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  2. Helicoprion - Wikipedia

    en.wikipedia.org/wiki/Helicoprion

    The relationship between Helicoprion and living chimaeras is very distant, but had been previously suspected based on details of its tooth anatomy. [3] More specifically, Helicoprion can be characterized as a member of Eugeneodontida, an order of shark-like euchondrocephalans that lived from the Devonian to Triassic periods. Eugeneodonts have ...

  3. Helicoprionidae - Wikipedia

    en.wikipedia.org/wiki/Helicoprionidae

    The anatomy of the tooth-whorls vary between taxa, with some possessing highly specialized, coiling spirals (such as those of the namesake genus Helicoprion), while others such as Sarcoprion and Parahelicoprion possessed shorter whorls. [2]

  4. Romerodus - Wikipedia

    en.wikipedia.org/wiki/Romerodus

    The Idaho Museum of Natural History displayed murals and a life-sized replica of Helicoprion davidsii, [31] which featured body proportions and anatomy inspired by well preserved caseodonts such as Romerodus. The paintings and design of the animal were realized by Alaskan illustrator Ray Troll and sculptor Gary Staab. [14]: 169

  5. Ornithoprion - Wikipedia

    en.wikipedia.org/wiki/Ornithoprion

    Because of its phylogenetic proximity, Ornithoprion has been used as a basis for restoring the anatomy and physiology of other eugeneodonts. Ray Troll, an Alaskan illustrator, has cited the taxon as one of his references while reconstructing the potential close relative and more widely publicized genus Helicoprion.

  6. Eugeneodontida - Wikipedia

    en.wikipedia.org/wiki/Eugeneodontida

    Helicoprion bessonovi, teeth at the front of the lower jaw (reversed for more natural position) Restoration of Romerodus (Caseodontidae). The Eugeneodontida, sometimes also called Eugeneodontiformes, is an extinct and poorly known order of cartilaginous fishes.

  7. File:Helicoprion diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Helicoprion_diagram.svg

    English: Diagram of the "tooth whorl" of Helicoprion, showing the shape of the teeth, redrawn from figure 2 of "Saws, Scissors, and Sharks: Late Paleozoic Experimentation with Symphyseal Dentition" by Leif Tapanila Jesse Pruitt Cheryl D. Wilga Alan Pradel

  8. 2013 in paleoichthyology - Wikipedia

    en.wikipedia.org/wiki/2013_in_paleoichthyology

    Reassessment of the anatomy of Helicoprion and a study on the phylogenetic relationships of this taxon is published by Tapanila et al. (2013). [10]Fossils of cladodontomorph chondrichthyans (a falcatid, a ctenacanthiform and cladodontomorphs of uncertain phylogenetic placement) are described from the Early Cretaceous (Valanginian) of France by Guinot et al. (2013); this is the most recent ...

  9. Wikipedia:WikiProject Palaeontology/Paleoart review/Archive 14

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    Helicoprion postcrania is not fully known, but other eugeneodonts are known to have five or six shark-like gill slits, not a fleshy chimaera-like operculum. That may have simply been an over-correction based on the confirmation that eugeneodonts were holocephalans.