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I Know Dino Podcast Present Notes: Miragaia (Episode 116)


    Episode 116 is all about Miragaia, a stegosaurid with an extended neck.

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    On this episode, we talk about:

    • The dinosaur of the day: Miragaia
    • Stegosaurid that lived within the Jurassic in what’s now Portugal
    • Named after the space the place the fossils had been discovered
    • Identify can also be in reference to mira, which suggests great in Latin, and Gaia, the earth goddess
    • Identify means “great goddess of the Earth”
    • Discovered after a highway was constructed between the villages Miragaia and Sobral
    • Discovered the anterior half and partial cranium (different half probably destroyed throughout development
    • Described in 2009 by Octávio Mateus, Susannah Maidment and Nicolai Christiansen
    • Miragaia is the primary acknowledged stegosaur cranium present in Europe (earlier than, solely bits and items had been discovered)
    • Alberto Cobos and others in 2010 urged Miragaia was a junior synonym of Dacentrurus (which lived in England)
    • Sort species is Miragaia longicollum
    • Species identify means “lengthy neck”
    • About 18-20 ft (5.5-6 m) lengthy, although Gregory Paul estimated it was 6.5 m lengthy and weighed 2 tons
    • Had a really lengthy neck (not less than 17 vertebrae), which is a part of a pattern of longer necks in stegosaurs
    • Miragaia is a part of the clade Thyreophora, whose older members had 9 vertebrae. Then later ones, Stegosaurus and Hesperosaurus, had 12-13 vertebrae
    • Had the longest neck of any stegosaur, and extra cervical vertebrae than many sauropods
    • Neck vertebrae had been longer than vertebrae in different stegosaurs
    • Longer neck is convergent evolution with sauropod necks lengthening
    • Neck elongation might happen 3 ways: incorporating dorsal vertebrae into the neck (backbones moved ahead and have become a part of the neck), including new cervical components to the vertebral column, and lengthening of particular person cervical vertebrae
    • Scientists assume all three of this stuff led to sauropods having lengthy necks
    • Due to its lengthy neck, Miragaia might have been in a position to eat meals different herbivores couldn’t attain. The neck might also have helped to draw mates (although it’s not clear precisely why it had such an extended neck)
    • Giraffes are the one residing mammals with lengthy necks, and scientists assume it was as a result of lengthy necks attracted mates (similar as with sauropods)
    • Had lengthy forelimbs
    • Had a toothless beak, like Stegosaurus
    • Had a notch within the snout tip that was formed like a W (in Stegosaurus that notch is U-shaped)
    • Had ornamentation on the supper a part of the nasal bone
    • Had 16 enamel within the maxilla
    • Could have used its rear legs to rear up and attain excessive branches, however not recognized for certain since these bones are lacking
    • Had spikes and plates, with eight paired plates
    • Had an extended, slim spike that was regarded as a shoulder backbone, however now’s regarded as a part of the tail
    • Tail is unknown
    • Can see a reconstruction of Miragaia on the Museum of Lourinha in Portual (mixture of actual fossil and casts)
    • A part of the clade Dacentrurinae, inside Stegosauridae (sister group to Stegosaurus), and consists of Dacentrurus
    • Stegosauridae is a household of thyreophoran dinosaurs
    • Contains stegosaurs extra carefully associated to Stegosaurus than Huayangosaurus
    • Lived into the late Cretaceous
    • Had rows or osteoderms alongside their neck, trunk, and tail (plates and spikes, used for show, thermoregulation, and protection)
    • Had entrance legs shorter than rear legs, (highly effective however gradual)
    • May shear small branches
    • Skulls are shallower than early stegosaurs
    • Two subfamilies: Dacentrurinae and Stegosaurinae
    • Stegosaurinae are bigger
    • Enjoyable reality: When excavating dinosaur bones, paleontologists usually don’t have the posh of amassing all the pieces. That may be attributable to: transportation limits (in the midst of nowhere), time restrictions on excavating, or assortment house limitations the place there simply isn’t house for packing containers and packing containers of microfossils. So as a substitute paleontologists usually have to pick essentially the most vital fossils to take away, and depart others.

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