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I Know Dino Podcast Present Notes: Mapusaurus (Episode 70)


    Episode 70 is all about Mapusaurus, one of many largest carnivorous dinosaurs discovered to date.

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    On this episode, we focus on:

    • The dinosaur of the day: Mapusaurus
    • Identify means “earth lizard”
    • Kind species is Mapusaurus roseae, named after the rose-colored rocks the place Mapusaurus was discovered and for Rose Letwin, who sponsored the fossil excavation
    • Lived within the Cretaceous in what’s now Argentina
    • First found in 1995
    • Excavated between 1997 to 2001 as a part of the Argentinian-Canadian Dinosaur Mission
    • Phil Currie and Rodolfo Coria described Mapusaurus in 2006
    • Discovered within the Huincul Formation, which was an arid surroundings
    • Bone mattress with Mapusaurus had a minimum of seven people (totally different ages); could also be due to a predator lure or as a result of they lived collectively
    • Bone mattress could have been a results of the bones being carried downstream in a flood (no different dinosaurs discovered within the bone mattress)
    • They might have hunted in packs, however it’s unclear for sure
    • Different websites have been discovered with many carnivorous dinosaurs in Alberta, Mongolia, and the U.S., which suggests within the Cretaceous there could have been pack conduct
    • Smallest particular person discovered within the bone mattress was 18 ft (5.5 m) lengthy
    • Some as giant as 33 ft (10.2 m) lengthy and weighing 3 tons (some sources say as much as 8 tons); comparable in measurement to Giganotosaurus, a detailed relative
    • Coria and Currie in 2006 stated they discovered bigger femur bones comparable in measurement to a Giganotosaurus that was 40 ft (12.2 m) lengthy and in Drew Eddy and Julia Clarke in 2011 discovered a pubic shaft that was even bigger than the Giganotosaurus so that they stated Mapusaurus could have been so long as 41 ft (12.6 m), and even bigger
    • Mapusaurus stands out as the largest carnivorous dinosaur discovered to date
    • 6 ft (1.84m) lengthy cranium
    • Just like Giganotosaurus however the cranium was just a little totally different (thicker, wider, flatter)
    • Cranium is decrease and lighter than Giganotosaurus
    • Lived alongside Argentinosaurus and Cathartesaura, in addition to the abelisauroids Skorpiovenator and Ilokelesia
    • Unclear what Mapusaurus would have hunted, if it hunted (as an alternative of scavenged)
    • Grownup Argentinosaurus might weigh as much as 100 tons (125 ft or 40 m lengthy); too giant to hunt alone
    • Could have gone after a juvenile Argentinosaurus (as a bunch)
    • Enamel are much like Giganotosaurus (flat, curved with a serrated edge, that are good for slicing, in comparison with T-rex which had conical tooth, good for crunching bone)
    • Could haven’t been capable of chew by means of Argentinosaurus bone (as a pack, a number of bites so Argentinosaurus would lose blood or get contaminated), then they might eat it when it’s weaker
    • From 2013: Palaeopathological Survey of a Inhabitants of Mapusaurus (Theropoda: Carcharodontosauridae) from the Late Cretaceous Huincul Formation, Argentina on PLOS One: Scientists studied all of the Mapusaurus discovered within the bonebed and regarded for illnesses and trauma (paleoepidemiology). They discovered two damaged and re-healed ribs (led an lively way of life, however no skeletal abnormalities (to date, research of theropods present low numbers of abnormalities)
    • Mapusaurus is a carcharodontosaurid
    • Carcharodontosaurids (title means “shark-toothed lizards) have been carnivorous theropods
    • Ernst Stromer named the household in 1931
    • Household contains Giganotosaurus, Mapusaurus, Carcharodontosaurus, and Tyrannotitan (all about identical measurement or bigger than T-rex)
    • Carcharodontosaurids and spinosaurids have been the biggest predators in Gondwana within the early and center Cretaceous
    • Mapusaurus is a part of the subfamily Giganotosaurinae (carcharodontosaurids extra intently associated to Giganotosaurus and Mapusaurus than Carcharodontosaurus)
    • Enjoyable reality: In line with Nationwide Geographic cassowaries and Harpy eagles have the longest claws of any dwelling chicken at about 4 to five in (~10-13 cm) lengthy. However these claws are literally two elements, a bone after which a pointy keratin overlaying excessive. Claw sheaths not often fossilize since they’re made out of keratin so we’re normally simply left with the bone beneath the claw sheath. So whenever you go to a museum and see a mounted skeleton, until they add an extrapolated sheath to the fossil you’re seeing a claw that’s considerably shorter, and certain extra boring, than the total claw would have been.