Beak

[Hajar]

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

 

[Architeuthoceras]

Great beak fossil Hajar! And thanks for the link.

 

[Hajar]

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.

 

[Damien]

very interesting stuff.

 

[Hajar]

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

 

[Hajar]

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

 

[Architeuthoceras]

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

 

[Hajar]

I'd guess it's the original calcite.

 

[Hajar]

A new Klug et al. paper on the beaks of Plesioteuthis.

 

[POD-L]

beak



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

 

[Hajar]

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.

 

[Architeuthoceras]

This old thread discusses the beak of Yezoteuthis

 

[Hajar]

Thanks. I like the photo of the Yezoteuthis beak next to one from an Architeuthis.

 

[POD-L]

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)

 

[POD-L]

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)