Fossilsforever Posted January 25, 2023 Share Posted January 25, 2023 Hello all, Most of the belemnite hooks are found in Jurassic sediments (Germany, UK). Does anyone know if Cretaceous belemnite hooks are found? (from the Belemnitellidae family?). I know that in one book about the Cretaceous fossils in Rügen (Germany), belemnite hooks/hooklets are present (forgot the title of the book...). Kind regards, Ruben Link to comment Share on other sites More sharing options...
rocket Posted January 25, 2023 Share Posted January 25, 2023 (edited) Onychiten-Cephalopoda-Coleoidea-aus-der-Schreibkreide-Unter-Maastrichtium-der-Insel-Ruegen-Ostsee-Onychites-Cephalopoda-Coleoidea-from-the-White-Chalk-Early-Maastrichtian-of-the-Isle-of-Ruegen.pdf (researchgate.net) The book you mean I think is reich_frenzel2002fauna_flora_rugen.pdf (ginras.ru) Onychites are rare in cretaceous sediments, do not know why I found some in upper cretaceous sediments of Beckumer Berge, Coesfeld and lower cretaceous tonstein from northwestern Germany e.g. Drei weitere Onychiten aus der nordwestdeutschen Unterkreide | SpringerLink mitteilungen-gpi-1-90.pdf (uni-hamburg.de) (year 1992, Engeser & Suthhof) and some more Edited January 25, 2023 by rocket 1 1 Link to comment Share on other sites More sharing options...
Al Dente Posted January 25, 2023 Share Posted January 25, 2023 1 hour ago, Fossilsforever said: Does anyone know if Cretaceous belemnite hooks are found? (from the Belemnitellidae family?). I believe I have found them in the Peedee Fm. (Maastrictian) of North Carolina. The ones I've found are either from a Belemnite (onychites) or they might be a type of scolecodont that resembles an onychite. I'll have to dig through my collection to find them. 1 Link to comment Share on other sites More sharing options...
Fossilsforever Posted January 30, 2023 Author Share Posted January 30, 2023 Very interesting! Link to comment Share on other sites More sharing options...
Al Dente Posted January 31, 2023 Share Posted January 31, 2023 9 hours ago, Fossilsforever said: Very interesting! I looked through part of my collection. I managed to find one. This is a very rough looking one. I have a few more that are smooth and shiny, but I haven’t located them yet. I made the claim that it might be from a belemnite but now I realize it could be from some other type of cephalopod. There are a couple Enchodus teeth and a Rhinobatos tooth in this photo. The squares are 3.2 mm wide. Link to comment Share on other sites More sharing options...
Fossilsforever Posted January 31, 2023 Author Share Posted January 31, 2023 (edited) It looks like a belemnite hook (perhaps micro-Onychites). The squares are 3.2mm wide so size and shape wise, it is possible (belemnite micro hooks range from 1 a 2-5mm, sometimes 0.3-5mm). They consist of a base, shaft and uncinus. But I can be wrong and the fossil is something else. I do not know if the fossil could be from another Cephalopod (I think it is a belemnite hook or a scolecodont). See for more information (Stevens, 2010) Palaeobiological and morphological aspects of Jurassic Onychites (cephalopod hooks) and new records from the New Zealand Jurassic. https://www.tandfonline.com/doi/full/10.1080/00288306.2010.526548 Another interesting paper is from Lehmann, Jens & Solarczyk, Alexandra & Friedrich, Oliver. (2011). Belemnoid arm hooks from the Middle-Upper Albian boundary interval: Taxonomy and palaeoecological significance. Paläontologische Zeitschrift. 85. 287-302. 10.1007/s12542-010-0092-7. Edited January 31, 2023 by Fossilsforever 1 Link to comment Share on other sites More sharing options...
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