A spiny Brachiopod

[nala]

I found this spiny brachiopod in my boxes but thre are no more label in the bag,i think it's probably from the States the other side is not very nice but a spiny brachiopod is not very common,someone  could help ?Thanks!

[Fossildude19]

@Shamalama  @Tidgy's Dad  @Peat Burns

[Tidgy's Dad]

Pretty sure that's Acanthothiris (often misspelled Acanthothyris) , Middle Jurassic, found in Europe, Central Asia and Morocco! 

I have one from England and one from Morocco. 

The productids contained hundreds of spiny genera, but otherwise spines are quite unusual.

This one's a rhynchonellid, though, interestingly, the modern genus Acanthobasiliola is also spinose.

[nala]

Thanks Tidgy's Dad but my acanthothyris from Normandy looks really different

[Tidgy's Dad]

1 hour ago, nala said:

Thanks Tidgy's Dad but my acanthothyris from Normandy looks really different

Indeed it does. 

Firstly, brachiopods can have a great difference of form within species and secondly, there are many species within this genus. 

I shall stick with my id for now, but let's see what the others say. 

[Tidgy's Dad]

I've just checked through the Treatise and even the updates,  but can find nothing else even close.

And it's Acanthothiris,  not Acanthothyris, though it's a common mistake. 

[nala]

Thanks Tidgy's Dad ?I though the color was typical of the paleozoic brachs,perhaps you are right,that's happen when the label is lost!

 

[Tidgy's Dad]

There is a possibility that it's a Productid from the Upper Palaeozoic, but if so, it's none of the ones that I'm familiar with, it looks all wrong, but there were some pretty weird forms. 

But, as I say, let's see what others think. 

[Shamalama]

I will defer to @Tidgy's Dad on this one as I do not recognize the specimen at all. It does not remind me of any Paleozoic form. Spinatrypa is rounder, and most Productids have a flat hinge line in my experience.