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RickRaptor105 @RickRaptor105 The timespan that Tyrannosaurus rex existed on includes both 69 and 67 million years ago 5:34 PM. May 24, 2026 715 Views

The most meme-centric animal of all time


Uploaded by GG Channel Jun 03, 2026 at 12:03PM EDT

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Origin Entry: Paleontology

File type: png

Resolution: (1125px x 740px)

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SomberPaw Did you know? ми "Archaeopteryx" means "Ancient Wing"! Archaeopteryx were the size of a magpie (roughly 18 in long)! Archaeopteryx lived in the late Jurassic Period 150 million years ago! Archaeopteryx could not fly, only glide! Wikipedia W https://en.wikipedia.org> wiki > Archaeopteryx You visit often
"Ring-shaped" / "Hippo" lips A common misconception is that the hypothetical "Exoparia" ligament or muscle was "out" of the mouth simply because it partially connected to the surface of the jugal. This has misled toward the conclusion that the skin on the rest of the face must have completely covered it, which once again is a product of mistaking this ligament as an outer part of the face as opposed to simply another part of the inner jaw workings. @Telescopteryx (b) "Bird cheeks"/ Rictal flanges When seeing the V-shaped silhouette of Exoparia on theropod dinosaurs, it's instinctually tempting to outline it with bird-like V-shaped cheeks followed by skin. This ignores the fact that birds do not have an Exoparia, and also ignores the evolutionary purpose of rictal flanges, which is for small extremely atricial birds to maximize the area of their gape and facilitate the worms and insects dropped from their parent's mouth as well as to encourage the parent to aim worms toward their mouth, a feeding style that is impossible for large non-avian theropods to perform. Ancestral tetrapod condition ? Nearly all non-avian/non-mammalian lineages of reptiles today share a common ancestral condition of a slit-like jugular opening that streaks from the jugal region and ending near the articular joint connection of the jaw. This is a trait we inherited from our fish ancestors. The reason we mammals eventually developed a dense, ring-like muscular contour around the front of our jaw (and thus entirely covering our once visible jaw musculature under thick fleshy skin) was for the sole exclusive purpose of preventing milk from escaping the mouth while suckling the parent's n------. (In an amusing coincidence, the common bird ancestor of all modern birds also developed a more pronounced layer of skin covering the jugal and muscles.) Until proven otherwise, no non-avian non-mammalian tetrapod went under the evolutionary pressures that would have made the examples above necessary. 10 cm 10 cm 10 cm Allosaurus jim + Sculpted over ons.com *ANECDOTALLY,note that after losing the utility of mobile ring-lips, even whales began reverting to a default condition of a slit-like jugal line with membranous jaw muscle! prasanna
THAT'S THAT'S JUST Maip macrothorax Late Cretaceous South America ??
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    Image Details

    77 views (10 from today)

    Uploaded Jun 03, 2026 at 12:03PM EDT

    Origin Entry

    Paleontology

    Source

    RickRaptor105

    Tags

    67, 69, tyrannosaurus, t rex, dinosaur, paleontology, twitter, rickraptor105, prehistoric

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