Dimitar Posted April 25, 2021 Share Posted April 25, 2021 (edited) Hi guys! Please assist to identify if this is a Jellyfish strobila fossil . I was expecting it to be a plant, but the shape of the disks is so different. N.1 N.2 N.3 N.4 Edited April 25, 2021 by Dimitar Link to comment Share on other sites More sharing options...
fifbrindacier Posted April 25, 2021 Share Posted April 25, 2021 Hi, and welcome on the fossil forum. Can you, please, give us the age of that fossil and where it comes from ? Thank you. Sophie. 1 "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Dimitar Posted April 25, 2021 Author Share Posted April 25, 2021 2 minutes ago, fifbrindacier said: Hi, and welcome on the fossil forum. Can you, please, give us the age of that fossil and where it comes from ? Thank you. Sophie. Hello. It was found in Montreal . As I remember I digged something in my yard and few pieces of rocks came. It is almost between Montreal/Laval area. It should be near Ordovician time, because the color and other fossils on this specimen are matching to other shale plates from the same region. 1 Link to comment Share on other sites More sharing options...
Al Dente Posted April 25, 2021 Share Posted April 25, 2021 It might be a nautiloid. I think I see a siphuncle in the middle. 1 1 Link to comment Share on other sites More sharing options...
Dimitar Posted April 25, 2021 Author Share Posted April 25, 2021 (edited) To help dating it: there are such other fossils on the same specimen: N.5 Cone N.6 N. 7 N. 8 N. 9 - there is a trace here of thoe other part of this animal, the imprint below. All these fossils are on the same piece of rock. Edited April 25, 2021 by Dimitar 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 25, 2021 Share Posted April 25, 2021 I agree with possible orthocone cephalopod. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
fifbrindacier Posted April 25, 2021 Share Posted April 25, 2021 Agreed. 1 "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Myrmica Posted April 25, 2021 Share Posted April 25, 2021 I agree as well. Because of the delicacy of the animals, jellyfish fossils are extremely rare, and to have a fossil that captures strobilization would be amazingly amazing. 1 Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted April 25, 2021 Share Posted April 25, 2021 I think I see faint ribbing. Orthocone cephalopod would be my guess as well. 1 Link to comment Share on other sites More sharing options...
FossilDAWG Posted April 25, 2021 Share Posted April 25, 2021 It is certainly an orthoconic nautiloid. The piece that broke off is a single cameral chamber. The associated fossils are typical of the "middle" Ordovician fossils in the area. In particular, the first "associated" fossil (N5, cone) is a solitary rugosan coral, usually identified as Streptelasma corniculum. This coral would not be found in the Chazy, lower in the Ordovician strata, and it would not be found in the Upper Ordovician "Lorraine" shale formations. The other fossils are strophomenid brachiopods that have a wide range in the local Ordovician. Don 3 Link to comment Share on other sites More sharing options...
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