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Showing results for tags 'hooks'.
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I just got an awesome coprolite. I generally hate those things, and would never pay money for one, but I came across this one and it has so many visible identifiable remains, I couldn't help being really impressed. Ive always wanted to see a coprolite that had clear remains in it. Sadly they're much smaller and harder to see in person than in these pictures, so I can only use these display pictures for the time being, until I take a magnified look. There's clearly fish scales, seemingly from different types of fish, and apparently squid hooks and such. I'm excited to find a good illuminated magnifying glass and really studying it up close:) Maybe even a microscope to take a closer look!
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From the album: Marine reptiles and mammals
Close up of the stomach contents-
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- beaks
- cephalopod
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From the album: Marine reptiles and mammals
These are the reverse sides of the slabs-
- beaks
- cephalopod
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From the album: Marine reptiles and mammals
Cross sections of the stomach, full of squid/cephalopod hooks and beaks, of an early Jurassic ichthyosaur (Stenopterygius quadriscissus). One slice has the animals ribs, the lighter tan objects, around the stomach, while the other is entirely of the stomach contents.-
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This coprolite is from a marine creature that swam in the Jurassic seas that once covered this parts of England. The dark inclusions that can be seen on the surface are Onychites (cephalopod hooks). In April 2016, the University of Minnesota X-ray Computed Tomography Lab scanned the specimen using a X5000 high resolution microCT system with a twin head 225 kV x-ray source and a Dexela area detector (3073 x 3889 pixels). Many of the images shown here are of individual 3D elements/features within the coprolite that were separated/isolated using Blob3D. The taxonomic classification given is for the inclusions, not the coprolite. Aside from the hooks, it is hard to definitively identify the inclusions without damage to the coprolite. The following is a list of inclusions: 241 hooks of various sizes that are at least 75% intact. 200+ plate-like fragments of various sizes (likely similar to the surface nacre). 19 ellipsoidal structures, possibly forams or parasite eggs. 2 unidentified long, straight conical structures joined at wide end (A) 1 long rod-like structure with a bulbous end (B) 1 unidentified mass that looks like it was the attachment point for 5 rod-like structures (C) 1 1ong cylindrical (rod) structure that tapers in the center. The center density is much lower than the outer shell (D) 1 irregular structure that looks I originally thought might be an ink sack or buccal mass, but the size is wrong. Experta think it is more likely foraminifera (E) 1 irregular structure, possibly a statolith (F) Acknowledgements: Thank you to Neale Monks and Christian Klug for providing input.
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- cambridgeshire
- cephalopod
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Acanthoteuthis speciosa Wagner in Muenster, 1839
oilshale posted a fossil in Coleoids (Belemnites, Squid)
Acanthoteuthis is now considered as a member of the Belemnotheutida, a suborder of the Belemnitida. The ink sack suggests that this species lived not deeper than 200m. References: Dirk Fuchs, Sigurd von Boletzky and Helmut Tischlinger (2010): New evidence of functional suckers in belemnoid coleoids (Cephalopoda) weakens support for the 'Neocoleoidea' concept. Journal of Molluscan Studies 76(4):404-406 · October 2010-
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- acanthoteuthis
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I had this little coprolite from the Oxford Clay, Orton Pit, Peterborough, Cambridgeshire, England, scanned by the University of Minnesota X-ray Tomography Lab. Some cephalopod hooks were visible on the surface under magnification. I was amazed by the number of hooks that were revealed by the micro CT scan. Here is what was visible on the surface:
- 44 replies
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- Cephalopod
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