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Fossil Record of Fish Morphology altered by Single Pattern Formation Gene
Biotalker posted a topic in General Fossil Discussion
Here is a fine way to spend 16 minutes. A wonderful (even if simplified) story of a gene at the top of the hierarchy of limb formation in tetrapods, and the identification of a mutation in the gene that causes a dramatic change in fish's morphology. It is remarkable that the mutation doesn't affect the protein sequence but the switch that turns it on or off in different tissues of the developing animal. Why would this be of particular interest to you? Because shown herein is the remarkable correlation with the fossil record of this small fish. So grab some popcorn, or better yet a beer or glas- 1 reply
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- pattern formation
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At work, I study convergent antibody evolution in response to COVID vaccination. When you have a chisel everything around you is shale, so during my internet endeavors in paleontology, I find a lot of questions coming up for me about trilobite convergent evolution, particularly between the Moroccan and North American species with which I am most familiar. This thread will be a few different posts of species which have really stood out to me as similar, and I would be delighted if others shared their own observations! For a little background which got me thinking on the topic- I'm
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Questions on the Branchial Structure of Thelodonts
Mainefossils posted a topic in General Fossil Discussion
So, I have been doing more research on thelodont morphology, and I have a few questions regarding the branchial structure, and was hoping for some other people's understanding on this subject. Regarding the branchial structure, what is the most current research? I have read that the species Pezopallichthys ritchiei, Cometicercus talimaaae, Drepanolepis maersae, Sphenonectris turnerae, Turinia pagei, Furcacauda heintzae, and Furcacauda fredholmae, have shown themselves to be among the best preserved articulated thelodonts, with pretty well preserved branchial bars and openings. The -
So...I have some questions about sclerotic rings. In addition to supporting large eyes, resisting pressure, etc. how do they work? I ask as I see four basic forms across species, extant and extinct. the first is a fixed ring fused to the frontal and zygomatics. the second looks to be a fused or partially fused ring that is around the iris the third is a ring of small plates held together by connective tissue and the fourth looks like a camera iris Where my confusion arises is with the third and fourth and some birds and fo
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- morphology
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a slight caveat: the piece is from 2005 supplementary(and included): reasonably large character/taxon matrix Paleobiology, 31(3), 2005, pp. 400–423 Integrating ichnofossil and body fossil records to estimate locomotor posture and spatiotemporal distribution of early sauropod dinosaurs: a stratocladistic approach Jeffrey A. Wilson wilsondinosaurop{ichnolstratocladisphenet+.pdf
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Pimpaounionidlarvontogenicedulcaquital2012.pdf Amer. Malac. Bull. 30(1): 73–84 (2012) 73 Comparative morphometry and morphology of glochidial shells of Amazonian Hyriidae (Mollusca: Bivalvia: Unionida) Daniel Mansur Pimpão, Maria Cristina Dreher Mansur, Paulo Eduardo Aydos Bergonci, and Colin Robert Beasley
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Hi I decided to make a quick guide on how to ID Tyrannosaur teeth from the Belly River Group of Alberta, and the Judith River, Two Medicine Formations. I got this information on a study on how to ID isolated Tyrannosaur teeth from Dr. Angelica Torices. I’ll start off on saying Albertosaurus and Gorgosaurus are extremely alike not much differences in the morphology Daspletosaurus is a little bit Different, the morphology of these two Tyrannosaurs (Gorgosaurus and Daspletosaurus) are probably do to similar evolutionary history Gorgosaurus could of been Albertosaurus ancestor. Now I’ll tell you h
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Bail Chondroid bone in dinosaur embryos and nestlings (Ornithischia: Hadrosauridae): Insights into the growth of the skull and the evolution of skeletal tissues Alida M.Bailleul, Catherine Nyssen-Behets,Benoît Lengelé,Brian K.Hall,John R.Horner Comptes Rendus Palevol Volume 15, Issues 1–2, January 2016, Pages 49-64 about 8,1 MB recommended
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morphological_innovation_and_the_evolution_of_hadrosaurid_dinosaurs.pdf Morphological innovation and the evolution of hadrosaurid dinosaurs Thomas L. Stubbs , Michael J. Benton, Armin Elsler , and Albert Prieto-Márquez Paleobiology, 45(2), 2019, pp. 347–362 DOI: 10.1017/pab.2019.9 Given the source publication,the emphasis is perhaps not where you'd expect it to be Those who grimace at cladistics might not want to read this RECOMMENDED! rating:
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- hadrosauria
- functional morphology
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here Sana KHEMIRI Sana, François J.Meunier , Michel LAURIN,Louise ZYLBERBERG Morphology and structure of the scales in the Gadiformes (Actinopterygii: Teleostei: Paracanthopterygii) and a comparison to the elasmoid scales of other Teleostei Cah. Biol. Mar. (2001) 42 : 345 - 362 DOI: 10.21411/CBM.A.FBAB4704 about 22 Mb CONTAINS cladograms (no pictorial outtakes possible,BTW,alas) When reputable vertebrate histologists get together,this is what you get
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7 ft tall Three toed tracks Walks flat on its feet, not on the sides of its feet Three fingered claw marks Osteoderms in skin Ancestor of cloepus, not bradypus Found in North America (do any known ground sloths have a smaller tail or even no tail at all?)
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Spixianaplacopbe033_0171-0194.pdf Illustrated summary of chiton terminology (Mollusca, Polyplacophora) Enrico Schwabe SPIXIANA 33 2 171–194 München, November 2010 ISSN 0341–8391
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Cr-nier-2013-Palaeontology.pdf MORPHOLOGICAL DISPARITY AND DEVELOPMENTAL PATTERNING: CONTRIBUTIONOF PHACOPID TRILOBITES Catherine Cronier Palaeontology,56/6,2013 edit: probably NOT a repost,unless someone grossly misspelled ""disparity"
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Folke Borg On the body wall of Bryozoa Journal of Cell Science/1926/s2-70 *TAKES a deep BOW* very little of this great bryozoologist can be found online. Which is disappointing,he said ,with a great feeling for understatement borgfolke{jcelsciontogeindispensabodywall1926bryozo1923(watersharmervigeliu)phylog.pdf recommended If anyone knows of any other accessible(non paywalled)online pieces by him,please tell me (edit NOT counting his piece on the recent dulcaquicole bryozoa of the Sahara*) *seemingly: Fredericella and Membranipora
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this being: Whirling in the late Permian: ancestral Gyrinidae show early radiation of beetles before Permian-Triassic mass extinction Evgeny V. Yan,1,2 Rolf G. Beutel,1 and John F. Lawrence3 BMC Evol Biol. 2018; 18: 33. Published online 2018 Mar 16. doi: 10.1186/s12862-018-1139-8 1,63 MB yanbeutelcoleopterentomollagersts12869-8.pdf
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- hexapoda
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2010_Fuchsel_belemollupoolidsuckers.pdf o,5 mb or less,and INNERESTIN!!!!!!
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- coleoidea
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gamberwebetholpredat2018natossil.pdf
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Kats Looking forward to the dental microwear analysis already
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- cranium
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lautenschlraptherop20140497.full.pdf
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- theropoda
- therizinosaur
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EHRET_al-2012-Palaeontology.pdf
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- elasmobranch
- pisces
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toot
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- morphogenesis
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I'm starting to sort through the trilobites I found at Oak Springs and need some help. My degree is in electrical engineering, which means when I was in college I never had to take any of those pesky courses in biology, zoology, etc. But that puts me at a disadvantage now as I read through the descriptions of the candidate trilobites and try to make sense of them. There are a fair number of papers published on the trilobites of the Cambrian in California and Nevada. To help identify what I have collected I'm using this one: Carrara Formation. Here is where I am having difficulty. The des
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I liked it,but that's no guarantee you will schileyshiley.pdf I've included some illustrated taxa in the tags. It's write-protected so I can't post any outtakes
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unreservedly recommended by me Pricecolumelgastrop(BUSYCON)functmorphconchbiomineralizBull.pdf
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When three guys with that kind of reputation in echinodermology get together to write a paper,you just KNOW it's going to be good. Highly recommended,particularly if you love your Loven,Mortensen,Raff,etc. Extremely well illustrated,IMHO Saucepourtpical 04 me.pdf
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- morphology
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