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Episode 252: Sauropods squishing turtles


    Episode 252 is all about Dacentrurus, A large-hipped stegosaur from the Jurassic in England.

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    On this episode, we focus on:


    • The Japanese “Mukawa dinosaur” now has an official identify, Kamuysaurus japonicus supply
    • A brand new research reveals how T. rex warmed up utilizing a specialised space on high of its head supply
      • Brian Engh used this analysis to create a tremendous thermal-image illustration supply
    • A marine turtle that received trampled by a sauropod in what’s now Switzerland supply
    • For these holding tabs, the Dinosaurs of Utah PDF has been up to date to incorporate extra species of dinosaurs (now >115) supply
    • Right here’s The Journey’s record of 10 dinosaur locations to go to supply
    • Jurassic Park and Jurassic World memorabilia will probably be auctioned off in London supply
    • Crystal Palace dinosaurs had an open day on September 15 supply
    • Magic Leap just lately launched a Dinosaur Equipment, which helps you to assemble dinosaur skeletons from scattered bones—when you’ve got the $2,000+ headset supply
    • A maid of honor wore an inflatable T. rex costume to her sister’s wedding ceremony supply

    The dinosaur of the day: Dacentrurus

    • Stegosaur that lived within the Jurassic in what’s now England
    • Not a lot recognized about its look
    • Dacentrurus was strong
    • Quadrupedal herbivore
    • Had plates and spikes
    • Some estimates as giant as 33 ft (10 m) lengthy and weighed as much as 5 tons
    • Had a large pelvis, 4.9 ft (1.5 m) extensive
    • Very broad intestine for a stegosaur
    • Had brief hindlimbs however lengthy forelimbs
    • Had related proportions as Stegosaurus however the way in which the plates and spikes regarded was totally different
    • In all probability had two rows of small plates on the neck and two rows of longer spikes on the tail
    • Holotype has a small asymmetrical neck plate
    • Some assume it had a shoulder spike, however it’s unclear
    • Initially was referred to as Omosaurus
    • The identify Omosaurus was already used for a phytosaur, so it was renamed to Dacentrurus in 1902
    • Joseph Leidy had named the phytosaur, Omosaurus perplexus in 1856
    • In 1874, James Shopland from the Swindon Brick and Tyle Firm informed Richard Owen about fossils within the Swindon Nice Quarry
    • Owen despatched William Davies to excavate the specimen, which was in clay. Whereas making an attempt to raise the clay piece, it crumbled
    • Ultimately it made its solution to London (3 tons), and ready by Caleb Barlow
    • Omosaurus armatus was named in 1875, based mostly on a skeleton discovered within the Kimmeridge Clay
    • Described by Owen in 1875 (named Omosaurus armatus), which suggests “higher arm” and refers to its strong humerus
    • The species identify means “armed” in Latin, and refers to a big spike that Owen thought was on the higher arm
    • Holotype features a pelvis, dorsal vertebrae, sacrals and caudal vertebrae, proper femur, left forelimb, partial fibula, partial tibia, proper neck plate and left tail spike
    • Many different species named, however not thought-about legitimate
    • Different species that have been named (and not thought-about legitimate) included Omosaurus hastiger (named by Owen, and which suggests “spike bearer” or “lance wielder” as a result of Owen thought there have been spikes on the wrist), Omosaurus durobrivensis (named by John Hulke in 1887 however was renamed as Lexovisaurus in 1956), Omosaurus phillipsii (named by Harry Seeley in 1893 based mostly on a femur), Omosaurus vetustus (named in 1910 by Friedrich von Huene based mostly on a femur, the identify means “the traditional one” and is now Eoplophysis), Omosaurus lennieri (named in 1911 by Franz Nopcsa based mostly on a partial skeleton present in 1899 in Normandy, France, however that specimen was destroyed in 1944, through the allied bombing of Caen)
    • Solely the sort species, Dacentrurus armatus, is legitimate
    • Identify means “tail stuffed with factors”
    • Frederick Augustus Lucas renamed Omosaurus armatus as Dacentrurus armatus in 1902 (identify means “very sharp tail”)
    • In 1915 Edwin Hennig renamed a lot of the Omosaurus species to Dacentrurus
    • However many researchers nonetheless used the identify Omosaurus till the Fifties
    • First stegosaur found (earlier than Stegosaurus)
    • Among the finest recognized stegosaurs from Europe
    • Dacentrurus present in England, France, Portugal, and Spain
    • Many stegosaur discoveries have been referred to Dacentrurus, in addition to eggs present in Portugal
    • Peter Galton within the Nineteen Eighties referred all stegosaur fossils from Late Jurassic deposits in western Europe to Dacentrurus, however in 2008 Susannah Maidment restricted Dacentrurus armatus materials to the holotype, and located most named species to be nomina dubia
    • In 2013, Alberto Cobos and Francisco Gascó described fossils present in Spain as Dacentrurus armatus (discovered two cervical vertebrae, one dorsal vertebra, and one caudal vertebra from one particular person); this discover reveals intra-species variability of Dacentrurus
    • Variability could possibly be due to ontogeny, sexual dimorphism or particular person pathologies

    Enjoyable Truth:
    The mind of Psittacosaurus modified form dramatically because it grew up.

    • Extra