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  1. So last year my friend Jared Voris named both Thanatotheristes degrootorum and Daspletosaurini (as you all probably know). For the past year a few others and I been studying this clade (you probably all know as well) and have been able to put up a good argument for two unnamed and controversial Daspletosaurus species, one from the Dinosaur Park Formation of Alberta and the other from the Judith River Formation of Montana. This presents that there’s most likely 4 Daspletosaurus species, there’s also been evidence of a possible (note possible, just kind of a guess based of age and location) Th
  2. When it comes to evolutionary lineages that tend to be represented by flow charts, would it be viable to also represent/reorganize them into hypothetical cladograms? Considering that flow charts continue to be used for certain lineages (i.e. Lamnidae), I am feeling the possibility that there might be something that makes the interpretation of such charts incompatible with cladograms. For example, below are evolutionary lineages for Isurus and Carcharodon per Heim (1996) and Canevet & Lebrun (2018) (left and right respectively) that I translated into possible cladograms. If this
  3. fifbrindacier

    evolution and teeth

    Hi, i'm preparing an article for Aturia, the paleontological revue of my club about how and when teeth appeared and their evolution. I've found some articles about it : https://www.nature.com/articles/nature11555 ; https://doi.org/10.1101/2020.07.08.193839 ; https://www.diva-portal.org/smash/get/diva2:1076188/FULLTEXT01.pdf. I'm looking for other papers that could help me for that work so i ask your help. @Troodon @Harry Pristis @Al Dente ? Cheers, Sophie.
  4. Taxonomic debate over extinct lamniformes remains a big thing, but I've noticed that it seems like there hasn't been any studies that use modern phylogenetic techniques (i.e. maximum parsimony) to resolve issues with extinct taxa (i.e. Carcharodon, Isurus, Macrorhizodus, Otodus). Is there a reason for this absence, or perhaps I simply have not come across one that already exists? I suppose it's possible that dental characteristics alone as character codes for a phylogenetic matrix may not be viable...
  5. Earth's mountains disappeared for a billion years, and then life stopped evolving A dead supercontinent may be to blame By Brandon Specktor, Live Science Tang, M., Chu, X., Hao, J. and Shen, B., 2021. Orogenic quiescence in Earth’s middle age. Science, 371(6530), pp.728-731. Yorus, Paul H.
  6. For those with an interest in hominin paleontology this article describes the discovery of a significant find, a Paranthropus robustus skull. https://www.bbc.com/news/world-australia-54882214 Here is a link to the actual paper in Nature Ecology and Evolution (paywalled). https://www.nature.com/articles/s41559-020-01319-6
  7. https://phys.org/news/2020-10-giant-lizards-learnt-millions-years.html?fbclid=IwAR1QVtoiNraBjhR0co0ae7Ajt9UxfBkjtIqwrLQMYhmCEr_XQlqFN5pW4VE Scientific journal: 150 million years of sustained increase in pterosaur flight efficiency, Nature (2020). DOI: 10.1038/s41586-020-2858-8 , www.nature.com/articles/s41586-020-2858-8
  8. ThePhysicist

    Harding Sandstone Microfossils

    Back in May or so I got my hands on some micromatrix from the Harding Sandstone, CO, USA. This formation dates back to the Ordovician: ~450-475 mya. It's chock full of some really cool and important fossils. It has some of the earliest vertebrate material, and some of the earliest steps in the evolution of teeth! I hope this is an informative and fun look into an important period in life's history. If you feel I have mischaracterized something or have left out pertinent information, please do speak up! I do also plan to post more pictures as I sort through material. If there's something specif
  9. https://phys.org/news/2020-06-million-year-old-fish-resembles-sturgeon-evolutionary.html?fbclid=IwAR3FE_g9MI_kaL_Nc25IdxqjMQ3F2cfBCq33zml_J4gRkPMkh8nPecNsYjw Jack Stack et al, Tanyrhinichthys mcallisteri, a long-rostrumed Pennsylvanian ray-finned fish (Actinopterygii) and the simultaneous appearance of novel ecomorphologies in Late Palaeozoic fishes, Zoological Journal of the Linnean Society (2020). DOI: 10.1093/zoolinnean/zlaa044
  10. https://phys.org/news/2020-06-microfossil-spectroscopy-dates-earth-animals.html?fbclid=IwAR15tVkP0pUuvoyi-8ByQN2_GC-wRxUSND-0xkRdv5meV0zwY16MbPNGiqo Ross P. Anderson et al. Aluminosilicate haloes preserve complex life approximately 800 million years ago, Interface Focus (2020). DOI: 10.1098/rsfs.2020.0011
  11. I have finally managed to persuade a teacher to let me do an at least slightly paleontological essay so i'm really happy, however the topic i'm doing is quite broad but i do have 1.5k words to summarise it in, i would like briefly outline the key crossroads in the evolutionary lineage of humans, i have shortened these to: Sarcopterygii-tetrapods , reptile to mammal, 4 legged to 2 legged , i would appreciate any opinions on this and any literature that anyone knew would be helpful, thanks again, will
  12. Just watched fascinating documentary on equid evolution- bout half on the origin (Dawn horse), then progresses to present-day..........Bone
  13. I am new to collecting meg teeth so I hope my question is not “dumb.” Are the tooth cusps on a C. chubutensis vestigial structures from the earlier three pronged tooth like on O. obliquus? I read a physics article about how the megs tooth serration evolves from the smaller prong teeth getting sharks caught on larger prey causing them damage. Did the improved serration as the sharks evolved to be larger lead adult C. megladon adults not having cusps at all? I hope the question makes sense.
  14. doushantuo

    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 Calcificati
  15. I keep thinking I must just be stupidly forgetting/overlooking something, but I haven’t been able to come up with it in a long time. There were birds during the Mesozoic(hesperonis, for example), long before theropods evolved into birds(after the Mesozoic, right? I thought all the already very bird-like Dino’s, like archaeopteryx, dead-ended at the end of the Mesozoic)....what am I missing, here? I’ve been looking at bird evolutionary charts, and none of them seem to make sense of that. I’m not all that learned on this topic, but there are things I at least THOUGHT I knew about it, but I’
  16. A new normal: Study explains universal pattern in fossil record, Santa Fe Institute, June 26, 2019 https://www.sciencedaily.com/releases/2019/06/190626160341.htm http://www.terradaily.com/reports/A_new_normal_Study_explains_universal_pattern_in_fossil_record_999.html https://www.eurekalert.org/pub_releases/2019-06/sfi-ann061919.php The paper is: Rominger, A.J., Fuentes, M.A. and Marquet, P.A., 2019. Nonequilibrium evolution of volatility in origination and extinction explains fat-tailed fluctuations in Phanerozoic biodiversity. Sci
  17. Hi! I made a small visit to the Natural History Museum in Maastricht today to visit the new small exhibition named "Whale: Locality Maastricht" which centers around some Eocene whale bones from an undescribed whale found in the ENCI quarry in Maastricht. The exhibition explores further into the evolution of whales, it's a small exhibition but worth a visit if you haven't seen the museum or if you are really interested in whale evolution. Should any of our Dutch, Belgian & German members decide to visit (or international members who are in the area), then you sho
  18. Hello, I'm looking for a book to understand the evolutions of the birds, something easy to understand. I've found 3 books, anyone here ever read these books? https://www.amazon.com/Feathered-Dinosaurs-Origin-John-Long/dp/0195372662/ref=sr_1_16?keywords=evolution+of+the+birds&qid=1558129346&s=gateway&sr=8-16 https://www.amazon.com/Flying-Dinosaurs-Fearsome-Reptiles-Became/dp/0231171781/ref=sr_1_1?keywords=evolution+of+the+birds&qid=1558129346&s=gateway&sr=8-1 https://www.amazon.com/gp/product/1421415909/ref=dbs_a_def_rwt_hsch_vapi_taft_p
  19. The Evolution of the Chicken. Mark Berres. 2018.02.28 Wednesday Nite @ The Lab Published on Mar 1, 2018 https://www.youtube.com/watch?v=hXL2doMXWfg A related paper is: Bennett, C.E., Thomas, R., Williams, M., Zalasiewicz, J., Edgeworth, M., Miller, H., Coles, B., Foster, A., Burton, E.J. and Marume, U., 2018. The broiler chicken as a signal of a human reconfigured biosphere. Royal Society open science, 5(12), p.180325. https://royalsocietypublishing.org/doi/10.1098/rsos.180325 Some news article are:
  20. Scylla

    New Info on Dinosaur Eggs

    Fossil dino bones predate fossil dino eggs by over 100 million years? Wow. New studies of some of the earliest dino eggs shed light on egg evolution. https://www.google.com/amp/s/phys.org/news/2019-03-world-oldest-eggs-reveal-dinosaur.amp
  21. Bored? Read a book! here you can download books about fossils for free. On this web site https://epdf.tips/ you can download many interesting books about fossils.Search for "fossils", "cambrian" or other keywords and you can get a whole bunch of pdfs (just as an example these titles): Evolution of Fossil Ecosystems Paleogene Fossil Birds Fossil Atlas Fishes Chinese Fossil Vertebrates Discovering Fossil Fishes Fossil Behavior Compendium Trace Fossil Analysis Fossil Sharks, a pictorial review Paleobiology and the Fossil record Paleobot
  22. Scylla

    Pre Cambrian Explosion(s)

    Multiple episodes of rapid evolutionary change may have been linked to climate and oxygen changes from 571 mya on. https://m.phys.org/news/2019-03-ancient-prompt-rethink-animal-evolution.html
  23. Below is an example of how weird and rapid evolution can be. I have to wonder how often this has happened in the past and how invisible it would beto a paleontologist with nothing but hard parts as fossils and the lack of temporal resolution in the geologic record. This Mutant Crayfish Clones Itself, and It’s Taking Over Europe Carl Zimmer. New York Times, Feb. 2018 https://www.nytimes.com/2018/02/05/science/mutant-crayfish-clones-europe.html Decoding the mutant, all-female, self-cloning crayfish Kevin Bersett, University of Illinois, Sept
  24. Fossils key to fulfilling Darwin's 160-year-old prediction December 12, 2018, University of Salford https://phys.org/news/2018-12-fossils-key-fulfilling-darwin-year-old.html The paper is: Beck R.M.D., and Baillie C. 2018. Improvements in the fossil record may largely resolve current conflicts between morphological and molecular estimates of mammal phylogeny. Proc. R. Soc. B. 285: 20181632. https://www.biorxiv.org/content/early/2018/07/20/373191 https://www.biorxiv.org/content/biorxiv/early/2018/07/20/373191.full.pdf https://ro
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