Everyone, show your rarest fossil specimens!

[AJ the Tyrant]

Let’s see everyone’s rarest fossil specimen(s). Time for a lot of envy!

Edited January 4, 2022 by AJ the Tyrant

[jpc]

you might not get too many responses... there was a very similar post here a few months ago.  

 

 

Edited January 4, 2022 by jpc

[PaleoOrdo]

I do not know if this is rare in general, but it is for me, as I never seen anything like it (the shape marked by a drawn circle around) not knowing what it is (size about 1 mm), from Late Ordovician in Norway:

Edited January 4, 2022 by PaleoOrdo

[ChristineR]

9 hours ago, PaleoOrdo said:

not knowing what it is

Th not knowing would drive me nuts.  The shape is fantastical!

 

this looks like a cross between an amoeba and a pixie.

 

 

[Fossildude19]

12 hours ago, PaleoOrdo said:

I do not know if this is rare in general, but it is for me, as I never seen anything like it (the shape marked by a drawn circle around) not knowing what it is (size about 1 mm), from Late Ordovician in Norway:

 

 

Things in cross section are always difficult to identify. 

[PaleoOrdo]

9 hours ago, ChristineR said:

The shape is fantastical!

 

this looks like a cross between an amoeba and a pixie.

Yes, it is a nice shape, sometimes one can find things if we get an eye for the smallest things, somehow fascinating I think. We may never know what it is.

[Nanotyrannus35]

My rarest fossil is a partial Eohiodon. I'd found this at the American Fossil Quarry in kemmerer wyoming

[Bobby Rico]

I will give it a go. This fossil is not in the best condition but on the U.K. very rare. An old museum specimen a tusk tip from a Straight Tusked elephant(say that quickly). On a stand i made.

Palaeoloxodon antiquus Tor Nuton cave south Devon. 

Edited January 5, 2022 by Bobby Rico

[FossilNerd]

On 1/3/2022 at 9:02 PM, PaleoOrdo said:

I do not know if this is rare in general, but it is for me, as I never seen anything like it (the shape marked by a drawn circle around) not knowing what it is (size about 1 mm), from Late Ordovician in Norway:

 

On 1/4/2022 at 9:14 AM, Fossildude19 said:

Things in cross section are always difficult to identify. 

 

Based upon the shape and age it reminds me of a cross section of the stromatoporoid genus Aulacera that I find in the Late Ordovician. 
 

Maybe not the species in the below link, but something similar? 

 

http://www.lakeneosho.org/More25.html

[PaleoOrdo]

17 hours ago, FossilNerd said:

Based upon the shape and age it reminds me of a cross section of the stromatoporoid genus Aulacera that I find in the Late Ordovician. 
 

Maybe not the species in the below link, but something similar? 

Thanks a lot for the suggestion. I googled about Aulacera and this genus indeed have species which look similar to this shape and size, since according to one article by B.D. Webby, "most common structures found on the outer surfaces of cylidrical labechiids (especially Aulacera) are vertical to spiral ridges, nodes and papillae". My speciemen has the form of papillae. Hence, it can be a species of Aulacera or of another labechiid. And this family, labechiidae, is found from Late Caradoc in the Oslo-field in Norway (not present in Mid-Ordovician as in China and Laurentia).

    When I took a look at the speciemen you linked, I found one picture similar in shape as another rare fossil I presented on this website before, but which was not identified. I present that one again here, and next the Aulacera one from the link for comparison.

 

    

 

Edited January 6, 2022 by PaleoOrdo