Rudist? And a Couple of Other Texas Cretaceous Unknowns

[JamieLynn]

Hello! Found a few things I cannot identify and would appreciate some help! I have done as extensive a search as I can and I am pretty sure the first specimen is a rudist. I think! Anyone care to confirm? The striations on the bottom "curve" intrigue me. The second piece is....I don't know what. Rudist again?  The next piece might be an oyster?  All were found in Hays County TX- Cretaceous, not sure of Formation. Thank you for your help! Also including in the next post my fabulous find of a tiny hippo head. Pretty sure it is an amazingly preserved head of a tiny hippo. HAAHHAH!!! Actually, and please let me know if ya'll concur, I think it is a very very worn echinoid. You can see a little bit of the shell (is that called test?) on it. 

[JamieLynn]

Here are a couple more pics of the third item plus the tiny hippo face! 

[abyssunder]

The first one looks like a rudist, close to a caprinid.

Can we see a picture taken straight to the surface of the transverse section of the wider end?

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The last picture may show the tendency of forming beekite rings on the surface of that specimen.

[Oxytropidoceras]

1 hour ago, abyssunder said:

The last picture may show the tendency of forming beekite rings on the surface of that specimen.

 

For information and pictures of beekite rings go see:

http://www.thefossilforum.com/index.php?/topic/77313-trilobites-with-beekite-rings/&tab=comments#comment-816037

http://www.thefossilforum.com/index.php?/topic/77313-trilobites-with-beekite-rings/&tab=comments#comment-815788

 

Yours,

 

Paul H.

 

[Manticocerasman]

@FranzBernhard any insight on the rudists?

 

[FranzBernhard]

Thanks, @Manticocerasman.

No, not really. @abyssunder is probably right with the first one, but lets wait for the end view.

@JamieLynn, does the second one have a cellular structure to it?

Franz Bernhard

[JamieLynn]

Thank y'all for the help. Here are transverse pics of first item. 

[JamieLynn]

And no, the second item does not have cellular structure. Here are a few more pics, you can see the strong striations on the backside. It may be geologic. I'd love to know! 

[DPS Ammonite]

21 minutes ago, JamieLynn said:

And no, the second item does not have cellular structure. Here are a few more pics, you can see the strong striations on the backside. It may be geologic. I'd love to know! 

This (if pictures of the same piece) is part of an Inoceramid oyster hinge. See pictures from a TFF post. Note parallel prisms of calcite that are normal to the shell surface.

 

 

[JamieLynn]

oh yes indeed!! That does look like it! Thank you!!!

[JamieLynn]

here are a few better pics in stronger light of the third item in question. 

[abyssunder]

Thank you for the pictures.
I'm not sure I see the necessary details, but there might be something which may look like a caprinid rudist in transverse section. A polished transverse section may be better for a more precise ID, but I know the difficulties associated with that.
I'll remain in the rudist possibility, until it will be stated otherwise.

 

 

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I'm pretty sure Don is right with the ID on the second specimen.

 

 

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For Beekite rigs, you can check this topic, also.