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A Trip To The Swiss Middle Jurassic


Ludwigia

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The answer I got to the Modiolus was "no", which is what I'd been figuring on anyway, since the byssus was composed completely of organic substance. It was worth a try nevertheless. The "cigar" is probably part of a scaphopod.

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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Roger.... The one with the ears is fantastic.... Great work not breaking those off lol...

Cheers Steve... And Welcome if your a New Member... :)

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Roger.... The one with the ears is fantastic.... Great work not breaking those off lol...

Thanks Steve, but to be honest, I did break off the right one while picking it up after photographing it and had to glue it back together with a pair of tweezers, super glue and 3 minutes of motionless patience. At least it held together during prep which was also pretty dodgy.

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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You really do find the best stuff Roger!!

Thanks for the laurels :D

Here's another Normannites. I've heard of putting your foot in your mouth, but this little guy's got an ear in there!

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  • I found this Informative 1

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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I just finished prepping the last block. It's a composite with the macroconch Stephanoceras humphresianum and its microconch counterpart Normannites sp. You can see that there are 2 gaping holes in the shell round about where the phragmocone meets the living chamber, which is a pity on the one hand, but on the other hand interesting in itself. I'm wondering if these holes may have been caused by a predator of some sort and would be interested to get at least a second and third opinion on that. What do you think?

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Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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Roger.... Its certainly in the right place compared to other predated shells I have seen.... Rather a coincidence if it isn't... Incidentally potentially a gas trap during decay that may of not allowed the shell to fill with sediment and crushed later being a weak spot?.... there's much debate about this...

Cheers Steve... And Welcome if your a New Member... :)

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Roger.... Its certainly in the right place compared to other predated shells I have seen.... Rather a coincidence if it isn't... Incidentally potentially a gas trap during decay that may of not allowed the shell to fill with sediment and crushed later being a weak spot?.... there's much debate about this...

Yes, you're right; Steve. It's quite a complicated subject. Thanks for your thoughts on it. At least you also can see it as a possibility like myself. Seems sometimes that the only possibility to verify such a suspicion is when either the injuries to the shell have obviously been formed by the jaws or claws of a particular predator or when the predator itself is also to be found in the immediate viscinity. Of course, a time machine would also help...

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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One last note on the Stephanoceras above. One of our experts in Steinkern is suggesting that it may have fallen prey to one of the Coleoidea, in other words, an octopus type. The form of the injury fits in with the form of their bite. He's been riding on this theory for a while and has found a number of examples to back it up. Sounds interesting anyway, so I'll make a note of that in my databank.

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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