Belemnites from Herznach, Switzerland

[PMA]

Hey folks,

 

so I got a package with some various fossils I want to determine now. They were found between Herznach and Hornussen in Switzerland, so supposed to be Jurassic (Middle Jurassic).

Following I have some belemnites. From left to right:

1-2: maybe hibolites and belemnopsis?

3: no idea

4-6: are these even belemnites??!

7: no idea what this is

 

Thanks in advance!

[Scylla]

4,5,6 are not belemnites. They look like large sea urchin spines.  7 might be an infilled burrow. We call them shrimp burrows.

[The Amateur Paleontologist]

4, 5 and 6 are definitely sea urchin spines, probably from a cidarid (regular sea urchin)  

-Christian

[TqB]

1 & 2 are indeed probably Pachybelemnopsis (formerly largely called Belemnopsis which is now an invalid genus for slightly complicated reasons). In Hibolithes, the furrow is further from the apex (though it can be hard to tell as some Pachybelemnopsis do that too!).

 

3 is an indeterminate piece of belemnite - does it have a furrow at all?

[Tidgy's Dad]

Nice finds.

Can we see the ends of the unidentified item, please? 

[PMA]

4 hours ago, TqB said:

 

 

3 is an indeterminate piece of belemnite - does it have a furrow at all?

No furrow

Edited March 2, 2019 by PMA

[jpc]

No's 4-6 are indeed sea urchin spines.  These are pretty common at the site in go to near my grandparents' villages in the Jura of Switzerland.  Fun stuff.