Genus of giant Ichthyosaurs: Ichthyotitan
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Questions and Answers

What is the estimated body length of Ichthyotitan?

  • nearly 25 metres (correct)
  • 30 metres
  • 20 metres
  • 15 metres

    • In which geological formation was Ichthyotitan found?

  • Triassic-Jurassic Formation
  • Rhaetian Formation
  • Westbury Shale Formation
  • Westbury Mudstone Formation (correct)

    • What is the name of the only species within the genus Ichthyotitan?

  • I.latis
  • I.severnensis (correct)
  • I.gigas
  • I.magnus

    • When was the genus Ichthyotitan considered to have gone extinct?

    <p>During the Triassic-Jurassic extinction event</p> Signup and view all the answers

    What is the significance of the discovery of Ichthyotitan?

    <p>It provides evidence that shastasaurids were still thriving until the Triassic-Jurassic extinction event</p> Signup and view all the answers

    What is the current classification of Ichthyotitan?

    <p>A genus of ichthyosaur within the family Shastasauridae</p> Signup and view all the answers

    How many specimens are known to belong to the species I.severnensis?

    <p>2 fragments of surangular bones</p> Signup and view all the answers

    Who discovered the first specimen of Ichthyotitan in 2016?

    <p>Paul de la Salle</p> Signup and view all the answers

    What prompted the authors to reinterpret large bones in Aust Cliff?

    <p>Discovery of Ichthyotitan holotype specimen</p> Signup and view all the answers

    Where was the known smaller jaw fragment from a giant ichthyosaur discovered?

    <p>Lilstock, UK</p> Signup and view all the answers

    What was a key feature of the Ichthyotitan holotype specimen that indicated it was still growing?

    <p>Histological features</p> Signup and view all the answers

    What is the meaning of the specific name 'severnensis' in 'Ichthyotitan severnensis'?

    <p>Reference to the type locality near the Severn Estuary</p> Signup and view all the answers

    Why is Ichthyotitan considered unique among giant ichthyosaurs found in the Rhaetian?

    <p>Estimated to be 25% larger by direct scaling</p> Signup and view all the answers

    What distinguishes the Cuers specimen from the specimen discovered in Lilstock?

    <p>Fragmentary remains found in separate excavations</p> Signup and view all the answers

    Which of the following led to the reevaluation of bones in the nearby Aust Cliff?

    <p>Discovery of BRSMG Cg3178</p> Signup and view all the answers

    What distinguishes Ichthyotitan's lineage from later ichthyosaurs according to the text?

    <p>Extinction immediately after the Triassic-Jurassic event</p> Signup and view all the answers

    What distinguishes Ichthyotitan from other shastasaurids in terms of bone anatomy?

    <p>Its surangular bone is spatulate at its posterior end and shows an almost 90-degree upwards turn.</p> Signup and view all the answers

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