Short one today
on an old subject: the apparent dewlap of the pterosaur Pterorhynchus (Fig. 1).
Now it looks like a displaced wing membrane.
We’ve seen this before with Sordes. Sorry this took so long to appreciate and understand. The proximity to the throat bends the mind that way. Those wing fibers are impressive in UV.
Czerkas SA and Ji Q 2002. A new rhamphorhynchoid with a headcrest and complex integumentary structures. In: Czerkas SJ ed. Feathered Dinosaurs and the Origin of Flight. The Dinosaur Museum:Blanding, Utah, 15-41. ISBN 1-93207-501-1.