What fossils?

[madagascar]

What kind of fossil is this？

From the Mesozoic era in Morocco.

Thank you for your help！

 

[kgbudge]

Belemnite, maybe?

[FranzBernhard]

Lower valve of radiolitid rudist? The smooth thing could be the filling of the former void (steinkern, internal mold). The outer thing could be remnants of the shell. Am I seeing mesh or cellular structure there? This would be typical of radiolitid rudists.

Here is an example, the left one is a transverse section, the right one a longitudinal section through fragments of the lower valve of radiolitid rudists:

Franz Bernhard

Edited January 5, 2022 by FranzBernhard

[caterpillar]

I vote for Rudist

[madagascar]

8 hours ago, FranzBernhard said:

radiolitid rudist 的下阀？光滑的东西可能是填充以前的空隙（steinkern，内部模具）。外面的东西可能是外壳的残余物。我在那里看到网状或蜂窝状结构吗？这将是典型的radiolid rudists。

这是一个例子，左边是横切面，右边是纵切面，穿过radiolid rudists 下瓣膜的碎片：

 

弗朗茨·伯恩哈德

I added to my knowledge of fossils.

Thank you for your detailed answer！

[abyssunder]

I agree with Franz, it could be an internal mold of a rudist. It would be very important to know the geological age of the sediments holding your specimen and the location of the find for a possible narrowing down to the genus/species. The rudists of Morocco are not well described yet, hope they will be in the future.