Museum Basement II

[Cowboy Paleontologist]

You guys were a ton of help with the plant fossils, now it's time for round 2  

A little background for those that didn't see my last post, I have been asked to help ID and sort the fossils in a local history museum's basement.  I do not have the time or resources to commit to do the job completely by myself, so I am asking for any help I can get.

 

These are mostly bivalves and one ammonite.  As with before, I do not know the formations, but they are more likely to be from the New Mexico/Texas area than from elsewhere, although they could be from anywhere.  

And as I took these pictures last week, we still have a Sharpie as a size reference.

 

Thanks for the help!

[Cowboy Paleontologist]

[Cowboy Paleontologist]

[Cowboy Paleontologist]

[Cowboy Paleontologist]

[Cowboy Paleontologist]

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[Cowboy Paleontologist]

[Miocene_Mason]

First bivalve is an Inoceramus I believe, Cretaceous in age.

[Tidgy's Dad]

18 minutes ago, Cowboy Paleontologist said:

 

One of the Trigoniidae, possibly Pterotrigonia. sp? 

[Tidgy's Dad]

13 minutes ago, Cowboy Paleontologist said:

This one looks like Gryphaea, perhaps G. newberryi. 

[Tidgy's Dad]

26 minutes ago, Cowboy Paleontologist said:

19 minutes ago, Cowboy Paleontologist said:

Maybe a species of Pleuromya ? 

 

[Tidgy's Dad]

19 minutes ago, Cowboy Paleontologist said:

Several of these later ones look like oysters of some kind, the top one here very Ostrea sp. like.

[Seguidora-de-Isis]

I believe this is a mineral (stone) of Agate with calcite tube?

 

But it's definitely not a fossil!

 

 

 

[Cowboy Paleontologist]

44 minutes ago, Seguidora-de-Isis said:

I believe this is a mineral (stone) of Agate with calcite tube?

 

But it's definitely not a fossil!

 

 

 

I can assure you that this one is a bivalve of some sort.  It may not be a fossil, but only because there is a chance that this one is modern.

[Tidgy's Dad]

I think it's a fossil oyster with a fossil serpulid worm tube attached. 

But it may be modern. 

[abyssunder]

Considering its large dimensions and the coiling pattern, I'm leaning toward a Vermetid gastropod.

 

The above specimens are Vermicularia knorrii, family Turritellidae.

 

" The empty calcareous tubes of certain marine annelid tube worms, for example the Serpulidae, can sometimes be casually misidentified as empty vermetid shells, and vice versa. The difference is that vermetid shells are shiny inside and have three shell layers, whereas the annelid worm tubes are dull inside and have only two shell layers." - Wikipedia