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Hello, I am trying to ID the parts of this mosasaur jaw. As it has the exploded look, in the posterior part of the jaw I have different hypothesis that I wanted to share with you. So this is the jaw: It comes from Oued Zem and it measures 135cm across and with the morphology of the teeth it's a thalassotitan atrox. I will be comparing this with the figure of the Thalassotitan atrox paper from Longrich et al. This is the figure of the lower jaws: So, this is the IDs that I am pretty sure about: Now let's focus on the posterior part: Here I have various Hypothesis. Hypothesis 1: Ok, from what I can see, the break line between the surangular part and the articular/angular part, I think it's natural and not exploded, so this is why I think that the surangular might end there. The part where I am not sure, is the articular if it ends before what I have marked here (you will see this in other hypothesis). Because the last part of the bone has this hole that I can't be sure what is it. Hypothesis 2: The angular and articular are completely lost and everything is surangular. I am not convinced about his because As I said before, the separation between the potential angular/articular and surangular is natural. Hypothesis 3: Same as the first one but the last chunk is a different bone. I am debating between the first and the third. Here you have some closeups about this weird bone with a hole. Thanks for your time!

I just recently came across a very helpful website: https://www.microbehunter.com/microscopy-forum It is a friendly site, and I’ve gotten quick replies to some very specific questions about a vintage microscope I recently acquired. There are a number of forums, including one for people looking to buy/sell parts. Some of the folks there have some pretty obscure old microscope parts if you ever find yourself in need of some. They’re also good for advice on how to setup and optimize your microscope.

I found these while walking around Bochum/Herne in Germany, whichr is in the Ruhrgebiet and mainly carboniferous. The left one I'm pretty sure it's sigillaria, but not so sure on the right one. Greetings!