ID Help Needed Paleocene Bone

[Kreager]

Found today and at first thought it was a Paleocene Croc Scapula. But, a FB member mentioned it could be a Paleocene mammal Talus. Thanks for looking, Any and all advice is appreciated 
Paleocene, Aquia Formation, Maryland

Edited July 16, 2018 by Kreager

[Kreager]

More

[Kreager]

Couple more

[Miocene_Mason]

Strange bone. Mammals are extremely rare in that formation so I would discount that unless better evidence is put forward. I’d guess reptilian, maybe a strange radius or humerus?

@MarcoSr @Al Dente

[Kreager]

6 hours ago, WhodamanHD said:

Strange bone. Mammals are extremely rare in that formation so I would discount that unless better evidence is put forward. I’d guess reptilian, maybe a strange radius or humerus?

@MarcoSr @Al Dente

Thank You Sir. I’ll start trying to research this one in the Reptile family. 

[MarcoSr]

8 hours ago, WhodamanHD said:

Strange bone. Mammals are extremely rare in that formation so I would discount that unless better evidence is put forward. I’d guess reptilian, maybe a strange radius or humerus?

@MarcoSr @Al Dente

 

I agree that mammal specimens are extremely rare from the Aquia Formation in Maryland.  I'm aware of only a couple ever reported.  Most likely the specimen is from a croc or turtle.  I've seen/collected only a limited number of croc and turtle bones from the Aquia so I don't have a strong id opinion but based upon croc scapula that I've seen I tend to lean away from that id unless the specimen shape has really been altered by damage and wear.  I tend to lean toward a bone in the pectoral girdle of a turtle.

 

Marco Sr.

[Kreager]

2 hours ago, MarcoSr said:

 

I agree that mammal specimens are extremely rare from the Aquia Formation in Maryland.  I'm aware of only a couple ever reported.  Most likely the specimen is from a croc or turtle.  I've seen/collected only a limited number of croc and turtle bones from the Aquia so I don't have a strong id opinion but based upon croc scapula that I've seen I tend to lean away from that id unless the specimen shape has really been altered by damage and wear.  I tend to lean toward a bone in the pectoral girdle of a turtle.

 

Marco Sr.

Thank You Marco, I’m definitely looking into the pelvic girdle of the turtle and croc. I think we are narrowing this down. Thanks so much