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  1. I have just bought these from a collector and the labels are a little jumbled. I have left them in the section they were in if there is a double set in one and no label in another! I have enough labels to go round a little help with where is needed! I can obviously take more photos if required. There is some beautiful ones in here, I am really pleased with them.
  2. From the album: Echinodermata

    5x5cm. cortestudinarium zone Upper Chalk Formation Coniacian Late Cretaceous From Cuckmere, Sussex, England
  3. Ludwigia

    Holaster subglobosus (Leske 1778)

    From the album: Echinodermata

    4x4.5x2.5cm. Turonian Late Cretaceous Paris Basin
  4. I found this Phlycticrioceras trinodosum heteromorph specimen in June of 2018 whilst hunting the middle/upper Coniacian Atco formation. It is the largest fragment of this species that I am aware of, having a whorl height of 51 mm as opposed to 47 mm of the largest fragment I've seen published. This genus is a bigger, rarer, and (mostly) younger cousin of Allocrioceras. I sent pictures of it to Keith Minor and he pointed out that there was also an echinoid sticking out of the specimen, something which I had totally missed! With much of the echinoid still stuck in the living chamber it is hard to get a definitive ID. But because it has such a shallow anterior ambulacra, which gives the anterior end a more smooth rather than definitive heart shape, he ruled out both Mecaster texanus and batensis. He suggested Micraster since the site has a strong European component in both the bivalve and ammonite faunas, and because the periproct side has the right shape. From finding other, although not as well preserved specimens that show similar morphology he appears to be right. I have yet to confirm this ID with Andrew Smith, but either way I think the piece is worth showing. And reading this thread got me thinking about how this could have happened and what effect it could have had on the echinoid's preservation. My thought is that because irregular echinoids lived and today still live most of their lives burrowing in the sediment it is unlikely that it would have crawled into the living chamber, but instead that it was blown into it post-mortem via currents that had dredged it out of the sediment. I already know that this site was a high energy environment from my other finds here so this seems the most likely possibility to me. But because of the fact there is still at least one spine still attached to the specimen it could not have been swept up from the sediment too long after death or all of its hairlike spines would have blown away. I do, however, find it interesting that it is positioned anterior first with its posterior towards the aperture, the position I would expect to see it in if it had indeed crawled into the shell. The specimen is also the best preserved echinoid from this site so far. Despite the ammonites being generally well preserved and not too crushed, most of the echinoids that I have from the site are terribly crushed, flakey, and often infested with rotting pyrite. I think being encapsulated in the chamber very much reduced those effects. Even though the ammonite and the echinoid are a bit crushed, the echinoid would have probably been worse off otherwise. The heteromorph fragment length is 70 mm and the whorl breadth, being a bit crushed, is 13 mm. I would think that this specimen, with its open planispiral coiling, would would have been at least over a foot in diameter when complete. It is the robust (female) morph of the species with a rib index of 5½. For comparison in Fig. 1 I pictured it with my most complete P. trinodosum specimen. From the part of the echinoid that is exposed I can measure 25 mm in length, 25 in width, and a thickness of 8 mm. I have also found abundant yet scattered fish remains at the site, so perhaps one day an ammonite-fish will come my way. But until then, anyone else got ammonite-echinoids to show? Fig. 1. Fig. 2.
  5. From the album: Haute normandie - April 2018

    Last hunt from Normandy cretaceous : best of echinoids
  6. From the album: Senneville-sur-Fécamp

    double micraster decipiens 2 view 3 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  7. From the album: Senneville-sur-Fécamp

    double micraster decipiens 1 view 2 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  8. From the album: Senneville-sur-Fécamp

    double micraster decipiens 1 view 1 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  9. elcoincoin

    Micraster decipiens 2 august 2015

    From the album: Senneville-sur-Fécamp

    Micraster decipiens 2 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  10. elcoincoin

    Micraster decipiens 1 august 2015

    From the album: Senneville-sur-Fécamp

    Micraster decipiens 1 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  11. elcoincoin

    Highlights of august 2015 hunt

    From the album: Senneville-sur-Fécamp

    Highlights of august 2015 hunt
  12. From the album: Senneville-sur-Fécamp

    double micraster decipiens 2 view 2 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  13. From the album: Senneville-sur-Fécamp

    double micraster decipiens 2 view 1 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  14. elcoincoin

    Double micraster decipiens - view 2

    From the album: Senneville-sur-Fécamp

    Double micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  15. elcoincoin

    Groupe view of spet 2015 hunt.

    From the album: Senneville-sur-Fécamp

    Best of my september hunt from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  16. elcoincoin

    Micraster Sp (leskei?)

    From the album: Senneville-sur-Fécamp

    Micraster sp (leskei?) : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  17. elcoincoin

    Double micraster decipiens - view 3

    From the album: Senneville-sur-Fécamp

    Double micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  18. elcoincoin

    Double micraster decipiens - view 1

    From the album: Senneville-sur-Fécamp

    Double micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  19. elcoincoin

    Micraster decipiens - 7

    From the album: Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  20. elcoincoin

    Micraster decipiens - 6

    From the album: Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  21. elcoincoin

    Micraster decipiens - 5

    From the album: Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  22. elcoincoin

    urchins group picture - oursins groupe

    From the album: Senneville-sur-Fécamp

    Micraster decipiens and 1 echinocorys gravesi (center) from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  23. elcoincoin

    micraster decipiens - 1

    From the album: Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  24. elcoincoin

    micraster decipiens - close up

    From the album: Senneville-sur-Fécamp

    Micraster decipiens : close up of heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  25. elcoincoin

    micraster decipiens - 4

    From the album: Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
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