Everhardus Posted November 20, 2020 Share Posted November 20, 2020 Roger, here's some more pictures. I can't get them much better than this with my phone. Hope this helps.... Link to comment Share on other sites More sharing options...
Ludwigia Posted November 20, 2020 Author Share Posted November 20, 2020 This looks more like some kind of oyster-like bivalve to me, but I've never seen anything like that before at the Callovian sites. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted November 20, 2020 Share Posted November 20, 2020 55 minutes ago, Ludwigia said: This looks more like some kind of oyster-like bivalve to me, but I've never seen anything like that before at the Callovian sites. Yes, it’s a curious little thing..... Link to comment Share on other sites More sharing options...
Ludwigia Posted November 20, 2020 Author Share Posted November 20, 2020 I'm thinking maybe Actinostreon marshii ? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted November 20, 2020 Share Posted November 20, 2020 I was thinking some kind of Rhynchonella but it does resemble Actinostreon a bit more.... Link to comment Share on other sites More sharing options...
Ludwigia Posted November 20, 2020 Author Share Posted November 20, 2020 I can't get any closer with my guess. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
caterpillar Posted November 21, 2020 Share Posted November 21, 2020 On 19/11/2020 at 11:30 PM, Coco said: Thanks Roger. What is/are the differentce(s) with Collyrites ? I think the difference is with the position of the posterior ambulacra.With Pygomalus, they touch the periproct, with Collyrites, they are over it http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Coco Posted November 21, 2020 Share Posted November 21, 2020 Hi, Thanks Caterpillar. Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Ludwigia Posted November 21, 2020 Author Share Posted November 21, 2020 1 hour ago, caterpillar said: I think the difference is with the position of the posterior ambulacra.With Pygomalus, they touch the periproct, with Collyrites, they are over it That is correct. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted November 23, 2020 Share Posted November 23, 2020 A few more i prepped this weekend. These have a bit more damage but i like 'm anyway... 2 Link to comment Share on other sites More sharing options...
Everhardus Posted November 29, 2020 Share Posted November 29, 2020 This weekends preps. The first ammonite did not look too promising but turned out nice apart from the damaged outer whorl at the bottom. Next is a multipiece which i quite like ! 3 Link to comment Share on other sites More sharing options...
Ludwigia Posted November 30, 2020 Author Share Posted November 30, 2020 Nice little gems, Marcel. I just dug up a few more of these today. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted November 30, 2020 Share Posted November 30, 2020 Good for you, looking forward seeing these.... Link to comment Share on other sites More sharing options...
Ludwigia Posted November 30, 2020 Author Share Posted November 30, 2020 Ok. I'll post them here when done. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted November 30, 2020 Author Share Posted November 30, 2020 Got them done already. One great thing about these little ones is that they don't take very long to prep. Here are most of them. But this is my favorite. 2 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted November 30, 2020 Share Posted November 30, 2020 Oh yes that would be my favorite as well ! Nice stuff.... 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted November 30, 2020 Share Posted November 30, 2020 3 hours ago, Ludwigia said: Got them done already. One great thing about these little ones is that they don't take very long to prep. Here are most of them. Those are lovely! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Ludwigia Posted December 1, 2020 Author Share Posted December 1, 2020 50 minutes ago, Tidgy's Dad said: Those are lovely! Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Sjfriend Posted December 1, 2020 Share Posted December 1, 2020 Beautiful! Great selection of beautiful ammos! 1 Link to comment Share on other sites More sharing options...
Everhardus Posted March 21, 2021 Share Posted March 21, 2021 I prepped this little gem this weekend. Found in the Aubachtal. This could be Aalenian (allthough a haven't got a clue what species) as well, matrix similar as my previous prep from this location but without the shell remains but equally hard ! 4 Link to comment Share on other sites More sharing options...
Ludwigia Posted March 21, 2021 Author Share Posted March 21, 2021 @Everhardus Looks like that comes from the Lower Jurassic. Typical for Aubachtal. Asteroceras perhaps? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted March 21, 2021 Share Posted March 21, 2021 From what i’ve read Asteroceras has a keel, this one doesn’t allthough i see what you mean....the preservation reminds me a bit of Promicroceras of lyme Regis but it isn’t that either. Link to comment Share on other sites More sharing options...
Ludwigia Posted March 21, 2021 Author Share Posted March 21, 2021 1 hour ago, Everhardus said: From what i’ve read Asteroceras has a keel, this one doesn’t allthough i see what you mean....the preservation reminds me a bit of Promicroceras of lyme Regis but it isn’t that either. You're right. Androgynoceras? Arnioceras? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Everhardus Posted March 21, 2021 Share Posted March 21, 2021 Androgynoceras, not for sure ( see my avatar), the ribs are connected back and front. Arnioceras also has a keel and seems more finely ribbed. I think you got it right the first time, on the calcified part there is actually a fine keel visible, not so much on the steinkern. So for now i think Asteroceras seems as close as we get here ! Link to comment Share on other sites More sharing options...
Everhardus Posted March 21, 2021 Share Posted March 21, 2021 Brings me to the question what is actually exposed at Aubachtal, i’ve found Aalenian and Sinemurian as we are discovering. What about the Toarcian / Pliensbachian ? Link to comment Share on other sites More sharing options...
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