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I Know Dino Podcast Present Notes: Mamenchisaurus (Episode 117)

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    Episode 117 is all about Mamenchisaurus, a sauropod with a neck that makes up half its physique size.

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    On this episode, we focus on:

    • The dinosaur of the day: Mamenchisaurus
    • Sauropod with a extremely lengthy neck (makes up half its physique size)

    • Lived within the Jurassic in what’s now China
    • A number of species, largest one about 115 ft (35 m) lengthy and weighing 50-75 tons
    • Kind species is Mamenchisaurus constructus

    • Mamenchisaurus constructus was round 43-49 ft (13-15 m) lengthy
    • Found in 1952 on a building website in Sichuan, China
    • Discovered a partial skeleton, named in 1954 by C.C. Younger

    • Kind specimen contains an incomplete neck, with 14 vertebra
    • Identify means “Mamenchi lizard” (Mamenchi in Chinese language means horse gate stream/brook)
    • Purported to be named after the place it was discovered, which was a building website subsequent to the Mamingxi ferry crossing, within the Sichuan province in China. However Younger by accident combined up the situation identify and Mamingxi (which suggests horse neighing brook) was mistaken as Mamenxi (horse gate brook)

    • Species named as a result of the fossil was present in a building website
    • A ebook known as The Chronicles of Huayang, written within the Jin Dynasty between 265-317 CE, describes the discovering of “dragon bones” in what’s now the Sichuan Province (a lot of Jurassic fossils, together with Mamenchisaurus bones, have been discovered there), so they could have contributed to folklore about dragons
    • Folks used to imagine dragon bones had medicinal qualities

    • Second species, Mamenchisaurus hochuanensis, was described in 1972. About 72 ft (22 m) lengthy, and its neck was 31 ft (9.3 m) lengthy. Had an entire neck preserved with 19 vertebrae
    • One other Mamenchisaurus hochuanensis specimen present in 2001, and it had a membership tail, in all probability used for protection (different sauropods with membership tails had been Omeisaurus and Shunosaurus
    • One other species, Mamenchisaurus sinocanadorum was described in 1993 (discovered cranium materials and first 4 cervical vertebrae). Had the longest cervical rib of any described sauropod, at 13.5 ft (4.1 m) lengthy (longest species basically, estimated at 115 ft or 35 m lengthy with a neck that’s 56 ft (17 m) lengthy)

    • Mamenchisaurus anyuensis was named in 1996, and was about 69 ft (21 m ) lengthy
    • Mamenchisaurus jingyanensis was named in 1998 and was about 66-85 ft (20-26 m) lengthy
    • Mamenchisaurus youngi was named in 1996 (although initially present in 1989), and is called in honor of Younger. It was 52 ft (16 m) lengthy with a 21 ft (6.5 m) lengthy neck

    • Mamenchisaurus youngi‘s vertebrae above its hips had been fused collectively in a v-shape, so it could have needed to maintain its tail up at a 20 diploma angle
    • One examine from 2013 discovered that Mamenchisaurus youngi might have eaten low vegetation, based mostly on the stiffness of its vertebrae (had a reasonably straight neck posture and was a low browser)
    • One Mamenchisaurus discovered had an injured tail, in all probability as a result of a damaged and re-healed spine damage or an infection that brought on ossified tissue to construct up

    • Lengthy neck means it might eat quite a lot of meals from the identical spot (due to its attain)
    • Had spatula formed enamel, which had been good for consuming giant bunches of leaves
    • Can see an animatronic Mamenchisaurus in Prague, on the Harfa DinoPark

    • Mamenchisauridae is a household of sauropods
    • Named in 1972 by Younger and Zhao, in a paper about Mamenchisaurus
    • Contains Chuanjiesaurus, Eomamenchisaurus, Hudiesaurus, Tienshanosaurus, Omeisaurus, Tonganosaurus

    • Enjoyable reality: Impressed by a reddit put up by JimmyL2014: It’s utterly possible that there have been Mesozoic dinosaurs (non-avian even) that might scoot round a lake like a duck.
      • Many dinosaurs would have been good and buoyant given their pneumaticity
      • We’ve some proof of dinosaurs swimming (i.e. stegosaur transitional prints)
      • They may have used their giant tails and toes (probably webbed) for locomotion

      • Many items of proof that they ate fish
      • A few of them had feathers (though not likely crucial for floating).

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