Guguita2104 Posted October 7, 2015 Share Posted October 7, 2015 I found all these belemnites in Lower Jurassic stages... 1-These are probably Toarcian,but I'm not certainly.They came near Coimbra,Portugal. My guess for first (that I prepped myself) and the second is Passalotheutis.The third I don't have any guess. 2-I found this in Peniche, Toarcian stages I think. Can someone give me specific Id's? Link to comment Share on other sites More sharing options...
Ludwigia Posted October 7, 2015 Share Posted October 7, 2015 That's really difficult without knowing the exact layers. One would also need complete specimens, views of the points and any grooves along the rostra, side views, top views, etc. It's not easy identifying belemnites without such information. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
TqB Posted October 7, 2015 Share Posted October 7, 2015 I agree with Roger, not enough to go on there I'm afraid. Tarquin Link to comment Share on other sites More sharing options...
Guguita2104 Posted October 7, 2015 Author Share Posted October 7, 2015 (edited) Thanks Roger and Tarquin! I'll post detailed pics later.About the second I finished to confirm that the layers are Toarcian, because in that area I found a stratigraph fossil for Toarcian:Pentacrinus Penichensis Edited October 7, 2015 by Guguita2104 Link to comment Share on other sites More sharing options...
Ludwigia Posted October 7, 2015 Share Posted October 7, 2015 Toarcian covers a lot of ground. Can you perhaps narrow it down some more to a particular zone? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
abyssunder Posted October 7, 2015 Share Posted October 7, 2015 I agree with the others. Just a guess for the rostrum from the second picture could be Megateuthis sp. (?) " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Ludwigia Posted October 8, 2015 Share Posted October 8, 2015 Just based on the form of the top rostrum in the first photo, I'm thinking Dactylioteuthis irregularis, which would put it into the upper Toarcian, but the jury's still out on this. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Guguita2104 Posted October 8, 2015 Author Share Posted October 8, 2015 Thanks Tarquin,Roger and Abyssunder! I'll take better photos later and then I'll post. Regards, Link to comment Share on other sites More sharing options...
Guguita2104 Posted October 8, 2015 Author Share Posted October 8, 2015 What's the main caracteristic of Megateuthis.sp Link to comment Share on other sites More sharing options...
Ludwigia Posted October 8, 2015 Share Posted October 8, 2015 To be quite honest, I don't think that that last one is a Megateuthis. To begin with, they occur in Bajocian layers, very rarely in the upper Aalenian. They tend to be very large, some rostra reaching lengths of over 1 meter. Even if this was a young one, it shows no sign of the typical short grooves at its apex. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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