• Prehistory Megathread - Welcome...to Facepunch Park
    106 replies, posted
[QUOTE=RR_Raptor65;44431388]That'd be quite a trick considering they lived about 6 million years apart.[/QUOTE] Tyrannosaurus, not Tyrannosaurus Rex.
[QUOTE=joost1120;44428326]I see your 75% neck and raise you this: 0% neck, 100% jaws. [IMG]http://static.comicvine.com/uploads/original/14/145389/3395401-1434274787-deino.jpg[/IMG] The Deinosuchus. They found Deinosuchus bite marks on Tyrannosaurus fossils. That proves they are the single most bad ass prehistoric animal. They also probably had the single strongest bite force ever, although we'll never know. Even modern day crocodilians came close to a realistic speculation of the Tyrannosaurus Rex's bite force, so an alligator more than twice the size of salt water crocodiles would probably have way more bite force than a T-Rex. They estimate the bite force to be slightly less than double the T-Rex's, at 103,750 Newtons, while the T-Rex is estimated at 57,000 Newtons.[/QUOTE] [img]http://img3.wikia.nocookie.net/__cb20120809150549/dinosaurs/images/a/a3/Deinoskull.jpg[/img] jesus tapdancing CHRIST
[QUOTE=joost1120;44431756]Tyrannosaurus, not Tyrannosaurus Rex.[/QUOTE] There is currently only one species under the genus Tyrannosaurus. Also I don't know where the bite marks you speak of come from, Deinosuchus didn't share habitat with any Tyrannosaurids that I know of.
[QUOTE=RR_Raptor65;44432980]There is currently only one species under the genus Tyrannosaurus. Also I don't know where the bite marks you speak of come from, Deinosuchus didn't share habitat with any Tyrannosaurids that I know of.[/QUOTE]Maybe inter-specific interactions? It could be anything ranging from fights over territory to rough, lion-style kinky dinosex
[QUOTE=Jorori;44433024]Maybe inter-specific interactions? It could be anything ranging from fights over territory to rough, lion-style kinky dinosex[/QUOTE] Yeah, depending on the nature of the injuries it could also be disease related like the 'bite' marks on Sue's lower jaw, again I haven't seen them so I can't say for sure. But Tyrannosaurids did have a habit of biting each other in the face.
[QUOTE=RR_Raptor65;44432980]There is currently only one species under the genus Tyrannosaurus. Also I don't know where the bite marks you speak of come from, Deinosuchus didn't share habitat with any Tyrannosaurids that I know of.[/QUOTE] I got it slightly wrong, it's not the Tyrannosaurus genus, but the Tyrannosaurid family. More specifically Albertosaurus genus.
I remember when i was a kid and we played dinosaurs, we called the dinosaurs names based on what they were known for. There was Vasstand, Långhals and Taggsvans. In English that would be Sharptooth, Longneck and Spiketail. The thing is, these were not made up by us, they were in common usage all over Sweden. Did you guys have anything similar, or was it just us?
[QUOTE=pansarkurt;44440657]I remember when i was a kid and we played dinosaurs, we called the dinosaurs names based on what they were known for. There was Vasstand, Långhals and Taggsvans. In English that would be Sharptooth, Longneck and Spiketail. The thing is, these were not made up by us, they were in common usage all over Sweden. Did you guys have anything similar, or was it just us?[/QUOTE] Those names sound a lot like names from The Land Before Time series.
what the fuck [img]http://upload.wikimedia.org/wikipedia/commons/2/29/Pterodaustro_BW.jpg[/img] also does anyone have a picture of that funny lookin trex with fuckin upside down arms that shit is so goddamn hilarious
Sometimes grasping the sheer size of some dinosaurs scares the shit outta me. Take this, for instance: [QUOTE=joost1120;44431286][IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Crocodilians_scale.png/800px-Crocodilians_scale.png[/IMG] This fucker is twice as big as a salt water crocodile. If this guy had brains, he'd be smart enough to just bite with all his force slightly below the water surface, creating an air bubble going at such high speed that it implodes on itself, creating light and temperatures at nearly the temperature of the sun, like pistol shrimp. With his bite force he'd probably just fire lasers, rather than just immense pressure waves.[/QUOTE] A "crocodile" the size of a goddamn bus? JESUS FUCKING CHRIST, it must have been quite a sight. [editline]2nd May 2014[/editline] [QUOTE=OvB;44407939][IMG]http://i.imgur.com/vpfHvbP.png[/IMG][/QUOTE] A "shark" almost the size of a goddamn [URL="http://en.wikipedia.org/wiki/Blue_whale"]blue whale[/URL]? HOLY SHIT.
So just found this thread, forgive me for replying to old stuff but I quite love this topic... [QUOTE=Zillamaster55;44257297]I wonder if anyone here is opposed to the whole Ontogeny Debate with Dinosaurs. [t]http://blogs.scientificamerican.com/tetrapod-zoology/files/2011/12/Triceratop-ontogeny-Horner-Goodwin-2006-Dec-2011-tiny.jpg[/t] All of these skulls are separate species, but Horner feels that they are all Triceratops at simply different stages of growth.[/QUOTE] Source on those specimens being treated as something else than Triceratops, if you please. Because those have ALWAYS been asigned to Triceratops. [editline]6th May 2014[/editline] [QUOTE=joost1120;44431756]Tyrannosaurus, not Tyrannosaurus Rex.[/QUOTE] Tyrannosaurus is monotypic, and quite chronologically confined. For Deinosuchus, a cohetanean Tyrannosaurid would be Gorgosaurus, probably. [editline]6th May 2014[/editline] [QUOTE=Pretiacruento;44702979]Sometimes grasping the sheer size of some dinosaurs scares the shit outta me. Take this, for instance: A "crocodile" the size of a goddamn bus? JESUS FUCKING CHRIST, it must have been quite a sight. [editline]2nd May 2014[/editline] A "shark" almost the size of a goddamn [URL="http://en.wikipedia.org/wiki/Blue_whale"]blue whale[/URL]? HOLY SHIT.[/QUOTE] Well, the first one is closer to an alligator, but the second is a bona-fide shark. Thank the ice ages and orcas being better at hunting baleen whales for that thing going extinct. [editline]6th May 2014[/editline] [QUOTE=Manatee Cat;44331567]That's true, but they did hunt Tenontosaurus, which was way too big to kill alone. Of course it's also possible that they only hunted juvenile Tenontosaurus.[/QUOTE] They ATE Tenontosaurus. No direct evidence of it being hunting behaviour. Just like Velociraptor at least once fought Protoceratops. Or rather the head of Protoceratops, seeing it was an animal about 10 times heavier despite comparable lenghts. Takes huge gonads to do that tho. [editline]6th May 2014[/editline] [QUOTE=Jorori;44385233]Entelodonts aren't that related to pigs, though. As far as I recall, they fall more near hippos and whales (and extinct critters like Andrewsarchus) in the phylogenetic tree. It's a similar case with hyenas: they look like dogs on steroids but are felids, not canids.[/QUOTE] The best way to describe those guys is as ballerina hippos. And Andrewsarchus seems to be more like one of those guys than a giant hooved wolf; falling closer to those than to Mesonychians as of late, and after all we only have Andy's skull (with its long, long and not quite mesonychian snout). [editline]6th May 2014[/editline] [QUOTE=_Kent_;44259053]Feathered dinosaurs are weird. [img]http://blogs.discovermagazine.com/intersection/files/2009/09/Feathered-dinosaur-Anchio-0091.jpg[/img][/QUOTE] Not if drawn like actual animals and not like draconic action figures: [t]http://fc07.deviantart.net/fs70/f/2014/122/8/2/microraptor_piscivory_by_ewilloughby-d62dmp7.jpg[/t] [editline]6th May 2014[/editline] [QUOTE=joost1120;44258146]It's an interesting theory, but it simply wouldn't make that much sense for them to be different stages of growth. The bone structure wouldn't just change that much.[/QUOTE] [t]http://www.skullsunlimited.com/userfiles/image/variants_large_3162.jpg[/t] [t]https://www.skullsunlimited.com/userfiles/image/variants_large_3163.jpg[/t] Baby chimp versus adult male chimp. Gorillas are even more extreme. Skulls are very plastic. And ceratopsian or pachycephalosaurian skulls are VERY, VERY plastic in terms of bone growth. Seriously, nobody has bothered to challenge the osteological results, and those are the prime support of the theory (as well as some ecological viewpoint; 2 elephant-sized animals in the same area and no divergent specializations apart of display structures is odd; black and white rhinos diverged pretty fast once their lineages separated, for example; sympatric specialization is kind of a bitch).
Non-avian Dinosaurs in general went through pretty wild changes as they matured, T. rex is another fine example.
TBH Tyrannosaurids didn't have such drastic changes upon ontogeny, with the whole phylogeny recapitulation deal. Although Tyrannosaurus' case is quite striking due to it being quite extreme even for a Tyrannosaurid. Still, it is the expected thing to happen when there is such difference in size from hatchling to mature; take a look at modern reptiles, the larger ones are the ones that change the most when growing, and the larger the size discrepancy, the more different niches the animal assumes while growing up. Birds do not play by that rule, but birds have quite important neotenic trends in their evolution (a croc hatchling has a far more birdlike head than an adult croc, and you can say the same for plenty of dinosaur juveniles compared to adult birds), and so one can explain the shift. [editline]6th May 2014[/editline] BTW, plenty of Deinocheirus stuff; incluiding feet and what seems to be a skull: [url]http://www.infomongolia.com/ct/ci/7787/60/The%20%C3%A2%EF%BF%BD%C5%93horrible%20hand%C3%A2%EF%BF%BD%20%20Deinocheirus%20dinosaur%C3%A2%EF%BF%BD%E2%84%A2s%20fossils%20are%20repatriated%20to%20its%20home%20country[/url] Humped giant ornithomimosaurs for the win.
Oh, this thread reminds me! Do you guys know about Deinocheirus, right? The gigantic theropod claws that have been known for a long while. Do you also remember how a more complete skeleton was discovered a year ago or so? With a sail on its back and everything, which added to its weirdness. Well... Hold on to your butts: [url]http://www.infomongolia.com/ct/ci/7787/60/The%20%C3%A2%EF%BF%BD%EF%BF%BDhorrible%20hand%C3%A2%EF%BF%BD%EF%BF%BD%20Deinocheirus%20dinosaur%C3%A2%EF%BF%BD%EF%BF%BDs%20fossils%20are%20repatriated%20to%20its%20home%20country[/url] The article talks about bringing back Deinocheirus's bones back to where they were excavated, in Mongolia, but looking closer you see this photo: [IMG]http://i.imgur.com/ghYLI7r.png[/IMG] See that thing on the right? That's apparently Deinocheirus's skull, which doesn't look at all like a typical ornithomimid skull and rather like the one of a Spoonbill. You can see the article for more photos, and a silhouette of the creature who looks much more like and hadrosaur like Ouranosaurus than a theropod. That's one amazing discovery right there, finally one of the biggest mysteries in paleontology has been solved (almost) completely at last.
Add to that that Utahraptor seems to be one odd motherfucker, from the roughly complete FAMILY GROUP Kirkland is working on, and, well, Gigantoraptor and Therizinosaurus may be normal among giant coelurosaurs.
[img]http://upload.wikimedia.org/wikipedia/commons/e/ef/Dimetrodon.jpg[/img] Synapsids > Diapsids
[url]http://qilong.wordpress.com/2014/07/10/really-again-youve-got-to-be-fucking-kidding-me/[/url] Just in case you happen to come across the media hyping a "revolutionary development".
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