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After having another look at one of my bone fragments from the Bouldnor Formation (Isle of Wight, UK), the closest match i have been able to find is a bird acetabulum, as circled in the diagram below. But i am not an expert on avian anatomy. Can anyone else offer any insight? @Auspex 

 

Specimen is approx. 33 million years old. The Bouldnor Formation on the Isle of Wight produces a wide variety of mammals, turtles, crocodilians, birds, fish, lizards and amphibians. 

 

Measures 29 mm at its longest. The 'socket' which i think may be the acetabulum is 12.5mm in diameter. 

 

IMG_E1282.JPG.0161e1365b262e2b7e6b5b1205e2ad08.JPG

 

IMG_E1283.JPG.73f44607912e16718546c28fc52076f7.JPG

 

IMG_E1286.JPG.76fbde60682f4266acf6c033cd7a2310.JPG

 

IMG_E1284.JPG.a67757c05d6e7ccea59df880a9c85b67.JPG

 

IMG_E1285.JPG.09bef3beb87bbc98dbc8d8f7fa5cafea.JPG

 

"In Africa, one can't help becoming caught up in the spine-chilling excitement of the hunt. Perhaps, it has something to do with a memory of a time gone by, when we were the prey, and our nights were filled with darkness..."

-Eternal Enemies: Lions And Hyenas

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That’s funny. Not more than five minutes ago I posted a photo of a piece of bone that looks so much like yours (but no hole) but from Cretaceous New Jersey 

B2F514E7-4080-4BC8-A71F-E610F1C90681.jpeg

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A turtle bird ? But seriously, I have been thinking the texture seems a bit coarse for a bird myself. The shape fits the illustration given quite well though. 

A flightless bird would have a well developed pelvis, and unlike pterosaurs flighted birds needed them as a launch mechanism.

  • I found this Informative 2
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Hmmm can anyone suggest an expert on avian skeletal anatomy that would be suitable to show this specimen to?

I am not too familiar with the world of bird academia, or who the 'key players' are in the field. 

"In Africa, one can't help becoming caught up in the spine-chilling excitement of the hunt. Perhaps, it has something to do with a memory of a time gone by, when we were the prey, and our nights were filled with darkness..."

-Eternal Enemies: Lions And Hyenas

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Hi,

 

He doesn’t come around much anymore, but he’s still a bird specialist : @Auspex

 

Coco

  • I found this Informative 2

----------------------
OUTIL POUR MESURER VOS FOSSILES : ici

Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici
Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici
Mâchoires sélaciennes récentes : ici
Hétérodontiques et sélaciens : ici
Oeufs sélaciens récents : ici
Otolithes de poissons récents ! ici

Un Greg...

Badges-IPFOTH.jpg.f4a8635cda47a3cc506743a8aabce700.jpg Badges-MOTM.jpg.461001e1a9db5dc29ca1c07a041a1a86.jpg

 

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51 minutes ago, Troodon said:

No clue 

For newcomers who might find this insignificant. Sometimes bone is just bone. It doesn't give up it's secrets easily.

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Hi,

Here a fellow member listed some candidates for Bouldnor birds on a family level:

http://www.thefossilforum.com/index.php?/topic/84555-bouldnor-fm-bird-tarsometatarsus/

Given that the socket stands relatively isolated I could still imagine a mammal acetabulum.

How about a small mammal like Cainotherium?

Best Regards,

J

 

Try to learn something about everything and everything about something

Thomas Henry Huxley

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  • 3 years later...

Bumping this topic as it remains unresolved. Any additional input? 

"In Africa, one can't help becoming caught up in the spine-chilling excitement of the hunt. Perhaps, it has something to do with a memory of a time gone by, when we were the prey, and our nights were filled with darkness..."

-Eternal Enemies: Lions And Hyenas

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