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Found 2 results

  1. Hi all, First off, this is not my fossil (though I own a large crow of similar morphology), but one I recently bumped into and found particularly curious. Why? Because it's morphology seems to contradict itself. Described as a Polyptychodon interuptus (no longer considered a valid genus; Madzia [2016]) from the Late Jurassic Volga Beds (?) of Stary Oskol, the tooth appears to have enamel folds consistent with what one might expect from an ophthalmosaurid ichthyosaur, such as Platypterygius sp.. The root, however, is smooth and round, with a hollow base, which, unlike the rectangula
  2. A few months ago, I read an article about a Middle Jurassic ichthyosaur from Alaska (Druckenmiller and Maxwell 2013), which demonstrates that ophthalmosaurids traversed the oceans as far north as Alaska. There's also a record of a Triassic ichthyosaur from Alaska. Other than those two records, does anybody else have records of Mesozoic vertebrates from pre-Cretaceous Alaska? Patrick S. Druckenmiller & Erin E. Maxwell (2013)A Middle Jurassic (Bajocian) ophthalmosaurid (Reptilia, Ichthyosauria)from the Tuxedni Formation, Alaska and the early diversification ofthe clade.Geology Magazine (adv
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