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Carson

ID for a strange chondrichthyan denticle?

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Carson

I believe this is a partial denticle. Does anyone know what shark or ray it would have belonged to? It was found in a Late Maastrichtian clay in Arkansas. 

IMG_2003.JPG

IMG_2004.JPG

IMG_2005.JPG

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ynot

Looks like a dentical to Me, but other than possible ray I do not think You will be able to get an ID on it.

Tony

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Fossildude19

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Al Dente

My first guess would be some type of dermal denticle, but I've never seen one like this. Second guess would be from a bony fish. They sometimes have ornamentation on their scales and bones of the skull. What does the bottom look like?

 

Myledaphus is a fresh water ray and hasn't been found in the Southern states but there are related rays that are found there.

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Plax

I'm with Al. Frag of Atractosteus scale? (just guessing here of course)

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Carson
29 minutes ago, Al Dente said:

My first guess would be some type of dermal denticle, but I've never seen one like this. Second guess would be from a bony fish. They sometimes have ornamentation on their scales and bones of the skull. What does the bottom look like?

 

Myledaphus is a fresh water ray and hasn't been found in the Southern states but there are related rays that are found there.

 

Here is the the under side. 

IMG_2006.JPG

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Plax

Check out these pubs if you don't already have them.


J. Paleont., 80(4), 2006, pp. 700–716
Copyright q 2006, The Paleontological Society
0022-3360/06/0080-700$03.00
CHONDRICHTHYANS FROM THE ARKADELPHIA FORMATION
(UPPER CRETACEOUS: UPPER MAASTRICHTIAN)
OF HOT SPRING COUNTY, ARKANSAS
MARTIN A. BECKER,1 JOHN A. CHAMBERLAIN JR.,2 AND GEORGE E. WOLF3

 

Journal of Vertebrate Paleontology 30(4):1019–1036, July 2010
©2010 by the Society of Vertebrate Paleontology
ARTICLE
OSTEICHTHYANS FROM AN ARKADELPHIA FORMATION–MIDWAY GROUP LAG DEPOSIT

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Carson

No other freshwater fish material has been found. I am collecting a similar fauna as Case and Cappetta (1997) in Texas. 

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MarcoSr

The specimen doesn't match any dermal denticle or fish scale that I'm familiar with.  However it looks more like a fish scale to me.

 

Marco Sr.

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Carson

I appreciate everyone's input. 

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