Beak

Discussion in 'Cephalopod Fossils' started by Hajar, Dec 14, 2009.

  1. Hajar

    Hajar Haliphron Atlanticus Registered

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    Here is a Triassic Germanonautilus beak from Wollmersheim, Germany (found on ebay). The upper jaw Rhyncholithes is 20 mm long and the lower jaw Conchorhynchus is 14 mm long. This paper by the prolific Christian Klug explains: http://app.pan.pl/archive/published/app46/app46-043.pdf
     

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  2. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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    Great beak fossil Hajar! And thanks for the link.
     
  3. Hajar

    Hajar Haliphron Atlanticus Registered

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    There's a new paper (Klug, C., Schweigert, G., Fuchs, D. & Dietl, G. 2009: First record of a belemnite preserved with beaks, arms and ink sac from the Nusplingen Lithographic Limestone (Kimmeridgian, SW Germany). Lethaia, 10.1111) showing beaks of Late Jurassic cephalopods.

    Here's their Figure 7 showing beaks of a nautilid, an ammonite, a vampyropod coleoid and a belemnite. Very nice.
     

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  4. Damien

    Damien O. vulgaris Registered

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    very interesting stuff.
     
  5. Hajar

    Hajar Haliphron Atlanticus Registered

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    A couple of Lebanese Cretaceous beaks.. Rachiteuthis donovoni and Allocrioceras.
     

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  6. Hajar

    Hajar Haliphron Atlanticus Registered

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    The top one is about 6 mm tall and the aptychus about 5 mm long.
     
  7. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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    Nice fossils again Hajar! Do you know if the aptychus is a replacement or original material?
     
  8. Hajar

    Hajar Haliphron Atlanticus Registered

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    I'd guess it's the original calcite.
     
  9. Hajar

    Hajar Haliphron Atlanticus Registered

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  10. POD-L

    POD-L O. bimaculoides Registered

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    beak



    Here are figures of a Cretaceous Vampyromorph from Vancouver Island
    Tanabe et al 2009
     

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  11. Hajar

    Hajar Haliphron Atlanticus Registered

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    Thanks! Are these the beaks mentioned by Phil Eyden here?

    I just found this by Tanabe and co-workers. That's a really large upper jaw they describe (97 mm) and they write, ""This new taxon would have been as large as the modern giant squid Architeuthis, which commonly exceeds .. 5 m in body length. Our study postulates that studies of jaws are important to reconstruct the phylogeny of the Coleoidea.
     
  12. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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  13. Hajar

    Hajar Haliphron Atlanticus Registered

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    Thanks. I like the photo of the Yezoteuthis beak next to one from an Architeuthis.
     
  14. POD-L

    POD-L O. bimaculoides Registered

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    Sorry my pictures were of Nanaimoteuthis jeletzyi from "Late Cretaceous Octobrachiate Coleoid Lower Jaws from the North Pacific Regions" Tanabe et al 2008 JPaleont.,82(2)
    :)
     
  15. POD-L

    POD-L O. bimaculoides Registered

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    Sorry my pictures were of Nanaimoteuthis jeletzyi from "Late Cretaceous Octobrachiate Coleoids Lower Jaws from the North Pacific Regions" Tanabe et al 2008 JPaleont.,82(2)
    :)
     
  16. Hajar

    Hajar Haliphron Atlanticus Registered

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    Nice to see the 3D preservation as opposed to the crushed state of the German and Lebanese material.
     
  17. POD-L

    POD-L O. bimaculoides Registered

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    Hajar
    I tried to link the whole paper but it was too big? We not only found vampyromorphs but also octopod beaks!!
     
  18. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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  19. POD-L

    POD-L O. bimaculoides Registered

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  20. POD-L

    POD-L O. bimaculoides Registered

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    triassic ceratite

    Here is a triassic ceratite from Germany

     

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