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Found 9 results

  1. pachy-pleuro-whatnot-odon

    Preservation of colour in fossil shells

    Hi all, Some time ago I found this shell in (what I believe to be) the French Upper Muschelkalk (Triassic). Now I'm not into shells myself, but to judge from the remains of operculum on the underside of it, the specimen concerns an oyster. Most strikingly, however, the shell has a pattern of darker-coloured lines that do not correspond to any three-dimensional/elevational differences on the shell surface - which is, in fact, entirely flat. I haven't seen this on a fossil shell before. Now when doing a Google search for my response on whether it would be possible for crustacean carapaces to retain traces of their original colour, I bumped into an article that described that molluscs may incorporate melanin in the calcite of their shells to create the colour patterns we see (e.g., here). This got me wondering: could the lines I'm seeing indeed be traces of the original melanin pigmentation of this shell? And, if so, how common is this phenomenon? Does anybody else have examples of such shells? I'd also be very happy if someone could furnish me with a genus or species name to go with my specimen. But here I'd like to primarily raise the topic of ancient colour reconstruction in shells.
  2. Daniel1990

    Muschelkalk coprolite?

    Hi It is coprolite? Found: Muschelkalk,Poland,Trias Thank you and best wishes
  3. Hi everyone! I have just returned from a fieldschool to Poland which was organized by the BVP (Belgium Society for Paleontology) in association with the Universities of Opole and Gdansk. The fieldschool started on the 9th july and ended on july 17. The first 2-3 days of the trip took place in the historic city of Gdansk which lies by the Baltic Sea where the main focus was on Baltic Amber. This included lectures, workshops, a small museum tour and some trips to the beach in search for amber. For the 2nd part of the trip we travelled to the south towards Opole and more specifically the Jurapark and digsite in Krasiejow where we had multiple lectures, workshops, and fieldwork in both Krasiejow and other quarries in the area. So in this topic I wanted to make a day by day report on this amazing trip and experience. Since we travelled by car I only returned yesterday evening so most of the finds still have to be photographed/prepped so expect them somewhere at the end of this topic (which might also take a few days to complete.)
  4. pachy-pleuro-whatnot-odon

    Middle Triassic ichthyosaur vertebra

    Early June, two years ago, I found this ichthyopterygian vertebra in a small nodule out of the northern French Middle Triassic, from the Upper Muschelkalk. Almost two years to the day later a friend of mine helped me complete its preparation this month. When done, one of the first things that struck me were the elongate, and slightly tilted rib attachment sites. As far as I know, such rib attachment sites do not occur in any parvipelvian ichthyosaur species, which, instead, have round, button-like, attachment sites, especially on dorsal vertebrae as my find is. Now I realise that ichthyosaur vertebrae typically hold very little diagnostic value, but I was wondering whether the peculiar rib attachments might be indicative of a super-family, family or even genus, so that I can label the vertebra more informatively than "indet. basal ichthyopterygia". Nothing is known of the species at the sites where I found this, though, based on size alone, Cymbospondylus sp. seems like a good candidate. Any other ideas? @Pemphix @sander @paulgdls @Welsh Wizard @Crazyhen Dimensions of the specimen: 41mm (diameter) x 21 (depth)
  5. Kurczak

    muschelkalk reptile footprint?

    Hi Is this reptile footprint fossil? Age : Muschelkalk,Middle triassic location :Poland
  6. pachy-pleuro-whatnot-odon

    Lets talk... Blezingeria

    First off: happy new year, everyone! Blezingeria ichthyospondylus is an enigmatic marine reptile from the Ladinian-stage Triassic, Upper Muschelkalk of Baden-Württemberg in southwestern Germany, first discovered in Crailsheim. Although various material has been referred to the species through time, its affiliation remains unclear. Initially described as nothosaurian and later as cymbospondylid ichthyosaurian, it has most recently been classed as thalattosaurian. Fossilworks, however, still defines it as cymbospondylid, whereas Muschelkalk.eu classifies it as an Eosuchian. Below is an overview of some of the material that has been attributed to the species: Source: Wikipedia Vertebrae & humerus. Source: Wikimedia Commons Source: Muschelkalkmuseum Ingelfingen Vertebrae & scapula. Source: Muschelkalk.eu As you can see, the vertebrae are amphicoelous, just like those of ichthyosaurians. Though, contrary to in ichthyosaurs, the neural arch in B. ichthyospondylus is attached to the vertebral body. Scapulae and pubis bones are also highly reminiscent of those found in ichthyosaurs. All this, of course, is not to say that there were no other early marine reptiles with amphicoelous vertebrae - such as those of Placodus gigas figured below, for example: Sources: online vendor & figure 13 from Diedrich, 2013. Review of the Middle Jurassic "sea cow" Placodus gigas (Reptilia) in Pangea's shallow marine macroalgae meadows of Europe At the same time, and in the same area, true ichthyosaurs were also already around, and already had characteristic their amphicoelous vertebrae free of neural arch, including such species as Cymbospondylus sp., Phantomosaurus sp. - which, according to Fossilworks, are sister taxa to B. ichthyospondylus - and, possibly, Pessosaurus sp., to which the below Middle Triassic vertebra has tentatively been ascribed: Source: Muschelkalkmuseum Ingelfingen The most comprehensive overview of Blezingeria ichthyospondylus material, however, comes from Diedrich, 2015. The vertebrates from the Lower Ladinian (Middle Triassic) bonebed of Lamerden (Germany) as palaeoenvironment indicators in the Germanic Basin (figure 9): Looking at the above image, the similarities with ichthyosaur skeletal material is indeed no longer obvious, which is reflected in the reconstruction, though there are still similarities to be found in the bone morphology of B. ichthyospondylus' fibula (no. 11 in the image above) and the Utatsusaurus sp. (primitive ichthyosaur) paddle in the diagram below: Figure 4 from Motani, 2005. Evolution of Fish-Shaped Reptiles (reptilia: Ichthyopterygia) in Their Physical Environments and Constraints The only cladistic data I can find on the interrelationships between thalattosauria, ichthyopterygia and sauropterygia, however, comes from the Pterosaur Heresies and Reptile Evolution - and, therefore, doesn't derive from the most reliable sources - lacks documented source references, and seems, at least in part, internally contradictory: Not having read Diedrich 2015 yet, my first question is, is there any more information on Blezingeria ichthyospondylus out there on easily accessible media (i.e., the internet, preferably open access)? Does anyone on TFF know about this species, and what is there to know about this species? Where does it fit in phylogenetically, and how does this relate to the other clades of marine reptile? Is there any merit to the above cladograms? Thanks for your help!
  7. Hi. They were found in Muschelkalk facies of Ladinian. Bony remains of nothosaurs and placodontos appear in the area. In a book they appear classified as placodontos teeth, but I would like to specify more. Thank you.
  8. https://www.eurekalert.org/pub_releases/2019-01/uob-fdi011419.php
  9. Anomotodon

    Partial Anarosaurus skeleton

    From the album: Dinosaurs and Reptiles

    Partial skeleton of a Middle Triassic marine reptile Anarosaurus (relative of Keichousaurus) from Muschelkalk, Germany. B, C, F, G, H - close-ups of various limb bones and vertebrae D - 2 Anarosaurus teeth E - fish scale I - Nothosaurus mirabilis (?) tooth The last two finds make me think that it is actually a Nothosaurus coprolite with digested Anarosaurus remains and various fish scales.
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