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Jake alexander

Bone

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Jake alexander

My father had found this bone about 2 years back, we think it is a dugong or manatee bone. It was found in Venice, Florida. Thanks to anyone who can identify.

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IMG_7642.JPG

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Jake alexander

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Fossildude19

IMG_7641.thumb.JPG.5873ab0b9ce94941283b8500d50f1eff.JPG         IMG_7642.thumb.JPG.7b18f43fb80189b85427c681b1e9b63d.JPG             IMG_7643.thumb.JPG.1fc609240a9a769931b0201049fa51b5.JPG

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FossilDudeCO

yup, would appear to be a dugong rib section.

 

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Fishconner10

Definitely dugong

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Ptychodus04

I'm not seeing any bone texture in the photos. Looks more like a chert nodule to me. Can someone educate me on why it's definitely dugong?

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Peat Burns
1 minute ago, Ptychodus04 said:

I'm not seeing any bone texture in the photos. Looks more like a chert nodule to me. Can someone educate me on why it's definitely dugong?

Dugong ribs are really dense and tend not to show cancellous bone texture.  They do usually exhibit some faint eccentric growth rings in cross section.  River worn ones are often glossy.  Florida river specimens are usually chocolate brown in color, often with clam borings.  I can't see enough from these photos to be 100% sure (cross section is blurry), but it has some characteristics.

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Ptychodus04
1 minute ago, Peat Burns said:

Dugong ribs are really dense and tend not to show cancellous bone texture.  They do usually exhibit some faint eccentric growth rings in cross section.  River worn ones are often glossy.  Florida river specimens are usually chocolate brown in color, often with clam borings.  I can't see enough from these photos to be 100% sure (cross section is blurry), but it has some characteristics.

 

That is helpful. Thanks.

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Peat Burns
Just now, Ptychodus04 said:

 

That is helpful. Thanks.

No problem.  I was skeptical when someone showed me one for the first time.  I thought it was an iron-rich concretion or something:).  I ended up cutting it and sanding the end and saw the growth rings and compared to photos of ones taken from skeletons.  Very interesting / unusual...

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