True Archosaurs and Early Pseudosuchians

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  • เผยแพร่เมื่อ 11 ก.ย. 2024
  • True Archosaurs first appeared during the Early Triassic and soon went on to dominate terrestrial carnivorous niches over the course of the period. Two main lineages emerged: the Pseudosuchians and the Avemetatarsalians. The former can be defined as all Archosaurs closer to modern Crocodilians than to Dinosaurs or Pterosaurs. During the Triassic, the most basal Pseudosuchians were modestly sized, fully terrestrial carnivores capable of running on their hind legs.
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ความคิดเห็น • 79

  • @miguellilly8859
    @miguellilly8859 3 ปีที่แล้ว +106

    imagine a bird that convergently evolved to take on the crocodile niche.

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +73

      Now that would be a sight to see! I can imagine a large carnivorous penguin doing this.

    • @hailgiratinathetruegod7564
      @hailgiratinathetruegod7564 3 ปีที่แล้ว +37

      @@dr.polaris6423 man, the new Happy feet Sequel will be a weird movie

    • @bri1085
      @bri1085 3 ปีที่แล้ว +7

      can endotherms take on that croc niche though?

    • @miguellilly8859
      @miguellilly8859 3 ปีที่แล้ว +18

      @@bri1085 Ambulocetus once held the take on the crocodile niche

    • @bri1085
      @bri1085 3 ปีที่แล้ว +12

      @@miguellilly8859 was it really the crocodile niche or simply the body plan, orcas and sharks have similar body plans but fairly different niches

  • @peterolesen3567
    @peterolesen3567 3 ปีที่แล้ว +23

    Thank you! it is so difficult to find information covering early non-dinosaurian archosaurs

  • @felipeantonio1304
    @felipeantonio1304 3 ปีที่แล้ว +14

    I love the whole crocodile-like creatures from the Triassic. Such fascinating convergent evolutionary traits.

  • @caviramus0993
    @caviramus0993 3 ปีที่แล้ว +38

    Great vid! As a piece of advice, wawelski is pronounced vavelski, there is no "v" in Polish, its sound is taken by the "w" letter.

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +15

      Thanks for letting me know!

    • @scottmccrea1873
      @scottmccrea1873 2 ปีที่แล้ว +1

      Slavic words can be trough for English speakers.

    • @Tsotha
      @Tsotha หลายเดือนก่อน +1

      similar to how in German, W is pronounced V and V is pronounced F

    • @Tsotha
      @Tsotha หลายเดือนก่อน +1

      @@scottmccrea1873 likewise Danes' inability to pronounce Polish surnames is a repeated source of irritation for ethnic Poles in Denmark

  • @TedShatner10
    @TedShatner10 3 ปีที่แล้ว +9

    Everything on the riverbank kept evolving into crocodile forms in the past 300 million years (alongside or before "true" crocodiles) in the same fashion the crab form keeps on emerging.

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +6

      A body shape clearly very well suited to this environment!

    • @TedShatner10
      @TedShatner10 3 ปีที่แล้ว +3

      @@dr.polaris6423 I can envision hippos having remote descendents/cousins becoming the next crocodiles in 50 million years time...

    • @bri1085
      @bri1085 3 ปีที่แล้ว +1

      @@TedShatner10 Won't happen, the hippopotamus is already peak mammal.

    • @TedShatner10
      @TedShatner10 3 ปีที่แล้ว +1

      @@bri1085 But they still got extant crocodiles in their very successful niche alongside them and the hippo body plan is still awkward in comparison (but suited as bear like omnivores).

  • @xenoidaltu601
    @xenoidaltu601 3 ปีที่แล้ว +11

    Can you please talk about the possibility that perhaps all archosauriformes were most likely endothermic.
    The evidence is with how crocodiles potentially regressed to ectothermism but kept a two chambered heart.
    This is also not far fetched as Naked Mole Rats are the only ectothermic mammals. It would be awesome to know how animals "devolve" back to a cold blooded lifestyle.

    • @sockmonkey6666
      @sockmonkey6666 2 ปีที่แล้ว +1

      Nitpick: you mean they kept a four-chambered heart.

  • @thelaughinghyenas8465
    @thelaughinghyenas8465 3 ปีที่แล้ว +10

    Thank you for the episode. This is interesting stuff!

  • @BigChap117
    @BigChap117 3 ปีที่แล้ว +3

    Imagine if following an anthropocene extinction of mammals larger than a cat or dog, crocodilians evolved to mimic their more active archosaur ancestors to fill those niches. Part of me wishes these animals were still around to observe, fascinating for there to have been such active reptiles.

  • @dynamosaurusimperious6341
    @dynamosaurusimperious6341 3 ปีที่แล้ว +17

    *This Is A World*
    Wherr early crocs go bipdeal

  • @carolynallisee2463
    @carolynallisee2463 3 ปีที่แล้ว +9

    Smok- now we know where Smaug's name originated!

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +5

      Certainly sounds similar!

    • @asmodai2025
      @asmodai2025 2 ปีที่แล้ว

      Smaug is the actual German word for smoke :D.

  • @darthjacobynum573
    @darthjacobynum573 3 ปีที่แล้ว +3

    This is the first video from you that I've watched and I really enjoyed it.
    I was looking for a triassic animal to draw for an instagram competition and was thinking about drawing postosuchus, but Smok Wawelski definately caught my attention, I might end up drawing it, thank you for this video!!!

  • @papakarrbear3767
    @papakarrbear3767 3 ปีที่แล้ว +6

    Well see u next year, latter alligator

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +2

      Haha I see what you did there.

  • @alioramus1637
    @alioramus1637 3 ปีที่แล้ว +6

    I like your channel as a paleo-enthusiast. May i suggest gorgonopsids as a topic for perhaps a future video?

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +3

      Good idea!

    • @alioramus1637
      @alioramus1637 3 ปีที่แล้ว +2

      @@dr.polaris6423 That made my day! Thank you!

  • @adamrainey4633
    @adamrainey4633 3 ปีที่แล้ว +4

    Love the video! Keep it up!

  • @sylviancreedmarsh9171
    @sylviancreedmarsh9171 3 ปีที่แล้ว

    Dr. Polaris is a vital part of my day every day. Even the videos I’ve already seen 😍

  • @dazhonghuang5355
    @dazhonghuang5355 3 ปีที่แล้ว +4

    Merry Christmas !

  • @MarkLatimerRussell
    @MarkLatimerRussell 3 ปีที่แล้ว +5

    So, you’re positing Smok is neither a crocodile-line nor bird-line archosaurs?

    • @dr.polaris6423
      @dr.polaris6423  3 ปีที่แล้ว +2

      I could well be, until we can observe more complete remains.

  • @NeroLobo
    @NeroLobo 3 ปีที่แล้ว +2

    Good vid. Happy to find this channel.

  • @reptilo7099
    @reptilo7099 3 ปีที่แล้ว +1

    Smok is one of my favorite Rauisuchids 💯🔥

  • @jrodowens
    @jrodowens 3 ปีที่แล้ว

    Looking forward to what I'm hoping very much will be a video each on rauisucians, poposaurids & crocodylomorphs - my three favorite Mesozoic lineages. But also hope for dinosauromorphs, pterosaurs, Triassic marine reptiles like placodonts, nothosaurs, early icthyosaurs (and more!) and all the other amazing Pangean creatures from metoposaurids to drepanosauramorphs to dicynodonts!
    By the way, if you tackle silesaurids I'd love to hear your take on them. I find the proposal recently (apologies to research authors for not citing you by name) that silesaurids possibly being basal ornithischians to be compelling - it would certainly account for much in the record, and makes good sense to this amateur enthusiast (in other words, I've not credibility.)

  • @vassa1972
    @vassa1972 3 ปีที่แล้ว +2

    Great stuff

  • @cosmo6122
    @cosmo6122 7 หลายเดือนก่อน

    I love this channel

  • @oleandreasjensen5263
    @oleandreasjensen5263 3 ปีที่แล้ว +1

    Thank you for sharing. Love to see and learn about these successfully animals that ruled in the Triassic period and in early Jura. Ia m shure that these animals also have been succseslful predators, and that they some places have lived mabe as long as into the creata period. - But we not discovered the fossils yet !!!

  • @scottmitchell1974
    @scottmitchell1974 ปีที่แล้ว +1

    Oh!! Smok... dragon... Smaug the dragon... there's no way the linguist Tolkien did this on accident.

  • @user-ce6nz8ht3b
    @user-ce6nz8ht3b 3 ปีที่แล้ว

    please more of this pleaseee love it

  • @passingwind2681
    @passingwind2681 3 ปีที่แล้ว

    Love your content

  • @qui-gontimtherandomraptor1072
    @qui-gontimtherandomraptor1072 3 ปีที่แล้ว

    This just reaffirms my theory that all Archosaurs exist on a spectrum from crocodile to bird XD

  • @robyrcmp
    @robyrcmp 3 ปีที่แล้ว

    PLEASE!! turn up your recording volume levels!

  • @anonb4632
    @anonb4632 3 ปีที่แล้ว +2

    What Christmas? Christmas was banned but Black Friday wasn't.

    • @dondragmer2412
      @dondragmer2412 3 ปีที่แล้ว +2

      Christmas was never banned. I celebrated it every year and will continue to do so.

  • @Filbi
    @Filbi 2 ปีที่แล้ว

    Smok Wawelski sounds like a gym teacher.

  • @Pyovali
    @Pyovali 3 ปีที่แล้ว

    Hüwää contenttia yälleen kerran

  • @jimmyshrimbe9361
    @jimmyshrimbe9361 3 ปีที่แล้ว +2

    🤘🤘🤘

  • @queenfry7634
    @queenfry7634 3 ปีที่แล้ว

    Mega crocs