Dystrophaeus

Name: Dystrophaeus ‭(‬bad Joint‭)‬.
Phonetic: Diss-tro-fay-us.
Named By: Edward Drinker Cope‭ ‬-‭ ‬1877.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Saurischia,‭ ‬Sauropoda,‭ ‬Diplodocidae.
Species: D.‭ ‬viaemalae (type).
Diet: Herbivore.
Size: Estimated about‭ ‬14-15‭ ‬meters long.
Known locations: USA,‭ ‬Utah‭ ‬-‭ ‬Morrison Formation.
Time period: Kimmeridgian‭? ‬of the late Jurassic.
Fossil representation: Partial post cranial skeleton.

       One of many diplodocid sauropods of the Morrison Formation‭ (‬with other genera including Diplodocus,‭ ‬Apatosaurus and Suuwassea amongst others‭)‬,‭ ‬Dystrophaeus has been the source of a lot of confusion.‭ ‬Edward Drinker Cope,‭ ‬the person who first named Dystrophaeus,‭ ‬thought that the animal belong in the much earlier Triassic period,‭ ‬while Othniel Charles Marsh regarded it as a stegosaur.‭ ‬Away from the‭ ‘‬Bone Wars‭’‬,‭ ‬and another famous palaeontologist,‭ ‬Friedrich von Huene thought that it was a herbivorous theropod,‭ ‬before realising that it was actually a sauropod,‭ ‬but again missed the mark by saying that it was similar to‭ ‬Cetiosaurus.‭ ‬Alfred Romer,‭ ‬another famous for his work in the field of palaeontology considered Dystrophaeus to be a brachiosaurid sauropod,‭ ‬before David Gillette came to the most recent analysis that Dystrophaeus‭ ‬was a‭ ‬diplodocid sauropod.‭ ‬To top all that off,‭ ‬there is uncertainty over the exact time placement for Dystrophaeus within the late Jurassic,‭ ‬while some have suggested that the fossils of Dystrophaeus are too indeterminate too classify a distinct genus,‭ ‬and therefore Dystrophaeus should be regarded as a Nomen dubium.

Further reading
-‭ ‬On a dinosaurian from the Trias of Utah.‭ ‬-‭ ‬Proceedings of the American Philosophical Society‭ ‬16:‭ ‬579-584.‭ ‬-‭ ‬Edward Drinker Cope‭ ‬-‭ ‬1877.
-‭ ‬Dystrophaeus viaemalae Cope in neuer Beleuchtung.‭ ‬-‭ ‬Neues Jahrbuch für Mineralogie,‭ ‬Geologie und Paläontologie‭ ‬19:‭ ‬319-333.‭ ‬-‭ ‬Friedrich von Huene‭ ‬-‭ ‬1904.
-‭ ‬Origin and early evolution of the sauropod dinosaurs of North America‭ ‬--‭ ‬the type locality and stratigraphic position of Dystrophaeus viaemalae Cope‭ ‬1877.‭ ‬In:‭ ‬A.‭ ‬C.‭ ‬Huffman,‭ ‬W.‭ ‬R.‭ ‬Lund‭ & ‬L.‭ ‬H.‭ ‬Godwin‭ (‬eds‭)‬,‭ ‬Geology and resources of the Paradox Basin,‭ ‬Utah Geological Association Guidebook,‭ ‬25:‭ ‬313-324.‭ ‬-‭ ‬D.‭ ‬D.‭ ‬Gillette‭ ‬-‭ ‬1996.
-‭ ‬Stratigraphic position of the sauropod Dystrophaeus viaemalae Cope and its evolutionary implications.‭ ‬-‭ ‬In:‭ ‬Michael Morales,‭ ‬editor,‭ ‬The continental Jurassic,‭ ‬Museum of Northern Arizona Bulletin‭ ‬60:‭ ‬59-68.‭ ‬-‭ ‬D.‭ ‬D.‭ ‬Gillette‭ ‬-‭ ‬1996.



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