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andrasz
Szivesen

As I said it's really hard to say anything definite from the photos. The last pic you posted reveals the texture well, and it does not 'feel' right. All paleogene and younger ray dental plates I have seen retain a clear bony structure, and stand out from the surrounding matrix.

However where there is one, there is more. In my experience it takes several visits to a locality to start finding really good specimens, so if the locality yields such fossils, eventually you will find more. If it is a quarry, probably your best chance is to pick through the weathered gravel and pebbles. Ray and shark teeth tend to erode out of the matrix as they are usually harder.    
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edmund
Hello everybody!
I`m new in this forum and forgive me that I start with a question,but I`m wondering if this fossil,found in sandstone of miocene(maybe eocene) of Romania is an eagle ray mouth plate single row fragment...
If it is,could be from a myliobatis(dixoni) or other ray?
Please help me identify.
Thank you.
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edmund
Maybe closer view would help?

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schming2001
I'm not sure, the roots are usually rather flat, not undulated like yours. It reminds me of a section through a crinoid stem but I'm not confident that's what it is. Edited by schming2001 2015-03-11 21:42:05
Fossils are great.
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edmund
Thank you for your answer schming2001,but I don`t think is crinoid,because is from Miocene-Eocene epoch not older.
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Julian123

Looks a bit like a mammoth tooth
Julian

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andrasz
Hard to tell from the photo, but it does look like a ray dental plate fragment to me too. The upper surface is worn so no diagnostic features left. I have seen similar deep roots on cf. Aetobatus sp. from the early Oligocene of Fayum in Egypt.

Oh, and welcome to the forum :)
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andrasz
Here is the link to my original Fayum thread with photos:
http://www.discussfossils.com/forum_posts.asp?TID=1636&KW=&PID=15287&title=help-wiith-id-please#15287
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edmund
Koszonom Andras a jo hirt!
Thanks Andrasz for your reply!
I see your post about your find Aetobatus,is nice specimen,congrats!
I don`t know what ID to put for my...I see specimens from around the world of collections and sales,but mine don`t look like those.I`m not familiar with ray teeth,so I ask you,is a minimum or maximum number of teeth in a single row teeth of ray mouth plate,within a genre/species of ray,or a fix number?
Maybe somebody from the forum or from a museum team would determine my find.It is very important to me,because in Romania this kind of finds are very rare,I mean Ray mouth plate fragments.So please,if anybody could help with this I appreciate.
I post another pic
Thank you,all.
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