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Found 751 results

  1. Trilobite ID

    I found this in my usual rip rap spot, which has a maddening mix of formations (from Bois Blanc, Amherstburg, Dundee, and even some Hamilton Gp formations, too - yargh). My first instinct with this one was Anchiops anchiopsis, but there is something not quite right about this one. It is tough to make out if there is a pygidial spike for one, I cannot make out any incised axial rings, and it does not have the same acute angle of pleural tapering I usually see with this species. There appears to be a border on the lower left of the pygidium, and the pleura seem to stretch out quite widely while the axial part is quite thin (reminiscent of Coronura aspectans). Is this something else, or just another Anchiops that is simply freakish? I made a minor attempt to reveal more of it. Trilobites in this matrix do not preserve particularly well.
  2. Trilobites are common in Northern Africa and prolific in Morocco but are scarce and very hard to find in the Middle East. Despite their rarity, extensive fieldtrips in Jordan to promissing localities proved worthwhile, we literally managed to find the first articulated trilobites in the Middle East in early mid Cambrian outcrops. Following is a link to the video I made documenting fieldtrips to the beautiful locality and some of the finds, enjoy.
  3. when i was surfing over the internet i found this beautifull phacops. but i don't know a lot about these things. so does anyone know if this is real. i saw this other trilobite, it's from the same seller, but the tail looks a bit fishy. thats why i just wanted to know if the other one is real too. this is the fishy one, the tail doesn't look right.
  4. I have a hypothesis

    Over a month ago I found what I believe is my first hypostome near House Springs, Missouri. But it is much larger than the other trilobite pieces that I have found in the area. Since then I have been to the same roadcut and found what I believe to be two larger trilobite tails that might be something like Isotelus which may be the source of the hypostome. I just want other people's opinions if they think I'm on the track.
  5. 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
  6. Milwaukee

    What spots in Milwaukee would be good for hunting fossils? I'm taking 2 older boys with me as my lil son and wife will have to stay at hospital overnight.... any spots? My oldest son is interested in try to find trilobites.... thank you.
  7. Trilobite or brachiopod?

    Brought my son fossil hunting today up in schoharie ny and he found something that sort of resembles a trilobite.
  8. Hello, I am actualy working on a 3 D reconstruction of the Trilobite Triarthrus The body and my references as a blueprint :
  9. I obtained a rather attractive triobite today (my first one) but knowing that these fossils are often tampered with to some degree or another, I decided to put a little acetone on it to see if I could expose any restoration or remove any coatings that may have been applied (I want it for macro photography purposes, and coatings would ruin that). I covered it in acetone, left it for a few minutes, then rinsed it off. Now, instead of being jet black like it was originally, it looks silvery grey - like this: Of all the things I expected, it turning grey wasn't one of them. I thought black or brown were the natural colours. I don't really think the whole trilobite can be a fake, because for one thing it's too flawed, and for another the eyes have the tiny, tiny lenses. Have I just impacted upon a coating without removing it, or what? Any suggestions welcome!
  10. Just got this Russian trilobite in the mail. I haven't done any fossil prep before, but am really excited to get started. I tested the matrix with a pin and it feels fairly soft, I think a lot softer than the fossil. Right now I just have hand tools, but I do have an air abrasive machine coming in the mail. I haven't used one before though, so I don't want to start on this one. I do have an identical trilobite all prepped already, so it will serve as a good anatomical reference. My thought is to remove all the rock above the trilobite and use the longer side of matrix (left side in first pic) as a base (cutting it level to stand on). Not quite sure how to approach removing the large amount of rock. Once I get down to the trilobite I feel a little more confident.
  11. Hello All, I’ve acquired some specimens of the species Ductina vietnamica, a blind phacopid trilobite from the Devonian of China and Vietnam. These specimens, dating to the Eifelian age of China, are fairly well preserved for the often-flattened and disarticulated type. Ductina was a rather successful phacopid, being recorded throughout most of the Devonian. They are small (my examples range between 1/2 an inch to 1.2 inches), with a simple effaced pygidum and a cephalon lacking many features (such as tubercles) found in its fellow trilobites of the Family Phacopidae. Most noticeably, Ductina is blind. Blindness is a trend in several groups of trilobites, but was also present in the relatives of the well-known Eldredgeops. This secondary blindness has often been interpreted as relating to the environmental conditions that the benthic trilobites faced (Clarkson, 1967). Taxonomy: Class: Trilobita Order: Phacopida Suborder: Phacopina Superfamily: Phacopoidea Family: Phacopidae Genus: Ductina Species: D. vietnamica Location Information: Country: China Province: Guangxi Formation: Unknown Here are some photos showing the details: A photo of the most complete specimen. There is some damage on the fragile pleurae, but for the most part, it is complete. This one is about 3/4 of an inch long. Close-up of the glabella and thorax of a red example. This one shows glabellar furrows that are absent in many examples. The pleurae are also in good shape. Citations: Clarkson, Euan. (1967). Environmental significance of eye reduction in trilobites and Recent arthropods. Marine Geology - MAR GEOLOGY. 5. 367-375. 10.1016/0025-3227(67)90046-1.
  12. Fall Break in Sulphur

    Hi! This teacher is spending the last day of Fall Break Christmas shopping - fossils for my students! Found a few beauties for teacher, too... I think this may be part of a trilobite... thoughts? More pics in comments of other mystery finds as I find them! Thanks in advance!
  13. Agnostids

    From the album Adam's Collection.

    Agnostid Trilobite Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Agnostida Family: Ptychagnostidae Genus: Ptychagnostus Species: gibbus Author Citation Linnarsson 1869 Geological Time Scale Eon: Phanerozoic Era: Paleozoic Period: Cambrian Epoch: Middle Stratigraphy St Davids Sediments Biostratigraphy Paradoxides Series Provenance Acquired by: Purchase/Trade Location Road cutting, 300 m S.W. of Cement works. Slammerstad, Oslo Norway Listed as St.David's, Paradoxides Series. About 505 million years old.
  14. 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 Subphylum Trilobitomorpha Class Trilobita Cambrian Trilobites Africa/Middle East Ameri, H. (2013). Peri-Gondwana Late Early-Middle Cambrian trilobites from the Kuhbanan Formation in Dahu section, Kernan Province, Iran. Arab J. Geosci., 8(3). Ameri, H. and F. Zemani (2015). Biostratigraphy of the Peri-Gondwana Cambrian trilobite fauna (Northern Kernan, Iran) and correlation with other countries. Historical Biology, 28(3). Ameri, H. and M. Dastanpour (2010). Stratigraphy and Paleontology of Trilobites in Kuhbanan Formation in the Akbar-Abad Section (North of Kerman). Journal of Sciences, Islamic Republic of Iran, 21(1). Dean, W.T. (2006). Cambrian Stratigraphy and Trilobites of the Samur Dağ Area, South of Hakkâri, Southeastern Turkey. Turkish Journal of Earth Sciences, Vol.15. Dean, W.T. (2005). Trilobites from the Cal Tepe Formation (Cambrian), 1 Near Seydisahir, Central Taurides, Southwestern Turkey. Turkish Journal of Earth Sciences, Vol.14. Dean, W.T. and R. Krummenacher (1961). Cambrian Trilobites from the Amanos Mountains, Turkey. Palaeontology, Vol.4, Part 1. Elicki, O. and G. Geyer (2013). The Cambrian trilobites of Jordan: taxonomy, systematic and stratigraphic significance. Acta Geologica Polonica, Vol.63, Number 1. Antarctica Cooper, R.A., J.B. Jago and J.G. Begg (1996). Cambrian trilobites from Northern Victoria Land, Antarctica, and their stratigraphic implications. New Zealand Journal of Geology and Geophysics, Vol.39. Jago, J.B. and R.A. Cooper (2007). Middle Cambrian trilobites from Reilly Ridge, northern Victoria Land, Antarctica. Memoirs of the Association of Australasian Palaeontologists, 34. Liebermann, B.S. (2004). Revised Biostratigraphy, Systematics, and Paleobiogeography of the Trilobites from the Middle Cambrian Nelson Limestone, Antarctica. The University of Kansas Paleontological Contributions, Number 14. Palmer, A.R. and C.G. Gatehouse (1972). Early and Middle Cambrian Trilobites from Antarctica. U.S. Geological Survey, Professional Paper 456-D. Shergold, J.H. and R.A. Cooper (1985). Late Cambrian trilobites from the Mariner Group, northern Victoria Land, Antarctica. BMR Journal of Australian Geology & Geophysics, 9. Asia/Malaysia/Pacific Islands Dai, T. and X.-L. Zhang (2012). Ontogeny of the trilobite Estaingia sinensis (Chang) from the lower Cambrian of South China. Bulletin of Geosciences, 87(1). Hughes, N.C., et al. (2005). Cambrian biostratigraphy of the Tal Group, Lesser Himalaya, India, and early Tsanglangpuan (late early Cambrian) trilobites from the Nigali Dhar syncline. Geol.Mag., 142(1). Jell, P.A. and N.C. Hughes (1997). Himalayan Cambrian Trilobites. Special Papers in Palaeontology, Number 58. Kobayashi, T. (1986). A Comparison of the Cambrian Trilobites between the North and South Sides of the Western Pacific Basin. Proc. Japan Acad., Series B, Vol.62, Number 8. Li, G.-X., et al. (2012). Early Cambrian eodiscoid trilobite Hupeidiscus orientalis from South China: ontogeny and implications for affinities of Mongolitubules-like sclerites. Bulletin of Geosciences, 87(1). Liu, Q., Q. Lei and Q. Ou (2011). Ventral exoskeleton morphology of the trilobite Neodrepanura premesnili from the Cambrian Kushan Formation, Shandong, China. Bulletin of Geosciences, 86(3). McKenzie, N.R., et al. (2011). Trilobites and zircons link north China with the eastern Himalaya during the Cambrian. Geology, 39. Ou, Q., et al. (2009). A Juvenile Redlichiid Trilobite Caught on the Move: Evidence from the Cambrian (Series 2) Chengjiang Lagerstatte, Southwestern China. Palaios, Vol.24. Peng, S., X. Yang and N.C. Hughes (2008). The Oldest Known Stalk-Eyed Trilobite, Parablackweldaria Kobayashi, 1942 (Damesellinae, Cambrian), and its Occurrence in Shadong, China. J.Paleont., 82(4). Peng, S., L.E. Babcock and H. Lin (2001). Illustrations of Polymeroid Trilobites from the Huaqiao Formation (Middle-Upper Cambrian), Paibi and Wangcun Sections, Northwestern Hunan, China. Palaeoworld, Number 13. (Thanks to Oxytropidoceras for finding this one!) Peng, S., et al. (2009). Cambrian Trilobites from the Parahio and Zanskar Valleys, Indian Himalaya. The Paleontological Society. Shah, S.K., S.K. Parcha and A.K. Raina (1991). Late Cambrian Trilobites from Himalaya. Journal of the Palaeontological Society of India, Vol.36. Shen, C., et al. (2014). Development and trunk segmentation of early instars of a ptychopariid trilobite from Cambrian Stage 5 of China. Scientific Reports, 4: 6970. Singh, B.P. (2013). Additional Late Middle Cambrian Trilobites from Karsha Formation (Haimanta Group) Zanskar Region of Zanskar-Spiti Basin, Northwest Himalaya. Journal Geological Society of India, Vol.81. Singh, B.P., et al. (2016). Revision of the Diagnostic Features of the Trilobite Genus Bhargavia (Ellipsocephaloidea) from the Parahio Valley (Spiti), Northwest Himalaya, India. Journal of the Palaeontological Society of India, Vol.61(1). Singh, B.P., et al. (2016). The Cambrian trilobite fauna from the Shian (Saybang) section Pin Valley (Spiti) and its biostratigraphic significance. Palaeoworld, xxx. (Article in Press) Singh, B.P., et al. (2016). Trilobite fauna of basal Cambrian Series 3 (Stage 5) from the Parahio Valley (Spiti), Northwest Himalaya, India, and its biostratigraphic significance. Annales de Paleontologie, 102. Singh, B.P., et al. (2014). Yuehsienszella (Cambrian Series 2) Trilobite from the Parahio Valley, Spiti Region (Zanskar-Spiti Sub-Basin), India and its Biostratigraphic Significance. Journal of the Palaeontological Society of India, Vol.59(1). Sundberg, F.A., et al. (2011). Detailed trilobite biostratigraphy across the proposed GSSP for Stage 5 ("Middle Cambrian" boundary) at the Wuliu-Zengjiayan section, Guizhou, China. Bulletin of Geosciences, 86(3). Zhang, X.-G. (1989). Ontogeny of an Early Cambrian eodiscoid trilobite from Henan, China. Lethaia, Vol.22. Zhang, X.-G. and E.N.K. Clarkson (1993). Ontogeny of the Eodiscid Trilobite Shizhudiscus longquanensis from the Lower Cambrian of China. Palaeontology, Vol.36, Part 4. Zhang, X.-G., D. Fu and T. Dai (2012). A new species of Kangacaris (Arthropoda) from the Chengjiang lagerstätte, lower Cambrian, southwest China. Alcheringa, 36. Australia/New Zealand Henderson, R.A. (1976). Upper Cambrian (Idamean) Trilobites from Western Queensland, Australia. Palaeontology, Vol.19, Part 2. Jago, J.B. (1976). Late Middle Cambrian Agnostid Trilobites from North-Western Tasmania. Palaeontology, Vol.19, Part 1. Jago, J.B. (1972). Two New Cambrian Trilobites from Tasmania. Palaeontology, Vol.15, Part 2. Jago, J.B. and A.V. Brown (2001). Late Middle Cambrian Trilobites from Trial Ridge, Southwestern Tasmania. Papers and Proceedings of the Royal Society of Tasmania, Vol.135. Jago, J.B. and B. Daily (1974). The Trilobite Clavagnostus Howell from the Cambrian of Tasmania. Palaeontology, Vol.17, Part 1. Jell, P.A. and R.A. Robison (1978). Revision of a Late Middle Cambrian Trilobite Faunule from Northwestern Queensland. The University of Kansas Paleontological Contributions, Paper 90. Paterson, J.R. and G.A. Brock (2007). Early Cambrian Trilobites from Angorichina, Flinders Ranges, South Australia, With a New Assemblage from the Pararaia bunyerooensis Zone. J.Paleont., 81(1). Paterson, J.R. and G.D. Edgecombe (2006). The Early Cambrian Trilobite Family Emuellidae Pocock, 1970: Systematic Position and Revision of Australian Species. J.Paleont., 80(3). Paterson, J.R., et al. (2007). Taphonomy and palaeoecology of the emuellid trilobite Balcoracania dailyi (early Cambrian, South Australia). Palaeogeography, Palaeoclimatology, Palaeoecology, 249(3-4). Pocock, K.J. (1970). The Emuellidae, a New Family of Trilobites from the Lower Cambrian of South Australia. Palaeontology, Vol.13, Part 4. Pocock, K.J. (1964). Estaingia, New Trilobite Genus from the Lower Cambrian of South Australia. Palaeontology, Vol.7, Part 3. 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). Shergold, J.H. (1971). Late Upper Cambrian Trilobites from the Gola Beds, Western Queensland. Commonwealth of Australia, Department of National Development, Bureau of Mineral Resources, Geology and Geophysics, Bulletin 112. Wang, Q., et al. (1989). Upper Cambrian (Mindyallan) trilobites and stratigraphy of the Kayrunnera Group, western New South Wales. BMR Journal of Australian Geology & Geophysics, 11. Webby, B.D., Q. Wang, and K.J. Mills (1988). Upper Cambrian and Basal Ordovician Trilobites from Western New South Wales. Palaeontology, Vol.31, Part 4. Whitehouse, F.W. (1939). The Cambrian Faunas of North-Eastern Australia. Part 3: The Polymerid Trilobites. University of Queensland Papers, Department of Geology, Vol.1 (New Series), Number 7. Europe (including Greenland and Siberia) Aceñolaza, G.F., et al. (2014). First Farongian (Late Cambrian) trilobites from the Cantabrian Zone (north-western Spain). Bulletin of Geosciences, 89(2). Ahlberg, P. (1980). Early Cambrian trilobites from northern Scandinavia. Norsk Geologisk Tidsskrift, Vol.60. Ahlberg, P., et al. (2005). Phosphatised olenid trilobites and associated fauna from the Upper Cambrian of Vastergotland, Sweden. Acta Palaeontologica Polonica, 50(3). Alvaro, J.J., et al. (2004). Some solenopleurine trilobites from the Languedocian (Late Mid Cambrian) of Western Europe. Geobios, 37. Axheimer, N., P. Ahlberg and P. Cederstrom (2007). A new lower Cambrian eodiscoid trilobite fauna from Swedish Lapland and its implications for intercontinental correlations. Geol.Mag., 144(6). Bushuev, E., I. Goryaeva and V. Pereladov (2014). New discoveries of the oldest trilobites Profallotaspis and Nevadella in the northeastern Siberian Platform, Russia. Bulletin of Geosciences, 89(2). Cowie, J. and K.J. McNamara (1978). Olenellus (Trilobita) from the Lower Cambrian Strata of North-West Scotland. Palaeontology, Vol.21, Part 3. Dies-Alvarez, M.E., E. Linan and R. Gozalo (2007). The Cambrian genus Onaraspis Opik, 1968 (Trilobita) in Spain. Memoirs of the Association of Australasian Palaeontologists, 34. Esteve, J. (2014). Intraspecific variability in paradoxidid trilobites from the Purujosa trilobite assemblage, (middle Cambrian, northeast Spain). Acta Palaeontologica Polonica, 59(1). Esteve, J. and S. Zamora (2014). Enrolled agnostids from Cambrian of Spain provide new insights about the mode of life in these forms. Bulletin of Geosciences, 89(2). Fatka, O., M. Szabad and P. Budil (2009). Malformed agnostids from the Middle Cambrian Jince Formation of the Příbram-Jince Basin, Czech Republic. Bulletin of Geosciences, 84(1). Fatka, O., et al. (2008). Exoskeletal Configurations of Cambrian and Ordovician Agnostids: Examples from the Barrandian Area of Czech Republic. In: Advances in trilobite research. Rabano, I., R. Gozalo and D. Garcia-Bellido (eds.). Gil Cid, M.D. and J.B. Jago (1989). New Data on the Lower Cambrian Trilobites of Cortijos De Malagon (Spain). Estudios geol., 45. Kordule, V. (2006). Ptychopariid trilobites in the Middle Cambrian of Central Bohemia (taxonomy, biostratigraphy and synecology). Bulletin of Geosciences, 81(4). Lagebro, L., M. Stein and J.S. Peel (2009). A New ?Lamellipedian Arthropod from the Early Cambrian Sirius Passet Fauna of North Greenland. J.Paleont., 83(5). Laibl, L., et al. (2014). Early ontogeny of the Cambrian trilobite Sao hirsuta from the Skryje-Týřovice Basin, Barrandian area, Czech Republic. Bulletin of Geosciences, 89(2). Linan, E., M.E. Dies and R. Gozalol (2003). A Review of the Genus Kingaspis (Trilobita, Lower Cambrian) from Spain and its Biostratigraphical Consequences for Correlation in the Mediterranean Subprovince. Revista Espanola de Paleontologia, 18(1). Lopez-Villalta, J.S. (2016). Self-regulation of trilobite diversity in Murero (Middle Cambrian, Spain) due to compensatory extinction. Geologica Acta, Vol.14, Number 1. McNamara, K.J. (1978). Paedomorphosis in Scottish Olenellid Trilobites (Early Cambrian). Palaeontology, Vol.21, Part 3. Naimark, E., Y. Shabanov and I. Korovnikov (2011). Cambrian trilobite Ovatoryctocara Tchernysheva, 1962 from Siberia. Bulletin of Geosciences, 86(3). Nikolaisen, F. and G. Heningsmoen (1987). Lower and Middle Cambrian trilobites from the Digermul peninsula, Finnmark, Northern Norway. Nor.geol.unders.Bull., 419. Orlowski, S. (1985). Lower Cambrian and its trilobites in the Holy Cross Mts. Acta Geologica Polonica, Vol.35, Numbers 3-4. Orlowski, S. (1975). Lower Cambrian trilobites from Upper Silesia (Goczalkowice borehole). Acta Geologica Polonica, Vol.25, Number 3. Pegel, T.V. (2014). Biofacies and age of Cambrian trilobite associations of the Diringde reef complex (northern Siberian Platform, Russia). Bulletin of Geosciences, 89(2). Pillola, G.L. (1993). The Lower Cambrian Trilobite Bigotina and Allied Genera. Palaeontology, Vol.36, Part 4. Radwanski, A. and P. Roniewicz (1963). Upper Cambrian Trilobite Ichnocoenosis from Wielka Wisniowka (Holy Cross Mountains, Poland). Acta Palaeontologica Polonica, Vol.VIII, Number 2. Robison, R.A. (1984). Cambrian Agnostida of North America and Greenland, Part I. Ptychagnostidae. The University of Kansas Paleontological Contributions, Paper 109. Rushton, A.W.A. and T. Weidner (2007). The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jamtland, central Sweden. Acta Geologica Polonica, Vol.57, Number 4. Rushton, A.W.A., et al. (2007). A new mid-Cambrian trilobite fauna from Shropshire. Proceedings of the Geologists' Association, 118. Shergold, J.H., R. Feist and D. Vizcaino (2000). Early Late Cambrian Trilobites of Australo-Sinian Aspect from the Montagne Noire, Southern France. Palaeontology, Vol.43, Part 4. Shergold, J.H., E. Linan, and T. Palacios (1983). Late Cambrian Trilobites from the Najerilla Formation, North-Eastern Spain. Palaeontology, Vol.26, Part 1. Smith, J.D.D. and D.E. White (1963). Cambrian Trilobites from the Purley Shales of Warwickshire. Palaeontology, Vol.6, Part 3. Strand, T. (1927). The Ontogeny of Olenus gibbosus. Norsk Geol.Tidsskr., IX. Terfelt, F. (2003). Upper Cambrian trilobite biostratigraphy and taphonomy at Kakeled on Kinnekulle, Vastergotland, Sweden. Acta Palaeontologica Polonica, 48(3). Vizcaïno, D., J.J. Álvaro and É. Monceret (2004). Trilobites and ichnofossils from a new fossil Lagerstätte in the Lower Cambrian Pardailhan Formation, southern Montagne Noire, France. Geobios, 37. Weidner, T. and J.O.R. Ebbestad (2014). The early middle Cambrian agnostid Pentagnostus praecurrens (Westergard 1936) from Sweden. Memoirs of the Association of Australasian Palaeontologists, 45. Weidner, T. and A.T. Nielsen (2010). Yuepingia? sp., a ceratopygid trilobite from the upper Cambrian (Furongian) of Scandinavia. Bulletin of the Geological Society of Denmark, Vol.58. Westergard, A.H. (1949). Non-Agnostidean Trilobites of the Middle Cambrian of Sweden. Sveriges Geologiska Undersokning, Vol.43, Number 9. Westergard, A.H. (1947). Supplementary Notes on the Upper Cambrian Trilobites of Sweden. Sveriges Geologiska Undersokning, Vol.41, Number 8. Whittington, H.B. (1958). The Ontogeny of the Trilobite Peltura scarabaeoides from Upper Cambrian, Denmark. Palaeontology, Vol.1, Part 3. Whitworth, P.H. (1970). Ontongeny of the Upper Cambrian Trilobite Leptoplastus crassicornis (Westergaard) from Sweden. Palaeontology, Vol.13, Part 1. Zamora, S., et al. (2011). Exoskeletal abnormalities in paradoxidiid trilobites from the Cambrian of Spain, and a new type of bite trace. Bulletin of Geosciences, 86(3). (Thanks to piranha for finding this one!) Zylinska, A. (2002). Stratigraphic and biogeographic significance of Late Cambrian trilobites from Lysogory (Holy Cross Mountains, central Poland). Acta Geologica Polonica, Vol.52, Number 2. Zylinska, A. (2001). Late Cambrian trilobites from the Holy Cross Mountains, central Poland. Acta Geologica Polonica, Vol.51, Number 4. Zylinska, A. and Z. Szczepanik (2009). Trilobite and acritarch assemblages from the Lower-Middle Cambrian boundary interval in the Holy Cross Mountains (Poland). Acta Geologica Polonica, Vol.59, Number 4. North America Adrain, J.M. and S.R. Westrop (2005). Late Cambrian ptychaspidid trilobites from western Utah: implications for trilobite systematics and biostratigraphy. Geol. Mag., 142(4). Adrain, J.M., S.E. Peters and S.R. Westrop (2009). The Marjuman trilobite Cedarina Lochman: thoracic morphology, systematics, and a new species from western Utah and eastern Nevada, USA. Zootaxa, 2218. Boyce, W.D. (1987). Cambrian - Ordovician Trilobite Biostratigraphy in Central Newfoundland. Current Research, Newfoundland Department of Mines and Energy, Mineral Development Division, Report 87-1. Burton Longacre, S.A. (1968). Trilobites of the Upper Cambrian Ptychaspid Biomere, Wilburns Formation, Central Texas. Ph.D. Dissertation - The University of Texas at Austin. Corbacho, J. and F.J. Lopez-Soriano (2013). Gabriellus kierorum: a new species of Judomiidae from the lower Cambrian (Series 2) of Canada. Batalleria, 19. Foster, J.R. (2011). Bonnima sp. (Trilobita; Corynexochida) from the Chambless Limestone (Lower Cambrian) of the Marble Mountains, California: First Dorypygidae in a cratonic region of the southern Cordillera. PaleoBios, 30(2). Fritz, W.H. (1968). Lower and Early Middle Cambrian Trilobites from the Pioche Shale, East-Central Nevada, U.S.A. Palaeontology, Vol.11, Part 2. Geyer, G. and E. Landing (2001). Middle Cambrian of Avalonian Massachusetts: Stratigraphy and Correlation of the Braintree Trilobites. J.Paleont., 75(1). Kim, D.H., S.R. Westrop and E. Landing (2002). Middle Cambrian (Acadian Series) Conocoryphid and Paradoxidid Trilobites from the Upper Chamberlain's Brook Formation, Newfoundland and New Brunswick. J.Paleont., 76(5). Lerosey-Aubril, R., et al. (2012). Controls on Gut Phosphatisation: The Trilobites from the Weeks Formation Lagerstatte (Cambrian; Utah). PLoS ONE, 7(3). Longacre, S.A.B. (1968). Trilobites of the Upper Cambrian Ptychaspid Biomere, Wilberns Formation, Central Texas. Ph.D. Dissertation - The University of Texas at Austin. (76.8MB download) Palmer, A.R. (1968). Cambrian Trilobites of East-Central Alaska. U.S. Geological Survey Professional Paper 559-B. (158 pages) Palmer, A.R. (1965). Trilobites of the Late Cambrian Pterocephaliid Biomere in the Great Basin, United States. U.S. Geological Survey Professional Paper 493. (154 pages) Palmer, A.R. (1964). An Unusual Lower Cambrian Trilobite Fauna from Nevada. U.S. Geological Survey Professional Paper 483-F. Palmer, A.R. (1962). Glyptagnostus and Associated Trilobites in the United States. U.S. Geological Survey Professional Paper 374-F. Palmer, A.R. (1960). Trilobites of the Upper Cambrian Dunderberg Shale, Eureka District, Nevada. U.S. Geological Survey Professional Paper 334-C. Palmer, A.R. (1954). An Appraisal of the Great Basin Middle Cambrian Trilobites Described Before 1900. U.S. Geological Survey Professional Paper 264-D. Pratt, B.R. and J.W.F. Waldron (1991). A Middle Cambrian trilobite faunule from the Meguma Group of Nova Scotia. Can.J. Earth Sci., Vol.28. Robison, R.A. (1984). New Occurrences of the Unusual Trilobite Naraoia from the Cambrian of Idaho and Utah. The University of Kansas Paleontological Contributions, Paper 112. Robison, R.A. (1984). Cambrian Agnostida of North America and Greenland, Part I. Ptychagnostidae. The University of Kansas Paleontological Contributions, Paper 109. Schwimmer, D.R. (1989). Taxonomy and Biostratigraphic Significance of Some Middle Cambrian Trilobites from the Conasaugua Formation in Western Georgia. J.Paleont., 63(4). Schwimmer, D.R. and W.M. Montante (2012). An Aphelaspis Zone (Upper Cambrian, Paibian) Faunule in the Central Conasauga River Valley, North Georgia, USA. Southeastern Geology, Vol.49, Number 1. (Thanks to Nimravis for pointing this one out!) St. Jean, J. (1973). A New Cambrian Trilobite from the Piedmont of North Carolina. American Journal of Science, Cooper Vol. 273-A. Stitt, J.H. (1977). Latest Cambrian and Earliest Ordovician Trilobites, Wichita Mountains Area, Oklahoma. Oklahoma Geological Survey, Bulletin 124. Stitt, J.H. (1971). Late Cambrian and Earliest Ordovician Trilobites, Timbered Hills and Lower Arbuckle Groups, Western Arbuckle Mountains, Murray County, Oklahoma. Oklahoma Geological Survey, Bulletin 110. Stumm, E.C. (1956). Upper Cambrian Trilobites from Michigan. Contributions from the Museum of Paleontology - University of Michigan, Vol. XIII, Number 4. Sundberg, F.A. (1994). Corynexochida and Ptychopariida (Trilobita, Arthropoda) of the Ehmanielle Biozone (Middle Cambrian), Utah and Nevada.Contributions in Science - Natural History Museum of Los Angeles County, Number 446. (139 pages) Sundberg, F.A. and L.B. McCollum (2003). Early and Mid Cambrian Trilobites from the Outer-Shelf Deposits of Nevada and California, USA. Palaeontology, Vol.46, Part 5. Sundberg, F.A. and L.B. McCollum (2000). Ptychopariid Trilobites of the Lower-Middle Cambrian Boundary Interval, Pioche Shale, Southeastern Nevada. J.Paleont., 74(4). 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. Webster, M. and E. Landing (2016). Geological context, biostratigraphy and systematic revision of late early Cambrian olenelloid trilobites from the Parker and Monkton formations, northwestern Vermont, USA. Australasian Palaeontological Memoirs, 49. Webster, M., R.R. Gaines and M.C. Hughes (2008). Microstratigraphy, trilobite biostratinomy, and depositional environment of the "Lower Cambrian" Ruin Wash Lagerstatte, Pioche Formation, Nevada. Palaeogeography, Palaeoclimatology, Palaeoecology, 264. Westrop, S.R. and J.M. Adrain (2014). The missisquoiid trilobite Parakoldinoidia Endo 1937 in the uppermost Cambrian of Oklahoma and Texas, and its biostratigraphic significance. Memoirs of the Association of Australasian Palaeontologists, 45. Westrop, S.R. and J.M. Adrain (2009). The Late Cambrian (Steptoean; Furongian) trilobite Pseudokingstonia Palmer, 1865 in North America. Can.J.Earth Sci., 46. Westrop, S.R. and J.M. Adrain (2007). Bartonaspis new genus, a trilobite species complex from the base of the Upper Cambrian Sunwaptan Stage in North America. Can.J.Earth Sci., 44. Westrop, S.R., J.M. Adrain and E. Landing (2011). The Cambrian (Sunwaptan, Furongian) agnostoid arthropod Lotagnostus Whitehouse, 1936, in Laurentian and Avalonian North America: systematics and biostratigraphic significance. Bulletin of Geosciences, 86(3). Whittington, H.B. (1995). Oryctocephalid Trilobites from the Cambrian of North America. Palaeontology, Vol.38, Part 3. South America/Central America/Caribbean Bordonaro, O.L., et al. (2008). Trilobite-based biostratigraphic model (biofacies and biozonation) for the Middle Cambrian carbonate platform of the Argentine Precordillera. Geologica Acta, Vol.6, Number 2. Shergold, J.H., O.L. Bordonaro and E. Linan (1995). Late Cambrian Agnostid Trilobites from Argentina. Palaeontology, Vol.38, Part 2. Stone, P., M.R.A. Thomson and A.W.A. Rushton (2012). An Early Cambrian archaeocyath-trilobite fauna in limestone erratics from the Upper Carboniferous Fitzroy Tillite Formation, Falkland Islands. Earth and Environmental Science Transactions of the Royal Society of Edinburgh, Vol.102. (revised text) General Cambrian Trilobites Order Agnostida Daily, B. and J.B. Jago (1975). The Trilobite Lejopyge Hawle and Corda and the Middle-Upper Cambrian Boundary. Palaeontology, Vol.18, Part 3. Robison, R.A. (1978). Origin, Taxonomy and Homeomorphs of Doryagnostus (Cambrian Trilobita). The University of Kansas Paleontological Contributions, Paper 91. Zhang, X.-g. and E.N.K. Clarkson (2009). Trunk segmentation of Cambrian eodiscoid trilobites. Evolution & Development, 11(3). Zhang, X.-g. and E.N.K. Clarkson (1990). The Eyes of Lower Cambrian Eodiscid Trilobites. Palaeontology, Vol.33, Part 4. Order Asaphida Hughes, N.C. (1994). Ontogeny, Intraspecific Variation, and Systematics of the Late Cambrian Trilobite Dikelocephalus. Smithsonian Contributions to Paleobiology, Number 79. Labandeira, C.C. and N.C. Hughes (1994). Biometry of the Late Cambrian Trilobite Genus Dikelocephalus and its Implications for Trilobite Systematics. Journal of Paleontology, Vol.68, Number 3. Order Harpetida Adrain, J.M. and S.R. Westrop (2006). Notchpeakia, a New Genus of Upper Cambrian (Sunwaptan) "Entomaspidid" Trilobites. Journal of Paleontology, 80(6). Order incerti ordinis Whittington, H.B. (1994). Burlingiids: Small Proparian Cambrian Trilobites of Enigmatic Origin. Palaeontology, Vol.37, Part 1. Order Odontopleurida Bruton, D.L. (1983). Cambrian Origins of the Odontopleurid Trilobites. Palaeontology, Vol.26, Part 4. Order Ptychopariida Cotton, T.J. (2001). The Phylogeny and Systematics of Blind Cambrian Ptychoparioid Trilobites. Palaeontology, Vol.44, Part 1. Gaines, R.R. and M.L. Droser (2003). Paleoecology of the familiar trilobite Elrathia kingii: an early exaerobic zone inhabitant. Geology, Vol.31, Number 11. Webster, M. and M.L. Zelditch (2011). Evolutionary Lability of Integration in Cambrian Ptychoparioid Trilobites. Evolutionary Biology, 38. Webster, M. and M.L. Zelditch (2011). Modularity of a Cambrian ptychoparioid trilobite cranidium. Evolution & Development, 13:1. Order Redlichiida Clarkson, E.N.K. (1973). Morphology and Evolution of the Eye in Upper Cambrian Olenidae {Trilobita}. Palaeontology, Vol.16, Part 4. Fortey, R.A. (2000). Olenid trilobites: The oldest known chemoautotrophic symbionts? PNAS, Vol.97, Number 12. Kobayashi, T. (1987). On the Redlichiacea (Trilobita) and the Redlichian Province. Proc. Japan Acad., Series B, Vol.63, Number 2. Laibl, L., J. Esteve and O. Fatka (2017). Giant postembryonic stages of Hydrocephalus and Eccaparadoxides and the origin of lecithotrophy in Cambrian trilobites. Palaeogeography, Palaeoclimatology, Palaeoecology, 470. Lieberman, B.S. (1999). Systematic Revision of the Olenelloidea (Trilobita, Cambrian). Bulletin of the Peabody Museum of Natural History - Yale University, Bull.45. Palmer, A.R. and L.N. Repina (1993). Through a Glass Darkly: Taxonomy, Phylogeny, and Biostratigraphy of the Olenellina. The Univrsity of Kansas - Paleontological Contributions, Number 3. Rushton, A.W.A. (1967). The Upper Cambrian Trilobite Irvingella nuneatonensis (Sharman). Palaeontology, Vol.10, Part 3. Webster, M. (2009). Ontogeny, Systematics and Evolution of the Effaced Early Cambrian Trilobites Peachella Walcott, 1910 and Eopeachella New Genus (Olenelloidea). Journal of Paleontology, 83(2). Webster, M. (2009). Systematic revision of the Cambrian trilobite Bathynotus Hall, 1860, with documentation of new occurrences in western Laurentia and implications for intercontinental biostratigraphic correlation. Memoirs of the Association of Australasian Palaeontologists, 37. Webster, M. (2007). Paranephrolenellus, a new genus of Early Cambrian olenelloid trilobite. Memoirs of the Association of Australasian Palaeontologists, 34. Whittington, H.B. (1980). Exoskeleton, Moult Stage, Appendage Morphology, and Habits of the Middle Cambrian Trilobite Olenoides serratus. Palaeontology, Vol.23. Part 1. General Cambrian Trilobites Alpert, S.P. and J.N. Moore (1975). Lower Cambrian trace fossil evidence for predation on trilobites. Lethaia, Vol.8. Alvaro, J.J., et al. (2003). Palaeogeographical controls on the Cambrian trilobite immigration and evolutionary patterns reported in the western Gondwana margin. Palaeogeography, Palaeoclimatology, Palaeogeography, 195. Eriksson, M.E. and F. Terfelt (2012). Exceptionally Preserved Cambrian Trilobite Digestive System Revealed in 3D by Synchrotron-Radiation X-Ray Tomographic Microscopy. PLoS ONE, 7(4). Kobayashi, T. (1987). The Trilobite Provinciality of the Tethys Sea in the Cambrian Period. Proc. Japan Acad., Series B, Vol.63, Number 4. Lieberman, B.S. (2002). Phylogenetic Analysis of Some Basal Early Cambrian Trilobites, the Biogeographic Origins of the Eutrilobita, and the Timing of the Cambrian Radiation. J.Paleont., 76(4). Rushton, A.W.A. (1968). Revision of Two Upper Cambrian Trilobites. Palaeontology, Vol.11, Part 3. Schoenemann, B. and E.N.K. Clarkson (2013). Discovery of some 400 million year-old sensory structures in the compound eyes of trilobites. Scientific Reports, 3:1429. Whittington, H.B. (1988). Hypostomes and Ventral Cephalic Sutures in Cambrian Trilobites. Palaeontology, Vol. 31, Part 3.
  15. I picked this up for a few quid in a Spanish market from a Moroccan dealer, who usually sells good stuff, but I'm fairly certain it's a fake, it was too cheap, the colour's not quite right and i would say some of it has been carved and painted. It has a couple of bits of real Cambrian trilobite on the back and seems to have a bit of a Flexicalymene or the like glued on top to provide authenticity. What do you guys think?
  16. Tips for sandblaster?

    Does anyone have a suggestion of where to get tips for the end of sandblasting pencils? I have a two pencil unit with a blast box and the tanks on the back ( a vaniman sandstorm). Not sure either if there are different sizes with one more ideal than another? Will mostly be prepping trilobites and some fish.
  17. Eldredgeops rana

    All I can say to this fine specimen is "Wow!" @Malcolmt thank you so much for restoring and preparing this prone Eldredgeops rana. Here is a before and after.
  18. Well, my wife wanted to attend her college reunion in Wisconsin. She was scheduled to fly out of ft Myers Sunday am, but with the hurricane scheduled for the same time, I suggested we travel to Atlanta, evacuating, and allow her to catch a plane from there. That being accomplished, I found myself with at least three days to hang around Atlanta. I remember reading about Tibbs Bridge and so decided to check it out. what a beautiful place, and if you like trilobites, this place has one in practically every piece of muds stone. There are 6 - 8 different kinds of trilobites here. Many pieces, but some nice impressions also. I did find a pygidium and thorax molt that was intact and loose in its little impression niche, but the muds tone broke in half. I felt guilty having such a good time while Irma was assailing my home town, but it was a way to keep my mind off the possibilities... However horrific. The good news is my house is intact, guess those hurricane windows were a good investment. Please keep our area and all of Irma and Harvey's victims in your thoughts... And contribute if you can. I'm am adding an image of one of my favorite finds from this trip. Don't know what it is yet, I'll have to do some research when I get home.
  19. 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.
  20. true or false?

    in German: Write-protected,so no outtakes! Acanthopyge,Selenopeltis,Acadoparadoxides,Cambropallas St. Petersburg trilobites seem to be subject to this blight as well Nice example: Dysplanus glued to an earlier Aseri-stage matrix!.Why?That matrix looked better,thus enabling the dealer to up the price! other: Paralejurus without terrace lines Tutorial_zum_ErkeTrilfakehungen.pdf
  21. Trilobite

    From the album WhodamanHD's Fossil collection.

    Bought before I knew much about trilobites (not that I know a great deal now) in a peculiar place in the New Mexican desert. I bought it for twice as much as I should have. I know very little about this specimen. It might be a flexicalymene.
  22. Good afternoon to all! Is this Trilobite Crotalocephalus Gibbus really real? From which part of Morocco is it discovered? What would be the Period, Era, and Millions of years?
  23. Trilobite and Crinoid Purchase

    Hello Fossil Forum! First time post but been a reader for a while now. I just got back from my honeymoon in Morocco and of course along the way stopped in Erfoud to look at fossils. We went specifically to Macro Fossiles Kasbah where they had a huge selection of fossils and fossils-turned-into-home-goods (sinks, table-tops, etc.). There were huge sheets of fossils, a cutting and polishing area, etc. It seemed legit and I was walking around with the owner for an hour, Raffa, whose dad had owned the place since the 70s. He was very enthusiastic when I showed interest and had a (very rough compared to this forum) knowledge of what we were looking at. At any rate, I picked up two pieces that I would love your opinions on. Both from a specific-identification perspective and a quality / validity perspective. Obviously we have one trilobite and one crinoid. From my eyes I can tell the Crinoid is a composite of what seems to be a few pieces with a bit of filler in there. Not ideal but I love that it's one animal in focus for a smaller piece like this. The stone you see is 14" tall. The spiny trilobite he kept in his office and only showed me after a longer conversation. I believe it to be real and a fairly good example considering its age. The stone you see is 10" tall. Would love opinions on specific species and thoughts on the prep quality. Plan on mounting these vertically in custom frames for a larger specimen wall and hope I made a couple wise purchases! Thanks in advance for your thoughts.
  24. This specimen caught my eye and I was wondering if the two trilobite were put together artificially? My second question is about the black color on these trilobites. I am not sure if they have shoe polish coating over them or the black color occurred naturally? I am still waiting for the seller to send me better close up pictures on the eye of Paralejurus, although it has nothing to do with the topic I will update the pictures when I get them. Of course any additional assessments on the fossil are greatly appreciated.
  25. Cephalon from Ogilvie Mtns.

    Here's one of the head shields from the same location , which I don't think has any relation to the previously posted spiny pygidium ... This is the only type of cephalon I've recovered from that spot.