphus platycephalus Stokes.Contributions from the Museum of Paleontology - The University of Michigan, Vol.XX, Number 3. Shiino, Y., et al. (2014). Pelagic or benthic? Mode of life of the remopleuridid trilobite Hypodicranotus striatulus. Bulletin of Geosciences, 89(2). Tanaka, G., et al. (2015). Vision in a Middle Ordovician trilobite eye. Palaeogeography, Palaeoclimatology, Palaeoecology, 433. Whitworth, P.H. (1969). The Tremadoc Trilobite Pseudokainella impar (Salter). Palaeontology, Vol.12, Part 3. Order Corynexochida Adrain, J.M., T.S. Karim and S.R. Westrop (2014). The Early Ordovician (Floian) bathyurid trilobite genera Jeffersonia, Cullisonia and Bathyurina. Memoirs of the Association of Australasian Palaeontologists, 45. Fortey, R.A. (1988). The Ordovician Trilobite Hadrohybus Raymond 1925, and Its Family Relationships. Peabody Museum of Natural History, Postilla Number 202. Order incerti ordinis Adrain, J.M., T.S. Karim and S.R. Westrop (2014). The Early Ordovician (late Tremadocian; Stairsian) dimeropygid trilobite Pseudohystricurus Ross. Memoirs of the Association of Australasian Palaeontologists, 45. Order Phacopida Congreve, C.R. and B.S. Lieberman (2008). Phylogenetic and Biogeographic Analysis of Ordovician Homalonotid Trilobites. The Open Paleontology Journal, 1. Peers, S. (1997). The Taxonomy, Phylogeny and Palaeobiogeography of the Trilobite Families Pliomeridae and Encrinuridae: Reconstructing the Ordovician world using evolving lineages. Volume 1 and Volume 2 together. Ph.D. Thesis - University of Glasgow. (49MB download) Tripp, R.P. (1957). The Trilobite Encrinurus multisegmentatus (Portlock) and Allied Middle and Upper Ordovician Species.Palaeontology, Vol.1, Part 1. Tunnicliff, S.P. (1978). Types of the Ordovician Trilobites Celtencrinurus multisegmentatus (Portlock) and Cryptolithus latus Portlock. Palaeontology, Vol.21, Part 2. Order Proetida McCormick, T. and R.A. Fortey (2002). The Ordovician Trilobite Carolinites, A Test Case for Microevolution in a Macrofossil Lineage. Palaeontology, Vol.45, Part 2. Order Redlichiida Fortey, R.A. (2000). Olenid trilobites: The oldest known chemoautotrophic symbionts? PNAS, Vol.97, Number 12. General Ordovician Trilobites Adrain, J.M. (2013). Chapter 20. A synopsis of Ordovician trilobite distribution and diversity. In: Early Palaeozoic Palaeobiogeography and Palaeogeography. Harper, D.A.T. and T. Servais (eds.), Geological Society London, Memoirs, 38. Whittington, H.B. and C.P. Hughes (1973). Ordovician Trilobite Distribution and Geography. Special Papers in Palaeontology, Number 12.
  13. Dipleura Cephalon from Madison CO., NY.

    From the album Middle Devonian

    Dipleura dekayi (trilobite cephalon) Middle Devonian Skaneateles Formation Delphi Member Hamilton Group Cole Hill Road Quarry North Brookfield, NY.
  14. Today I took a quick ride to the small suburb of Evanston, right out side of Chicago. This is the home of Dave's Down To Earth Rock Shop and Prehistoric Life Museum. If memory serves me correct, Dave's has been in Evanston for the past 40+ years and it is a family owned business. Dave's recently moved to it's new home on Main Street and if you every get a chance to be in the Chicago area, this is a must see- you will definitely not be disappointed. From the outside, you would not believe that this store has a museum that houses such a great variety of fossil life and the most extensive collection / variety of Mazon Creek fauna that I have ever seen, including 3 Holotype Mazon Creek fossils named after Dave and his parents who found them. Here are some overview pictures of the Museum. Here are some overview of the various displays.
  15. Drotops Megalomanicus

    Drotops Megalomanicus found it mislabeled and under priced at the mall today at a random booth, was a very unexpected pleasure measures somewhere around 5.3-5.4 inches, the condition is not to bad.
  16. Hi! I would like to exchange these fossils for Miocene material or Mesozoic/Cenozoic echinoids/corals. Unfortunately, I can only trade with european members. 1-Mosasaur teeth;spinosaur tooth;otodus obliquus tooth (if you need more info, please pm me).
  17. Could anyone show me how to tell Eldredgeia venustus from Eldredgeia eocryphaeus in these specimens?
  18. Seven stars pa

    Bugs and more. If anyone can give specifics on what we found it would be great. This was a first time experience for my girlfriend and she found a nice curled bug she worked out of the rock.
  19. S.S. White Airbrasive

    I picked up this Airbrasive model H from a machine shop the other day for a decent price. The shop still had it in production and it seems to have been taken care of pretty well. Can anyone tell me how old it might be? Also looking for a manual if any of you S.S. White users know where I can locate one. Looks like the vibrator has been replaced and everything seems to work on it. I'm thinking the hand piece should be replaced with something else but not quite sure where I want to get that. I typically use dolomite (44u crystal mark) on the shale I collect from the Maquoketa formation of N.E. Iowa. Any advice or tips on this unit would be greatly appreciated! Thanks.
  20. Trip to a new (to me) site

    A friend gave me directions to a locality in Huntingdon/Centre County PA. This is a excavation in the Lower Member of the Ordovician Reedsville Shale (possibly now called the Antes Shale). There were lots of Bryzooians, a variety of shells some with pyrite coatings, trilobites, and crinoid stem pieces. Most all of the fossils seemed to be casts/molds. The shale is so fissile that it was difficult to collect anything whole!I can't wait to get back and sped some time doing some actual digging & splitting though Wednesday was a beautiful day to spend in the woods. I probably would have collected more but kept getting distracted by the 3 or 4 kinds of butterflies flitting around. The last two photos show things that I'm not sure what they are. The circled item is on a small plate almost covered with bryzooians.
  21. Is This New York Trilobite Id'able?

    Hello, this trilobite was found in rock from somewhere upstate new york. It was an interesting shape different from what I have found before but it is very worn to tell exactly what it is to my knowledge, is it to broken up to id? If not I'll let the new york trilobite experts here take this one. The trilo measures a little over an inch.
  22. Looking for trilobites

    Hi. I live in Michigan, and am considering driving 5 hours to Waynesville, Ohio and the Caesar Creek State Park, where I hear that people have found trilobite fossils. I've also heard that by this time of the year, the fields have been picked over pretty well, and to wait until the spring, when the freezing and thaw may unearth more specimens. Anyone have a thought on this?
  23. Books for a beginner

    Hi there, I'd like to learn more about paleontology and was wondering which books would you recommend for a beginner? I'm looking for books on ammonites, trilobites and dinosaur paleobiology. Also are there any books on Ankylosaurids around? Thank you for your help. There are so many books I don't know where to start. Jojo
  24. Silurian trilobite

    Hi, I recently found this in the Wenlockian Sugar Run formation in Illinois. I'm guessing it is a Dalmanites pygidium, but not sure. It has some interesting ornamentation. Any ideas?
  25. Currently slimming down the collection and offloading some excess trilobites to make room for others. Looking for Ordovician or Devonian trilobites I don't yet have. Pictured here are three Devonian bugs, of which I have numerous examples. These are not rare specimens, but ideal for those who want a specimen example from areas that they cannot collect from, and who cannot necessarily afford museum quality examples. Left: A mostly complete Greenops widderensis from the Widder Formation, Middle Devonian. Ideal for prep practice. Right: Pygidium of the dalmanatid Anchiopsis anchiops. Thorax is rarely found, and complete ones are as scarce as hen's teeth. Bois Blanc Fm, Lower Devonian. Bottom: Prep practice delight. Complete semi-prone Eldredgeops rana with pygidium tucked underneath. Windom shale of PD, Middle Devonian. I can entertain more than one trade offer as I do have other examples of these I can part with. * Shipping within North America preferred. * I reserve the "right" to pad the trade package you'll receive with other assorted Devonian items. I like to add bonus stuff.
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