When Mammals Were Reptiles - The Synapsid Story ~ with JULIEN BENOIT

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  • čas přidán 16. 06. 2024
  • Were mammals once reptile-like? When did 'mammalness' begin? What are the origins of hair, lactation and warm-bloodedness?
    It all began with a group of animals called the SYNAPSIDS.
    JULIEN BENOIT is a paleontologist based at the Evolutionary Studies Institute, University of the Witwatersrand. His research explores the origins of mammals, going right back to the Permian, over three hundred million years ago.
    MARK from Evolution Soup takes a deep dive with Julien into the world of pelycosaurs, therapsids, and cynodonts - the ancient cousins of all mammals (including ourselves).
    * Any reference to early synapsids being 'reptiles' in this presentation is basically shorthand for reptile-like. This is a complex story and we want it to be accessible to the curious as well as to academics. 🙂
    #evolution #synapsids #mammals
    00:00 START
    01:28 Julien's Background
    06:44 Synapsids
    19:17 When Do Mammals Appear?
    28:30 Cold- to Warm-Blooded
    36:55 Origin of Hair
    47:14 Origin of Lactation
    1:10:14 Upcoming Projects
    LINKS FOR JULIEN BENOIT
    Twitter: / paleonewsfrance
    Researchgate: www.researchgate.net/profile/...
    CZcams: bit.ly/3CpatwY
    French language: / stopscience
    University of the Witwatersrand
    SITE: www.wits.ac.za/
    TWITTER: / witsuniversity
    Animatronic synapsids shown are from 'Permian Monsters: Life Before the Dinosaurs' travelling exhibition produced by Gondwana Studios. Filmed by Evolution Soup at the Horniman Museum, London, UK. www.horniman.ac.uk
    ARTWORK
    Inostrancevia thumbnail art by PALEOREX @paleorex (Instagram)
    / paleorex
    Synapsid depictions by JULIO LACERDA:
    Twitter / juliotheartist
    @JuliotheArtist
    www.deviantart.com/julio-lace...
    / art.julio.lacerda
    Insta: @lacerda.julio
    Huge thank you to these titans of paleo art for their kind permission to use their work!
    Interviews powered by streamyard.com/
    #evolutionsoup #evolution #paleo #paleontology #paleoartist #Homosapiens #hominid #artwork #Darwin #cave #bone #fossils #Neanderthal #australopithecus #hominin #extinct #animals #science #anthropology #paleoanthropology #genus #species #africa #skull #skulls #naturalselection #lucy #paleontology
    ---------------
    SUBSCRIBE to Evolution Soup: bit.ly/2pUOYSb
    FOLLOW Evolution Soup Instagram & Twitter! @evolution_soup
    SUBSCRIBE to the Podcast! evolutionsoup.buzzsprout.com [RSS feed: feeds.buzzsprout.com/354743.rss]
    Evolution Soup SHOP: www.redbubble.com/people/evol...
    In association with Talk Beliefs CZcams Channel: bit.ly/2lA6YOv
    DISCLAIMER:
    Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.
    Creative Commons.

Komentáře • 289

  • @longcastle4863
    @longcastle4863 Před 2 lety +75

    Always so happy when a new Evolution Soup video shows up. These are always the best most up to date information out there. And with the best scientist, researchers and speakers. EDIT _:_ Also, now having watched the whole thing, want to add what an excellent speaker this man is -- explaining his research in such a clear and interesting and even entertaining way -- so that a layman like me has no difficulty following along. Also the whole reptile bones responsible for jaw articulation being selected and adapted by evolution into our inner ear bones (anvil and hammer) thing blew me away a little. Learned something new there about evolution I really hadn't fully realized or understood before.

    • @EvolutionSoup
      @EvolutionSoup  Před 2 lety +6

      Thanks for your encouraging words. Julien was great to work with.

    • @rehgaalkane8518
      @rehgaalkane8518 Před 2 lety +2

      Right!

    • @kp6215
      @kp6215 Před 3 měsíci +1

      This is what I use UTube for constantly learning a free university.

    • @maple22moose44
      @maple22moose44 Před měsícem

      The fact that is occurred independently in different groups of mammals is also why there are different inner ear joints between therians (marsupials and placentals) and monotremes, the jaw joint was slightly different, and the different joints remained as they migrated back to form the inner ear

  • @CookaSoupNieceEH
    @CookaSoupNieceEH Před 2 lety +185

    It's sad that humanity's (and most researchers) obsession with Dinosauria overshadows the utterly fascinating Permian. I still haven't found a decent documentary about gorgonopsian or a book dedicated to it. Thank you for this episode!

    • @nicolasmanenti
      @nicolasmanenti Před 2 lety +10

      Worst is when you consider anything outside vertebrates....

    • @stanhry
      @stanhry Před 2 lety +23

      Most people think Dimetordon is a dinosaur.

    • @kinglyzard
      @kinglyzard Před 2 lety +16

      @@stanhry
      Or, worse yet, confuse it with Spinosaurus

    • @johnnyrepine937
      @johnnyrepine937 Před 2 lety +11

      @@stanhry Both dimetrodon and smilodon been included in packs of dinosaurs for decades. While these toys can spark a child's interest in prehistoric life, they are sorely lacking in nuance.
      Also included in some of the older packs of toy ”dinosaurs” were some bizarre creatures that managed to make it into Dungeons and Dragons. The oversized bug creature became the inspiration for the rust monster, while the bipedal oddity became the basis for the owl bear hybrid.
      Other prehistoric media also muddied the waters, quite literally when it came to ichthyosaur and plesiosaur, and figuratively when it came to the sheer geological time span difference between certain organisms.

    • @sarahlynn4798
      @sarahlynn4798 Před 2 lety +6

      Tell me about it! I am always looking for Paleo content & I cannot wait for future docs on all my favorite extinct fauna 💕

  • @lukaszmizera
    @lukaszmizera Před 2 lety +48

    Speaking about something very complex in a simple way requires deep knowledge about the topic - Julien shows he has truly this ability. Thank you for your great lecture!

  • @bluemanno7901
    @bluemanno7901 Před 2 lety +18

    If I had a time machine and could only check out one era of prehistory I would choose the Permian. Land animals were just so bizarrely different back then and I have a feeling they looked a lot weirder than artist reconstruction. There are some scientists that believe dimetrodon actually had whiskers!

  • @e.a.hallucigenia1128
    @e.a.hallucigenia1128 Před 2 lety +48

    This was the best lecture I've heard in ages! Julien was fantastic! His explanations were so clear and understandable. I've studied the Therapsids and know a fair amount about them. Thanks for filling in the gaps.

    • @chanseyinthehood8415
      @chanseyinthehood8415 Před 2 lety +4

      If you understand a little bit of french, you can go on his channel, it's a real gold mine.

    • @richjordan6461
      @richjordan6461 Před 2 lety +1

      I enjoyed it to. I listen to a podcast called PALEOCAST and not long ago they had a long episode with the author of a book on synapsids. The book was BEASTS BEFORE US

    • @panderichthys_rhombolepis
      @panderichthys_rhombolepis Před rokem

      Love your user name!

  • @LDrosophila
    @LDrosophila Před 2 lety +6

    I need more synapsid content in my life

  • @post-leftluddite
    @post-leftluddite Před 2 lety +10

    I love learning about gorgonopsids

  • @jamesdownard1510
    @jamesdownard1510 Před 2 lety +5

    Delightful interview. I drew upon a lot of Benoit's work for my book "Evolution Slam Dunk: Why the Reptile-Mammal Transition Proves Macroevolution & How Antievolutionists Ignore It."

    • @eybaza6018
      @eybaza6018 Před 7 měsíci +3

      Oh,where is the book aviable?

  • @latheofheaven1017
    @latheofheaven1017 Před 2 lety +9

    I'm fascinated by this part of our lineage and the Permian-Triassic times, and it seems like a very productive part of palaeontology in recent years. Thanks for the great talk Julien.

  • @gnappibr
    @gnappibr Před 2 lety +3

    The history of mammals is really incredible. I hope fossils of the first hairy synapsids are found so that the evolution of this group of animals can be better understood.

  • @nyeti7759
    @nyeti7759 Před 2 lety +10

    I first heard of Julien's work from Ben Thomas, and seeing him speak about his field of expertise he's more than lived up to my expectations. Superb video!

  • @IngerMaaike2
    @IngerMaaike2 Před 2 lety +15

    Fantastic speaker, so clear and easy to follow.

  • @BurntWeeny435
    @BurntWeeny435 Před rokem +5

    THIS BLEW MY MIND SO MANY TIMES!!!
    This has been one of the most interesting and exciting videos I have seen in a long time, (and that's saying something, because this channel has so many fascinating talks)
    Jillian's enthusiasm for this is infectious!
    Please Please Please ask him to give us another talk, and thank you for another great video.

  • @TheSharingan32
    @TheSharingan32 Před 2 lety +10

    I’m a great fan of Julien Benoit, and i discovered your Channel with his post on youtube. I’m subcribin right now ! 😁

  • @Alberad08
    @Alberad08 Před 2 lety +2

    Thank you very much for sharing this - made my evening! Having all these images inserted into the interview was very helpful in understanding and envisioning.

  • @vociferonheraldofthewinter2284
    @vociferonheraldofthewinter2284 Před 5 měsíci +1

    I deeply appreciate the trend for the sciences to acknowledge that "this is the best we got at the moment and we're all going to tentatively agree on this theory for now, but there's a high probability that all this will change as we learn more." Back when I studied physical anthropology, the latest theories were taught as truth. Any challenge to the agreed upon truth was almost viewed as heresy unless the physical evidence was seriously strong. Shaking up old paradigms was extraordinarily difficult.
    Nice to see that everybody has come back to earth and decided to be a little more open minded. I think that the incredible trove of new information that's been discovered over the last few decades has forced people to pry themselves off their high horses a little bit. When I think about what we 'knew' of hominid evolution back in the 80's vs what we know now, I'm astonished. Back then, Lucy and Neanderthals were the best we had. The very *idea* that there were so many hominids running around at certain times was unimaginable.

  • @williammartine5168
    @williammartine5168 Před 2 lety +3

    Brilliant and fascinating. Thanks for bringing us up to date on our ancestry and evolution. The pathways that lead to current mammalian life, and the many subtle and gradual changes, are most interesting. I wish I could go back in time and see those first creatures in life. Thanks to Dr Benoit and Evolution Soup. I am subscribed.

  • @Loreman72
    @Loreman72 Před 2 lety +2

    Hey, my old uni!
    Thanks for the aerial shot, showing the jacarandas! I was a Palaeoclimatologist in the mid 90s.
    So good to see the therapsids getting some attention.

  • @nicolemaddison2945
    @nicolemaddison2945 Před rokem +1

    Very glad I found your channel. Exceptionally good. Hope the channel grows quickly.

  • @bloqueado
    @bloqueado Před rokem +3

    I was reading a book about early synapsids which was saying that mammals never were "reptiles" synapsids and reptiles are branches coming from the same branch, but not reptiles generating us. Did I understand the video wrong?
    Thanks for the video! I love it!

  • @jamesabernethy7896
    @jamesabernethy7896 Před 2 lety +2

    Just found this today and new to your channel in general. Well structured with some straightforward diagrams explain things. I have seen several documentaries and videos covering these same steps in evolution but I think this was much better presented. Julien has a strong accent but his English is very clear, he is knowledgeable, enthusiastic and expressive. You really had great chemistry and rhythm. I really enjoyed this.

    • @EvolutionSoup
      @EvolutionSoup  Před 2 lety

      Great to hear everyone is enjoying this :-)

    • @jamesabernethy7896
      @jamesabernethy7896 Před 2 lety +1

      @@EvolutionSoup It's important to say why a video is good so that you can keep your productions well balanced. And as long as criticism is constructive most content creators react positively too it. Too long, too short, too many edits, not enough visuals. But this was really engaging. Thank you.

  • @LuisAldamiz
    @LuisAldamiz Před 2 lety +1

    A most interesting master class, thank you both Evoluton Soup and Julien Benoît.

  • @D.o.a
    @D.o.a Před 2 lety +10

    Best channel out there don't miss out on this priceless information.

  • @kurtoogle4576
    @kurtoogle4576 Před rokem +1

    Wildly interesting conversation! Thank you Julien Benoit and Mark!

  • @claibino
    @claibino Před 2 lety +1

    Exceptionnel! Amazing conversation, research and presentation. Merci Julien 🥰

  • @bowiedoctor9156
    @bowiedoctor9156 Před 2 lety +3

    Enjoyed the video, well set out and reasoned. Thank you.

  • @alexdetrojan4534
    @alexdetrojan4534 Před 2 lety +1

    Great presentation on synapsids. Knowledgeable and articulated well. 👍

  • @MrBebopbob
    @MrBebopbob Před rokem +1

    Great show. Very informative. Thaanks.

  • @blauth
    @blauth Před 2 lety +4

    Brilliant talk, thank you for this!

  • @Video2Webb
    @Video2Webb Před rokem +3

    What an incredible video this is! Being able to cover that much ground about evolution in a single show really brings it all to life. I gasped when I heard that all mammals derive from a single species that somehow managed to survive extinction - WOW! What good luck for us that was! I thank Julien Benoit for his excellent presentation and look forward to hearing him talk about his knowledge again.

  • @yannschonfeld5847
    @yannschonfeld5847 Před rokem +2

    Having taught in French schools for almost 30 years in France, I remember that the scientific branches in the lycées were better than most secondary schools elsewhere in his day. English was/is not taught so well but Julien's magnificent mind and wonderful, cheerful and engaging character not only underline his brilliant mind and personality but his spontaneous sharing of his knowledge is so, so enthralling. I think we can expect many more great things from Julien in the years to come. Merci!

  • @nate9975
    @nate9975 Před 2 lety +7

    Thank you for this video. It was extremely interesting.

  • @wendydomino
    @wendydomino Před 2 lety +6

    Gorgonopsids and Dimetrodon are two of my favorite ancient types of animals.

  • @georg.camerone56
    @georg.camerone56 Před rokem +2

    Brilliant presentation!

  • @mikesnyder1788
    @mikesnyder1788 Před 2 lety +1

    Outstanding presentation! I have heard some of this before but never so well summarized and in such depth of coverage. I will definitely come back to this site at a later date to make sure I have caught all the main points. Thanks so much for giving us such an informative presentation about this little known journey to "mammalress."

  • @johnstebbins6262
    @johnstebbins6262 Před 2 lety +1

    Absolutely fascinating and educational show. Thank you so much!

  • @empereurempereur6928
    @empereurempereur6928 Před 2 lety +5

    Great video

  • @kinglyzard
    @kinglyzard Před 2 lety +7

    19:18
    This question is difficult to answer because evolution is not linear but more layered.
    The Pelychasaurs are Synapsids, and Therapsids are a modification of their ancestors. Cynodonts add another layer to the evolution of Mammals, with Mammalia being the current body plan of Synapsids.
    Reptile is paraphylletic term, and today it applies to Diapsids rather than Synapsids.

    • @carlfrost3368
      @carlfrost3368 Před 2 lety +1

      Correct! Even the term 'Reptilia' is misleading and is only correct if we include birds and dinosaurs and exclude chelonians and rhynchocephalians.

    • @carlfrost3368
      @carlfrost3368 Před 2 lety +2

      Let's not even discuss the socalled Class Amphibia!

    • @kinglyzard
      @kinglyzard Před 2 lety

      @@carlfrost3368
      A.K.A. Lissamphibia,
      Temnospondyls

    • @needfoolthings
      @needfoolthings Před 2 lety

      @@carlfrost3368 ...or the term fish!

  • @yfrontsguy
    @yfrontsguy Před 2 lety +1

    Wow that was absolutely fascinating! I had to watch it in three installments as so much to take in.
    I wonder if and how the idea of dinosaurs being warm blooded as theorized by Jack Horner impacts on mammalian evolution?
    I also wonder at the parallels between angiosperm evolution and mammalian? They seem to have happened on about the same time scale. Maybe you could get a paleobotanist to do such a superb exposition of the subject as you have done with Julien Benoit ?
    Thanks for putting this together!

  • @Riazor1370
    @Riazor1370 Před 11 měsíci

    When Wikipedia is your e-book and Doctor Benoit is your lecturer, all this give good understanding of synapsid which is very amazing.

  • @teaburg
    @teaburg Před 2 lety +2

    My favorite part is when Mr. Benoit said 'there are too many transitional fossils' to tell the difference between reptile to mammal.
    There is a book dealing with this subject, called Evolution Slam Dunk by R. J. Downard.

  • @JustClaude13
    @JustClaude13 Před 2 lety +3

    Although birds and insects would probably agree that mammals are all color blind, being sensitive to no more than three wavelengths, while the birds and insects can frequently see into the ultraviolet frequencies.

  • @modulator7861
    @modulator7861 Před rokem

    Very cool - Excellent lecture, Julien!

  • @carlfrost3368
    @carlfrost3368 Před 2 lety +9

    Although in reality Synapsids and Reptiles are two entirely seperate lineages (Prothero et al.)that emerged in the Carboniferous However I understand the usage of the term 'mammal like reptiles' in conveying to laypersons and even experts in other fields. Pelycosaurs are now considered a paraphyletic 'waste basket'.

    • @wendydomino
      @wendydomino Před 2 lety +3

      Well the two lineages had a common ancestor that was scaled and probably looked like a lizard.

    • @lester9330
      @lester9330 Před 2 lety +1

      @@wendydomino The evidence demonstrates that earl synapsids had a smooth 'glandular' skin like naked mammals In my opinion Dimetrodon looks nothing like a lizard and if I turned over a board and caught a lizard with a head like Dimetrodon I would jump out of my skin lol

    • @lester9330
      @lester9330 Před 2 lety +3

      And I was raised on movies like "Journey to the Centre of the Earth" (1959) in which they torture poor Iguana lizards into sporting rubber sails on their backs. The other movie of the day "The Lost World" (1960) had a finbacked alligator battling (against it's will) a monitor lizard festooned with plates and a frill Unfortunately these films along with popular books et al fostered the false notion that all these prehistoric animals were giant dinosaurs or lizards or both! I will admit we were hungry to see these creatures depicted in film and often turned a blind eye to the inaccuracies not to mention the inhumane cruelty these animals were subjected to.

    • @mikesnyder1788
      @mikesnyder1788 Před 2 lety +1

      @@lester9330 Agreed! I totally loved those movies as a child and now they upset me because of the things they did to those unfortunate creatures. Give me a battle between two rubber suited monsters (from the 1950's) any day!!!

    • @se6369
      @se6369 Před 2 lety +3

      @@lester9330 Dimetrodon looks like a reptile though, and it is indeed a (mammal like) reptile. And earlier synapsids looked more like lizards too

  • @zachariavallickad7264
    @zachariavallickad7264 Před 7 měsíci +2

    This guy's French.
    And his explanation is the best in English I have heard from anyone .
    French is the mother of English.

  • @tbastdgagitw
    @tbastdgagitw Před 10 měsíci

    Learned a lot! Thanks

  • @hase.von.b
    @hase.von.b Před rokem +2

    very clear talk. Thanks!

  • @EugenioFilippi
    @EugenioFilippi Před 2 lety +3

    Excellent explanations thanks for the entertainment, cheers

  • @simonaatkinson5646
    @simonaatkinson5646 Před 3 měsíci

    I've learnt a new meaning for the verb to whisk - love it!

  • @CynthiaDelFava
    @CynthiaDelFava Před 3 měsíci

    Fascinating video.

  • @davecorry7723
    @davecorry7723 Před 2 lety +1

    That was sooooo great!

  • @JB-gw8ee
    @JB-gw8ee Před 2 lety +1

    Very cool, thank you!

  • @ArleneDKatz
    @ArleneDKatz Před 2 lety +1

    Wonderful. Thank you

  • @LDrosophila
    @LDrosophila Před 2 lety +2

    I have read that at least the production of immunogloblulin secretion (pre-lactation) for progeny could have occured as early as our most amphibian-like anscestor. It could go back as far as late Devonioan.

  • @AbdulHannanAbdulMatheen
    @AbdulHannanAbdulMatheen Před 2 lety +2

    👏🙂
    very interesting

  • @dbbrown1949
    @dbbrown1949 Před 2 lety +3

    Oh I really enjoyed this,what an intelligent young man

    • @RockTheBass
      @RockTheBass Před 2 lety

      He's young but not *that* young. He's in his mid-30's. I believe he was born circa 1987. He's definitely intelligent. (And cute, too.)

  • @pooyanshafai7566
    @pooyanshafai7566 Před rokem +1

    Thank you thank you thank you for this excellent video

  • @barc0deblankblank
    @barc0deblankblank Před 2 lety +5

    Hair, pycnofibers, feathers: They're all excretions of a high metabolism. From what I gather, their existence came about as a byproduct of high metabolic rates, in an effort to rid the organism of materials in the form of excess keratin. This was later useful as insulation and for heat dissipation - hence there is no contradiction, per se: A high metabolism could be ectothermic, initially, leading to the sprouting of hair, which in turn could have acted as the bedrock for mammalian endothermy as we know it (Thus hair might have been a byproduct of high ectothermic metabolisms that kickstarted endothermy in mammals). Correct me If I've understood wrong, just a layman.

    • @2degucitas
      @2degucitas Před 2 lety

      What advantage does shedding keratin from the skin give to the organism? You are describing it as a type of excretion. I can't deduce the benefit. Gaining scales, scutes, hair and feathers has obvious benefit. Sweat glands help cool and send pheromones, leading to mammaries.

    • @barc0deblankblank
      @barc0deblankblank Před 2 lety +1

      @@2degucitas Nature doesn’t operate by design. An organism doesn't acquire hair because it "needs" it. Features that happen to exist are repurposed over time and not built to order. Same thing with flight feathers - they weren't originally for flight. There are academic papers concerning the matter, so feel free to look it up!

    • @2degucitas
      @2degucitas Před 2 lety

      @@barc0deblankblank The topic wasn't design or natural evolution having sentience! I'm not a complete idiot! I quote you "in an effort to rid the organism of materials in the form of excess keratin". I just don't see a logical benefit.

    • @barc0deblankblank
      @barc0deblankblank Před 2 lety

      @@2degucitas I understand. Yet, this (the excretion of materials) is not a suggestion I thought of myself - I am but a layman. Perhaps some quick research on your behalf would clarify any questions you might have.

  • @steakfou5042
    @steakfou5042 Před 2 lety +1

    Thanks!

  • @jamesdownard1510
    @jamesdownard1510 Před 2 lety +1

    @23:16 apropos the Probainognathis fossil, that critter’s transitional double-jaw layout was predicted by Robert Broom in 1912 (about a decade before he became more famed concerning early Australopithecine finds). Diararthrognathus mentioned a few minutes later was found in the 1930s, and was named D. boomii in his honor of his prediction.
    His paper:
    Broom, Robert. 1912. “On the Structure of the Internal Ear and the Relations of the Basieranial Nerves in Dicynodon, and on the Homology of the Mammalian Auditory Ossicles.” Proceedings of the Zoological Society of London (March publication): 419-425.

  • @lougomes2912
    @lougomes2912 Před 2 lety +3

    Thank you very much.

  • @bigmikeyc83
    @bigmikeyc83 Před 2 lety +2

    Its crazy how long life has been around and that humans have only been here a very short time in comparison

  • @glintinggold
    @glintinggold Před rokem

    At 40:40 he's talking about intermediately between scaly impressions and hairy impressions, there were skin impressions similar to a human's but with no hair follicles... I'd say the mouse with an extra foramen and no hair had that kind of skin. At the time some forms were losing that foramen and developing whiskers, those particular forms may have been located in polar regions, necessitating an alternate warming method to basking, thus creating the vacuum Mother Nature abhors and when these advantageous mutations arrived, they were able to thrive along with the polar protomammals.

  • @leskuzyk2425
    @leskuzyk2425 Před měsícem

    Truly fascinating. Especially that tiny mammal bottleneck transition.

  • @michaeldy3157
    @michaeldy3157 Před 2 lety +7

    We synapsids had the earth first.

    • @bjnslc
      @bjnslc Před 2 lety

      At least along Permian coastlines. Ghost lineages abound.

  • @ruhituncer5943
    @ruhituncer5943 Před 2 lety +2

    Magnificient.

  • @jamesdownard1510
    @jamesdownard1510 Před 2 lety

    @53:00 Benoit’s paper summarizing the MSX2 impact:
    Benoit, J., P. R. Manger, & B. S. Rubidge. 2016. “Palaeoneurological clues to the evolution of defining mammalian soft tissue traits.” Scientific Reports 6 (9 May): 25604.

  • @valipunctro
    @valipunctro Před 2 lety +1

    Julien has a CZcams channel with lecture you guys should check it out.im at the beginning of the vid, don't know if he mentions it.

  • @marthawolfsen5809
    @marthawolfsen5809 Před 9 měsíci +1

    I'm happy to learn more scientific facts-- but I had a summer home in France for twenty years, and his accent making me so homesick!

  • @jurassicfloy9814
    @jurassicfloy9814 Před 10 měsíci +1

    Interesting

  • @user-md9yv7jx2c
    @user-md9yv7jx2c Před 7 měsíci

    I was sold on these things after my Zool professor said he wasn't sure whether to call some of them scaly mice or hairy lizards.

  • @2degucitas
    @2degucitas Před 2 lety +2

    Hairs are also associated with sweat glands, which is what mammary glands are.

  • @LDrosophila
    @LDrosophila Před 2 lety +1

    Did undergound cyconodonts maintain the basking "eye?"

  • @MaryAnnNytowl
    @MaryAnnNytowl Před 2 lety +1

    I'm so glad I found this channel! Here's a comment and like for the Almighty Algorithm. 👋🏼🙂👍🏼

  • @panderichthys_rhombolepis

    Perhaps there should have been slides to accompany the explanation.

  • @TragoudistrosMPH
    @TragoudistrosMPH Před 9 hodinami

    50:48 maybe that has something to do with axillary and pubic hair in humans?
    Sweat glands and hair, and lactation are linked. Maybe something derived?

  • @carlfrost3368
    @carlfrost3368 Před 2 lety +4

    You're actually demonstrating the futility of using terms like 'mammal like reptiles' instead of referring to the entire lineage from when it divurges from the tetrapod branch back in the Carboniferous These are only terms of convenience!

    • @bjnslc
      @bjnslc Před 2 lety +2

      'Reptile-like mammals' is a bit better, but also inaccurate and misleading. I use 'synapsids', since we're synapsids all the way down to the split.

    • @carlfrost3368
      @carlfrost3368 Před 2 lety +1

      @@bjnslc I use the term 'Synapsids' but still use the term 'mammal like reptiles, with a qualifier, when speaking with laypeople, but I always mention the correct term. The classic literature, of course, uses the old term so wecannot completely eradicate the usage. The same thing applies to our feathered friends. There is nothing to seperate 'birds' phylogenetically from dinosauria or reptilia proper but do we start referring to the Field Guide to the Theropoda of Eastern North America?

    • @TedShatner10
      @TedShatner10 Před 11 měsíci

      Synapsida parareptilia.

  • @victzegopterix2victorindem895

    Son Anglais est tellement par-fais! X^D

    • @paulochon7692
      @paulochon7692 Před 2 lety +1

      Mdr 😂😂😂

    • @StopScience
      @StopScience Před 2 lety +2

      Me Anglish iz perfect !

    • @thierrypaulltbs
      @thierrypaulltbs Před 2 lety +1

      @@StopScience tu as un vocabulaire extraordinaire ! Vraiment ! Je suis impressionné ! D’un autre côté, l’accent, on le sent, n’était pas ta priorité… néanmoins on te comprend très clairement ! C’est beau ! J’adore tes vidéos

  • @NatsAstrea
    @NatsAstrea Před rokem +1

    "Dreadlocks of milk" is the new band name.

  • @voornaam3191
    @voornaam3191 Před 11 měsíci

    Very nice, but what are mammals evolving into? What will the NEXT step in our evolution look like? All this fascination for the past is okay-ish, but has anybody been thinking about the future?

    • @7inrain
      @7inrain Před 7 měsíci

      Evolution has no target so we simply don't know. A lot will depend on the future environmental conditions and which species has which ecological niche and how it will thrive or die out in it. There are countless pathways and branches into new pathways for the evolution of mammals in the future which just makes it impossible to identify which one is the most viable.

  • @cyprienintexas
    @cyprienintexas Před 2 lety +1

    T'es un chef Julien 💪🔵⚪🔴

  • @DAVIDPETERS12C
    @DAVIDPETERS12C Před 2 lety +3

    By definition, and phylogenetically, the last common ancestor of all living mammals (Megazostrodon) is where the line between pre-mammals and mammals is. Trying to determine this transition with a certain trait, like a jaw joint, is a fool's errand. Case in point: multituberculates in which the embryonic posterior jaw bones (typical ear bones) are retained in adults. This reversal has led to great phylogenetic confusion.

    • @carlfrost3368
      @carlfrost3368 Před 2 lety

      (I wouldn't even try. Simply take the mammalian lineage back to when it branched off from the lineages that led to reptiles (including birds) and the various branches of the so called 'amphibia' Cladistics is elegant, truthful and not defined by life style and habit as the classical classifications from Linnaeus are.

  • @richjordan6461
    @richjordan6461 Před 2 lety +1

    I got a lot out of this video, and thank you, but I'm not too happy that everyone kept referring to synasids as reptiles. Yes, very reptile looking. But aren't mammals themselves technically just modern synapsids? I've seen people call them STEM mammals but that isn't clear. The best is to say "primitive animals of the mammal lineage" although that is VERY wordy. I lean towards mammal-like reptile-like animals. EDIT: Now I hear the French scientist saying "reptile-looking animals" and I am good with that.

    • @EvolutionSoup
      @EvolutionSoup  Před 2 lety +3

      Yes any reference to them being 'reptiles' is really shorthand for reptile-like.

    • @Dr.IanPlect
      @Dr.IanPlect Před rokem +2

      Yes, mammals are synapsids. Stem or proto-mammals works fine when you know it's application.

  • @whatabouttheearth
    @whatabouttheearth Před 2 lety +3

    I came upon some of his classes elsewhere, really like Julian.
    Mammalia were after Reptiliomorpha before Amniota, but Reptiliomorpha is before Eureptilia ("true reptiles"), not all Reptiliomorpha ("reptile like") are "reptiles" (Reptilia and Eureptilia)
    Reptilia was before Eureptilia, both past Sauropsida, after the Sauropsida/Synapsida spit, after Amniota. But I guess somehow Reptilia specifically is considered paraphyletic.
    Mammals were never reptiles in any monophyletic sense, they were merely reptile like and formed further down the road past the Eupelycosauria line of Synapsida.

    • @whatabouttheearth
      @whatabouttheearth Před 2 lety

      @Leda Alexopoulos
      Sometimes I just write comments incase someone else is confused because I remember how confused I got when I was trying to first learn this stuff, 😂 I'm still always confused about something. All the back and forth in the clades gets dizzying.

    • @brawlholic9960
      @brawlholic9960 Před rokem +1

      @@whatabouttheearth Reptiliomorpha were a clade of tetrapods more closely related to amniots than lets say temnospodils or lysamphybia. Amniots were within that clade(Reptiliomopha). The first Amniots split between Sauropsids and Synapsids. Sauropsids is an other way to say ''Reptiles''. A reptiliomorph sister clade to Amniots was the Diadectomorphs

    • @whatabouttheearth
      @whatabouttheearth Před rokem +2

      @@brawlholic9960
      Correct. That is essentially what I said.
      The suffix -morpha essentially implies before. All "reptiles" are Reptiliomorpha and Amniota but not all Reptiliomorpha and Amniota become "reptiles", the Synapsida line does not, "reptiles" are down the Sauropsida line at the Sauropsida/Synapsida split after Amniota

    • @brawlholic9960
      @brawlholic9960 Před rokem +2

      @@whatabouttheearth If it were up to me, I would choose the word "reptile" to be synonymous with Amniotes rather than Sauropsids, because the first Amniotes and Synapsids were very reptilian in appearance. Also if you think about it logically the clade reptiliomorpha to which the Amniote group belongs means "reptile-like"

    • @whatabouttheearth
      @whatabouttheearth Před rokem +2

      @@brawlholic9960
      I see what you're saying but the suffix Morpha is always used as a sign post meaning that the prefix is is on one of those divergent lines ahead.
      So that would be like saying we should refer to Eotetropodoformes as "Tetrapods'" because Tetrapodamorpha is the clade before it, even thought the order of the clades are Tetrapodamorpha, Eotetropodoformes, Elpistostegalia, Stegocephalia THAN Tetrapoda (right before Reptiliomorpha, Amniota.)
      To call Amniota a reptile is to look at it all in reverse since "reptile" came after Sauropsida. It's better to call Synapsida 'Proto mammal amniotes' or 'reptile LIKE proto mammals' .... or better yet, simply Synapsids.

  • @clarkharney8805
    @clarkharney8805 Před rokem +2

    We have cheeks because mammals chew their food unlike reptiles who rip chunks of meat and swallow whole.

    • @eybaza6018
      @eybaza6018 Před 7 měsíci +2

      Some reptiles interestingly convergently evolved chewing-like motions such as Hadrosauroid dinosaurs

  • @spencerhamer1162
    @spencerhamer1162 Před 2 lety

    Hey guys what if we can turn on the embryos of komodo dragon monitor lizards to make them there own mammals of any kind of them

  • @whatabouttheearth
    @whatabouttheearth Před rokem

    "elephants, to whales, to humans, to monkeys, to sloths...all that weird stuff that exists today" 🤣😂🤣

  • @wirehead1000
    @wirehead1000 Před 2 lety

    Interesting, but oversimplified. Scales are present in many modern mammals, for example placental rodents (primarily tails), armadillos, and pangolins and marsupial opossums. It is implied by the presence in both marsupials and placentals that scales predate this mammalian divergence. Relying in parallel evolution to explain this may be viable but the genetics of scales are from our fishy past. We know that most mammals appear to be unscaled but scales predate hair and diapsid feathers and use the same gene expressions to grow. There is a notable dearth of skin fossils in our current inventory and these traces are from a small set of synapsids. It is a leap-in-the-dark to project traits from a limited info set to the entire mammalian clade. Still, this interview gives a useful overview of the Synapsid story. Good work well explained.

  • @johnthefrogakakrazert819

    Discus fish feed skinslime to there young.
    Could this be considered milk?

  • @GeorgeMerl
    @GeorgeMerl Před 11 měsíci

    Its not fair that only one group of synapsids have survived. Archosaurs got two, why couldn't we?

    • @eybaza6018
      @eybaza6018 Před 7 měsíci +2

      If Dicynodonts evolved small body size again they might have survived,the rise of the Kannemeyeriformes as large herbivores ultimately doomed them.

  • @Indystvmicropachycephalosaurus

    I believe gorgonopsid is an
    american bulldog ancestor, they look a-like

  • @demoncore5342
    @demoncore5342 Před 5 měsíci

    If you think of it, we are the wierd ones for not laying eggs. But anyway, the word mammal alone is rooted in nursing, and behavior doesn't fossilize. If we didn't have living monothremes, we would possibly not think those mammals...

  • @amphicyoningens0026
    @amphicyoningens0026 Před 2 lety +2

    un chti devenu paléontologiste !

  • @garfil8807
    @garfil8807 Před rokem +2

    Julien Benoit is cute ❤

  • @Dr.IanPlect
    @Dr.IanPlect Před rokem +2

    For those going by the title; 'When Mammals Were Reptiles' references...
    'Mammal-like reptiles', a term from when we thought mammals evolved from a reptile lineage. Hence those 'reptiles' were thought to be diverging from others and ultimately into mammals. We don't think this anymore and that's why 'mammal-like reptile' is obsolete.

  • @aspirativemusicproduction2135

    Walking with TV show was way cooler than guy with what seams to be French accent 😅

    • @eybaza6018
      @eybaza6018 Před 7 měsíci

      He is far more informative and knowledgable

  • @javierhc
    @javierhc Před 2 lety +1

    Por favor los videos en español :c

  • @kjoonlee
    @kjoonlee Před rokem

    15:15 I had to look up puppy teeth:
    czcams.com/users/shortsarOtzSPtAhE

  • @KAZVorpal
    @KAZVorpal Před 7 měsíci +1

    Time-wasting chit-chat and introductions until 6:38, when they finally start talking about synapsids.

  • @carliegriffin7229
    @carliegriffin7229 Před rokem +1

    🐩🐩💝❤️❤️