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Found 14 results

  1. cretaceous,USA,Pisces

    A new large Late Cretaceous lamniform shark from North America, with comments on the taxonomy, paleoecology, and evolution of the genus Cretodus Kenshu Shimada &Michael J. Everhart Article: e1673399 | Received 30 Nov 2018, Accepted 09 Sep 2019, Published online: 18 Nov 2019 LINK (description of Cretodus houghtonorum n.sp) edit:5,30 MB,or thereabouts relevant: Philosophical Transactions of the Royal Society of London. Series B, Containing Papers of a Biological Character Vol. 210 (1921), pp. 311-407 V I I I .— On the Calcification o f the Vertebral Centra in Sharks and Rays. B y W . G. R id e w o o d, D.Sc. 18 MB!!
  2. We had two really great Dinosaur programs this week. We have two more Dino programs and a shark program next week too so things are rolling along very nicely for us. I did notice this week that we are missing out on an opportunity to give a broader picture of the paleoecology of the dinosaur era. The kids yesterday wanted to see Pterosaur and marine reptile fossils. We had a chance to really explain the difference between those reptiles and dinosaurs because we have yet to acquire those fossils. I wanted to open this topic to TFF members because I respect the knowledge of fossils and the animals that left the fossils behind that our friends have. We need to round out our programs and I need to begin learning more about dinosaur age animals that were not dinosaurs. We do have croc teeth that will start going with us and I am putting together a display of dinosaur era shark teeth to keep in the dino program bin. Now that I have a better handle on how much material we can fit into an hour long program, I can tighten up the program and find a few minutes to cover non dinosaurs. This is where we need your help. I want to know what critters from the age of dinosaurs you think we should be touching on. What animals do I need to start looking into getting fossil representatives from and what critters do i need to study ? I thought it might be really fun to get the opinions of our friends and have the great minds here contribute to the material cover. This is open to all forum members so give us your thoughts and knowledge. Help us further our education goals by creating a more well rounded program !
  3. 600 Million Years Ago, the First Scavengers Lurked in Dark Ocean Gardens, By Asher Elbein, New York Times https://www.nytimes.com/2018/11/30/science/ediacaran-period-predators.html The bizarre organisms of the Ediacaran Period have long puzzled researchers. Fossil discoveries suggest these ecosystems may have been more complicated than once thought. The paper is: James G. Gehling, Mary L. Droser, 2018, Ediacaran scavenging as a prelude to predation. Emerging Topics in Life Sciences. 2 (2) 213-222; DOI: 10.1042/ETLS20170166 http://www.emergtoplifesci.org/content/2/2/213 Yours, Paul H.
  4. Now that we know it wasn't Gastornis, where does that leave the top predator niche in the area?
  5. A bit of quantitative paleoecology

    Just got this new idea for a future MKFRP research avenue Basically, on the beach near the cliffs, there is this area filled with small bits of fossils washed out from the chalk (the so-called "washout zone"). I'll make a sampling of that area, with a few control variables included (i.e. sampling area, maximum sampling depth, fossil size class, quantity of fossils). The sampling will be done by scooping washout material with a bucket & spade, bringing it home and then picking out individual fossils. Based on the fossils collected, I'll then establish relative faunal abundances based on percentages of particular fossil groups. The results obtained from the data will hopefully help to further understanding of the paleoecology of Møns Klint. Similar research has been done on places like Stevns Klint or Rügen, so I'd be expecting similar results for Møns Klint. Small preliminary hypothesis: fish remains won't have reach an abundance higher than ~5% Closeup picture of the "washout material"; taken from Meyer (2015) - "Fossilerne fra Møns Klint"
  6. Permian fossilised food chain

    Hey everyone You guys might already know about this, but since this fossil is so wonderful, I decided I'd share this paper on TFF (it's kind of old news, but it's a really fascinating find). The paper describes a xenacanth shark (Triodus sessilis) with two temnospondyl tetrapods (Cheliderpeton latirostre and Archegosaurus decheni) as gut content. One of those temnospondyls had ingested an acanthodian fish (Acanthodes bronni) which is also preserved in the fossil. Basically, a "fish in an amphibian in a shark". The specimen was collected from the Permian of Lebach (southwestern Germany). Here's the paper. Enjoy Kriwet et al. 2008 Fossilised 3-level trophic chain.pdf
  7. Dinosaurs ended - and originated - with a bang ? In the new paper, published today in Nature Communications, evidence is provided to match the two events – the mass extinction, called the Carnian Pluvial Episode, and the initial diversification of dinosaurs Press release http://www.bristol.ac.uk/news/2018/april/dinosaurs-ended-and-originated-with-a-bang-.html Paper https://www.nature.com/articles/s41467-018-03996-1
  8. Was the Bering Land Bridge a good place to live? By Ned Rozell, University of Alaska Fairbanks, February 24, 2018 https://www.adn.com/alaska-news/science/2018/02/24/was-the-bering-land-bridge-a-good-place-to-live/ Was the ice age's Bering Land Bridge a good place to live? By Ned Rozell, University of Alaska Fairbanks, February 28, 2018 http://www.valdezstar.net/story/2018/02/28/main-news/was-the-ice-ages-bering-land-bridge-a-good-place-to-live/1842.html Yours, Paul H.
  9. FumegtCORRECTEDPROOF (1).pdf given the roster of authors and the source publication:HIGHLY recommended/about 2,9 Mb One new avimimid named figs 1 & 12 are a hoot, and pretty useful. Cranial & postcranial material ,BTW
  10. Kornei, Katherine, 2018, Signatures of Dinosaur Poop Found in Cretaceous Coal Seams. EOS Earth and Space News, vol. 99, no. 1, p. 5. https://eos.org/wp-content/uploads/2017/12/Jan-18_magazine.pdf https://eos.org/current-issues https://eos.org/articles/signatures-of-dinosaur-poop-found-in-cretaceous-coal-seams Doughty, C.E., 2017. Herbivores increase the global availability of nutrients over millions of years. Nature ecology & evolution, 1(12), pp. 1820-1827. https://www.nature.com/articles/s41559-017-0341-1 Yours, Paul H.
  11. Muito obrigado

    GSAILL raison d' etre for this post : -classic locality -an in-depth analysis -I might be wrong,but for those who collect at/near/in this area,there's a lot of useful information in this thesis VERY NICE WHEELER DIAGRAM
  12. Life in the Precambrian may have been much livelier than previously thought Vanderbilt University, May 19, 2017 https://www.sciencedaily.com/releases/2017/05/170519084411.htm https://news.vanderbilt.edu/2017/05/18/life-precambrian-livelier/ "The strange creatures that lived in the Garden of the Ediacaran more than 540 million years ago, before animals came on the scene, may have been much more dynamic than experts have thought." The paper is: Darroch, S., A. F., I. A. Rahman, B. Gibson, R. A. Racicot, and M. Laflamme, 2017, Inference of facultative mobility in the enigmatic Ediacaran organism Parvancorina. Biology Letters, 2017; 13 (5): 20170033 DOI: 10.1098/rsbl.2017.0033 http://rsbl.royalsocietypublishing.org/content/13/5/20170033 Yours, Paul H.
  13. Hi all, I've been a member here for a while now and posted mostly about what I do with fossils for fun. This is what got me started as a kid interested in this whole thing. Splitting open a rock and being the first human to see the remains of a long-dead life form. I always knew I wanted to be a palaeontologist, but imagined myself as the more "traditional" palaeontologist out in the field probably extracting large vertebrate fossils from hard rock laid down millions of years ago. I thought I would start this thread to share some of my work with fossils that I do for a living. This is a little bit different to most of what is posted on here, but I thought some folks might enjoy it. I'm basically a paleoecologist dealing with younger deposits, so many of the principles are the same as paleontology and paleoecology in "deeper" time. I think we just "pretend" to have more precision! My work focuses mainly on environmental change during the Quaternary or about the last 2.6 million years. A lot of people study this time period since the Earth was pretty much in the same configuration as it is today (placement of the continents) and so we might be able to predict the future by understanding the past. I mainly work with lake and bog sediments as these are excellent archives of environmental change. Layers of mud slowly build up over time and incorporate all sorts of fossils that can tell us about the conditions in the lake or bog (e.g. water quality), vegetation and fires in the catchment (via fossil pollen and charcoal). I'm interested in how humans modify ecosystems through deforestation and agriculture and also long term climate change. I thought I would share some reports and pics of field trips - some recent ones and some still to come and share and describe the methods and results and what they actually mean. Watch this space!
  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 September 10, 2016. Phylum Brachiopoda - The Lamp Shells. General Brachiopods General Brachiopoda - Asia/Malaysia/Pacific Islands Cooper, G.A. (1978). Tertiary and Quaternary Brachiopods from the Southwest Pacific. Smithsonian Contributions to Paleontobiology, Number 38. Khan, F.R. and J. Afzal (2005). Comparative Study of Brachiopods of Chhidru Formation from Zaluch and Nammal Sections, Western Salt Range, Pakistan. Pakistan Journal of Hydrocarbon Research, Vol.15. Shu-Zhong, S., et al. (2006). Brachiopod diversity patterns from Carboniferous to Triassic in South China. Geological Journal, 41. General Brachiopoda - Australia/New Zealand Allan, R.S. (1945). Palaeozoic and Mesozoic Brachiopod Faunas in New Zealand: with an Index to the Genera and Species.Transactions of the Royal Society of New Zealand, Vol.75, Part I. General Brachiopoda - Europe (including Greenland) Cocks, L.R.M. (1979). New Acrotretacean Brachiopods from the Palaeozoic of Britain and Austria. Palaeontology, Vol.22, Part 1. Copper, P. (1973). Bifida and Kayseria (Brachiopoda) and Their Affinity. Palaeontology, Vol.16, Part 1. Hanken, N.-M., and D.A.T. Harper (1985). The Taxonomy, Shell Structure, and Palaeoecology of the Trimerellid Brachiopod Gasconsia Northrop. Palaeontology, Vol.28, Part 2. General Brachiopoda - North America Alexander, R.R. (1977). Growth, Morphology and Ecology of Paleozoic and Mesozoic Opportunistic Species of Brachiopods from Idaho-Utah. Journal of Paleontology, Vol.51, Number 6. Anderson, E.J. and J.H. Makurath (1973). Palaeoecology of Appalachian Gypidulid Brachiopods. Palaeontology, Vol.16, Part 2. Cooper, G.A. (1988).Some Tertiary Brachiopods of the East Coast of the United States. Smithsonian Contributions to Paleobiology, Number 64. Ehlers, G.M. (1963). Cyrtina hamiltonensis (Hall) and a New Species of this Brachiopod Genus from New York. Contributions from the Museum of Paleontology - The University of Michigan, Vol. XVIII, Number 12. Feldman, H.R. (1985). Brachiopods of the Onondaga Limestone in Central and Southeastern New York.Bulletin of the American Museum of Natural History, Vol.179, Article 3. Greiner, H. (1957). "Spirifer disjunctus": Its Evolution and Paleoecology in the Catskill Delta. Peabody Museum of Natural History, Bulletin 11. Hanken, N.-M., and D.A.T. Harper (1985). The Taxonomy, Shell Structure, and Palaeoecology of the Trimerellid Brachiopod Gasconsia Northrop. Palaeontology, Vol.28, Part 2. Johnson, M.E. (1979). Evolutionary Brachiopod Lineages from the Llandovery Series of Eastern Iowa. Palaeontology, Vol.22, Part 3. Schuchert, C. (1897). A Synopsis of American Fossil Brachiopoda Including Bibliography and Synonymy. Bulletin of the United States Geological Survey, Number 87. (494 pages, 34.5MB download) Von Bitter, P.H. and R. Ludvigsen (1979). Formation and Function of Protegular Pitting in Some North American Acrotretid Brachiopods. Palaeontology, Vol.22, Part 3. General Brachiopoda - South America/Central America/Caribbean Cooper, G.A. (1979). Tertiary and Cretaceous Brachiopods from Cuba and the Caribbean. Smithsonian Contributions to Paleobiology, Number 37. Sandy, M.R. (1997). Mesozoic Brachiopods of Mexico - A Review and Some Comments on Their Paleobiogeographic Affinities and Paleoecology.Revista Mexicana de Ciencias Geologicas, Vol.14, Number 2. General Brachiopoda Ager, D.V. (1957). The True Rhynchonella. Palaeontology, Vol.1, Part 1. Amos, A. and A.J. Boucot (1963). A Revision of the Brachiopod Family Leptocoeliidae. Palaeontology, Vol.6, Part 3. Baker, P.G. (1990). The Classification, Origin and Phylogeny of Thecideidine Brachiopods. Palaeontology, Vol.33, Part 1. Baker, P.G. (1984). New Evidence of a Spiriferide Ancestor for the Thecideidina (Brachiopoda). Palaeontology, Vol.27, Part 4. Biernat, G. and C.C. Emig (1993). Anatomical distinctions of the Mesozoic lingulide brachiopods. Acta Palaeontologica Polonica, 38(1-2). Biernat, G. and A. Williams (1971). Shell Structure of the Siphonotretacean Brachiopoda. Palaeontology, Vol.14, Part 3. Boucot, A.J. and G.M. Ehlers (1963). Two New Genera of Stricklandid Brachiopods. Contributions from the Museum of Paleontology - The University of Michigan, Vol.XVIII, Number 4. Campbell, K.S.W. (1959). The Type Species of Three Upper Palaeozoic Punctate Spiriferoids. Palaeontology, Vol.1, Part 4. Carlson, S.J. (2016). The Evolution of Brachiopoda. Annual Review of Earth and Planetary Sciences, 44(1). Cooper, G.A. (1983). The Terebratulacea (Brachiopoda), Triassic to Recent: A Study of the Brachidia (Loops).Smithsonian Contributions to Paleobiology, Number 50. (460 pages, 21.3 MB) Cowen, R. (1975). 'Flapping valves' in brachiopods. Lethaia, Vol.8. Emig, C.C. (2002). Tools for linguloid taxonomy: the genus Obolus (Brachiopoda) as an example. Notebooks on Geology, Article 2002/01. Fursich, F.T. and J.M. Hurst (1974). Environmental Factors Determining the Distribution of Brachiopods. Palaeontology, Vol.17, Part 4. Harper, D.A.T. and E. Gallagher (2001). Diversity, disparity and distributional patterns amongst the orthide brachiopod groups. Journal of the Czech Geological Society, (46), 3-4. Johnson, J.G. (1974). Affinity of Dayiacean Brachiopods. Palaeontology, Vol.17, Part 2. MacKinnon, D.I. and A. Williams (1974). Shell Structure of Terebratulid Bachiopods. Palaeontology, Vol.17, Part 1. Mergl, M. (2010). Discinid brachiopod life assemblages: Fossil and extant. Bulletin of Geosciences, 85(1). Plotnick, R.E., et al. (2013). The Orientation of Strophomenid Brachiopods on Soft Substrates. Journal of Paleontology, 87(5). Rudwick, M.J.S. (1964). The Function of Zigzag Deflexions in the Commissures of Fossil Brachiopods. Palaeontology, Vol.7, Part 1. Steele-Petrovic, H.M. (1979). The Physiological Differences Between Articulate Brachiopods and Filter-Feeding Bivalves as a Factor in the Evolution of Marine Level-Bottom Communities. Palaeontology, Vol.22, Part 1. Williams, A. (1968). Evolution of the Shell Structure of Articulate Brachiopods. Special Papers in Palaeontology, Number 2. Williams, A. and L.E. Holmer (1992). Ornamentation and Shell Structure of Acrotretoid Brachiopods. Palaeontology, Vol.35, Part 3. Williams, A. and S. Mackay (1979). Differentiation of the Brachiopod Periostracum. Palaeontology, Vol.22, Part 3. Williams, A. and A.D. Wright (1970). Shell Structure of the Craniacea and Other Calcareous Inarticulate Brachiopoda. Special Papers in Palaeontology, Number 7. Williams, A. and A.D. Wright (1961). The Origin of the Loop in Articulate Brachiopods. Palaeontology, Vol.4, Part 2. Williams, A., et al. (1998). The Diversity and Phylogeny of Paterinate Brachiopods. Palaeontology, Vol.41, Part 2. Wright, A.D. (1981). The External Surface of Dictyonella and of Other Pitted Brachiopods. Palaeontology, Vol.24, Part 3. Wright, A.D. (1971). Taxonomic Significance of the Pseudodeltidium in Triplesiacean Brachiopods. Palaeontology, Vol.14, Part 2. Wright, A.D. (1963). The Morphology of the Brachiopod Superfamily Triplesiacea. Palaeontology, Vol.5, Part 4. Wright, A.D. and M. Melou (1998). Mantle-Body Arrangement Along the Hinge of Early Protrematous Brachiopods: Evidence from Crozonorthis. Palaeontology, Vol.41, Part 4. Wright, A.D. and J. Nolvak (1997). Functional Significance of the Spines of the Ordovician Lingulate Brachiopod Acanthambonia. Palaeontology, Vol.40, Part 1. Wright, A.D. and M. Rubel (1996). A Review of the Morphological Features Affecting the Classification of Clitambonitidine Brachiopods. Palaeontology, Vol.39, Part 1.