Birbs & Dinos

Comments

• Endmaker@ani.social ⁨1⁩ ⁨month⁩ ago

  All dinosaurs are birds

  All birds are dinosaurs.

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• logicbomb@lemmy.world ⁨1⁩ ⁨month⁩ ago

  Reptile Wikipedia:

  In evolutionary taxonomy, reptiles are gathered together under the class Reptilia (/rɛpˈtɪliə/rep-TIL-ee-ə), which corresponds to common usage. Modern cladistic taxonomyregards that group as paraphyletic, since genetic and paleontological evidence has determined that crocodilians are more closely related to birds (class Aves), members of Dinosauria, than to other living reptiles, and thus birds are nested among reptiles from a phylogenetic perspective. Many cladistic systems therefore redefine Reptilia as a clade (monophyletic group) including birds, though the precise definition of this clade varies between authors.

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  • Hawke@lemmy.world ⁨1⁩ ⁨month⁩ ago

    I kinda know what some of those words mean.

    Can I get a picture?

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    • pruwybn@discuss.tchncs.de ⁨1⁩ ⁨month⁩ ago

      Image

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    • TheTechnician27@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Any particular words you don’t know? Probably the most likely ones are para- and monophyletic. For a taxon (scientific grouping) to be valid, it needs to be monophyletic, meaning it contains the most recent common ancestor of the group’s other members and all known descendants of that common ancestor. Paraphyletic, by contrast, means not all the descendants are in there. For example, imagine if the mammals just randomly excluded the bears – that would be paraphyletic, because the bears also share a common ancestor with the other mammals.

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  • Swedneck@discuss.tchncs.de ⁨2⁩ ⁨weeks⁩ ago

    IMO it’s either basically just lizards, which i think is perfectly fine since dinosaurs and even crocodilians aren’t that reptilian to me.
    Or reptile has nothing to do with phylogeny and is instead just a physical description, like “fish” and “tree”.

    Really the only thing that seems particularly similar between lizards and crocodilians is that they have a splayed posture and scaly skin, which is kinda like grouping together humans with ostriches and kangaroos because we walk upright on two legs…

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• hperrin@lemmy.ca ⁨1⁩ ⁨month⁩ ago

  Birds are reptiles in the same sense that people are fish.

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  • Enkrod@feddit.org ⁨1⁩ ⁨month⁩ ago

    Fish is not a valid cladistic term. Birds are reptiles in the same way that people are vertebrates would be about equivalent and correct.

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• Klear@quokk.au ⁨1⁩ ⁨month⁩ ago

  Image

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• IAmNorRealTakeYourMeds@lemmy.world ⁨1⁩ ⁨month⁩ ago

  usually, in biology we use monophyletic groupings, like all descendants of rodents will always be rodents.

  however, those terms “lizard/fish” are not monophyletic, because otherwise all vertebrates would be fish. those are paraphyletic (group includes some descendants of a common ancestors).

  there are already polyphyletic, where we have descendants of multiple sources, ie, Herbivores would be polyphyletic.

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  • Swedneck@discuss.tchncs.de ⁨2⁩ ⁨weeks⁩ ago

    The fundamental problem is that cladistic terms will kind of inevitably become general descriptors of any lifeform that looks/behaves similarly, which is immediately clear when you look at any scifi/fantasy stuff.

    If an alien animal fills the same niche as salmon do on earth, then we’re gonna call it a salmon, and poof suddenly it’s no longer monophyletic.

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    • IAmNorRealTakeYourMeds@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

      it would be a Venusian salmon. same way we have birds and animals with the same name across continents. An Indian porcupine is not related to an American porcupine, but “Indian porcupine” is still monophyletic, and just saying “porcupine” is more informal, though technically paraphyletic.

      We actually do informal cladistics. " fox " isn’t a species but a genus “common fox” is Vulpez vulpez which is a species, while fox refers to all the genus.

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• menas@lemmy.wtf ⁨1⁩ ⁨month⁩ ago

  Transitivity Rex

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• tagoth@lemmy.world ⁨1⁩ ⁨month⁩ ago

  This meme had strong Clint’s repiles vibes until it was etymologically wrong in the third row

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• dreadbeef@lemmy.dbzer0.com ⁨1⁩ ⁨month⁩ ago

  humans are also reptiles!

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  • IAmNorRealTakeYourMeds@lemmy.world ⁨1⁩ ⁨month⁩ ago

    and fish

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    • DragonTypeWyvern@midwest.social ⁨1⁩ ⁨month⁩ ago

      And worms

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• LSNLDN@slrpnk.net ⁨1⁩ ⁨month⁩ ago

  This is why I love science memes - daily new information presented in an enjoyable format that I know I can one hundred percent trust because science.

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• huf@hexbear.net ⁨1⁩ ⁨month⁩ ago

  birds are fish

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• SleepyPie@lemmy.world ⁨1⁩ ⁨month⁩ ago

  Do birds have more brain myelination than reptiles? How do the compare to mammals?

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