Skip to Main Content
Book Chapter

Pterosaur material from the uppermost Jurassic of the uppermost Morrison Formation, Breakfast Bench Facies, Como Bluff, Wyoming, including a pterosaur with pneumatized femora

By
M. A. McLain
M. A. McLain
1
The Master’s University, 21726 Placerita Canyon Road, Santa Clarita, California 91321, USA
Search for other works by this author on:
R. T. Bakker
R. T. Bakker
2
Houston Museum of Natural Science, 5555 Hermann Park Drive, Houston, Texas 77030, USA
Search for other works by this author on:
Published:
January 01, 2018

Abstract:

Pterosaur fossils are rare in the Morrison Formation, and most are poorly preserved. The Breakfast Bench Facies (BBF) at Como Bluff produces incomplete but uncrushed limbs. One proximal and two distal femora match a complete femur (BYU 17214) referred to Mesadactylus. Unexpectedly, both of the BBF distal femora possess a large intercondylar pneumatopore. BYU 17214 also possesses an intercondylar pneumatopore, but it is smaller than in the BBF femora. Distal femoral pnuematicity is previously recognized only in Cretaceous azhdarchoids and pteranodontids. A peculiar BBF jaw fragment shows strongly labiolingually compressed, incurved crowns with their upper half bent backwards; associated are anterior fangs. We suspect this specimen is a previously undiagnosed pterosaur. Additional BBF material documents a diverse pterosaur fauna including a humerus with a greatly expanded ectepicondyle possibly from a non-pterodactyloid monofenestratan.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

New Perspectives on Pterosaur Palaeobiology

D.W. E. Hone
D.W. E. Hone
Queen Mary University of London, UK
Search for other works by this author on:
M. P. Witton
M. P. Witton
University of Portsmouth, UK
Search for other works by this author on:
D. M. Martill
D. M. Martill
University of Portsmouth, UK
Search for other works by this author on:
The Geological Society of London
Volume
455
ISBN electronic:
9781786203366
Publication date:
January 01, 2018

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal