Asteroceras ?

[fifbrindacier]

While visiting the caves of Cerdon in the departement of Ain, i bought that ammonite. It hadn't name but i was said that most of the ammonites sold there were from the asteroceras family.

I don't know more about it except that if it is an asteroceras it has chances to be from the Sinemurian (-200 to -191 MY).

It is about 11 cm of diameter

[TqB]

I don't know what it is but it's not Asteroceras, that always has a strong keel with grooves either side.

It reminds me of Douveilliceras (Cretaceous) but I'm usually wrong on ammonites. 

 

@Ludwigia will probably know.

[Arizona Chris]

The center appears carved to me.  It is a nice specimen however!

[caterpillar]

No, it's not a nice specimen. It's a big sh.... carved from Morocco.

I don't understand how you can buy a fossil like this

[Ludwigia]

Tarquin is correct. It's a Douvilleiceras.

[TqB]

30 minutes ago, Ludwigia said:

Tarquin is correct. It's a Douvilleiceras.

 

Thanks, Roger, there's a surprise. 

[glu]

Douvilleiceras?It looks like a totally carved Mantelliceras from Morocco

[abyssunder]

I agree! It looks like a carved Mantelliceras ammonite. The genus was present also in the Cretaceous sediments of France.

[Ludwigia]

Sorry, but I'm not quite convinced. The ribs on Mantelliceras bifurcate, whereas by Douvilleiceras they generally don't.

[caterpillar]

Hey guys! You don't see that it's a carved ammonite from Morocco? Not a Mantelliceras of course but a Cheloniceras. Only the chamber is real

[fifbrindacier]

I'm still new in the domain of fossils and i thought that i could be confident in an organization such as this one http://www.grotte-cerdon.com, partially financed by public money.

This is an area where you can find lots of species of ammonites and they promote local products, so i logically believed they sold ammonites found locally. Instead, i know now they buy them to a society with the minerals they sell.