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Showing results for tags 'ophthalmosauridae'.
pachy-pleuro-whatnot-odon posted a topic in Fossil IDHi 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 ) 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
DD1991 posted a topic in DocumentsA new ichthyosaur-related paper is available online: Nikolay G Zverkov and Megan L Jacobs. 2020. Revision of Nannopterygius (Ichthyosauria: Ophthalmosauridae): reappraisal of the ‘Inaccessible’ holotype resolves a taxonomic tangle and reveals an obscure ophthalmosaurid lineage with a wide distribution. Zoological Journal of the Linnean Society zlaa028. DOI: 10.1093/zoolinnean/zlaa028 The description of Nannopterygius borealis from the Arctic circle and the synonymization of the Kimmeridgian-Tithonian genera Paraophthalmosaurus and Yasykovia with Nannopterygius offers ne