A large flap of skin, called the patagium, extends from the animal's flanks and attaches all the way to wrist and ankle.    From Wordnik.com.  [TimesArgus.com: Barre/Montpelier Region] Reference

I think it's foolish to generalize patagium configuration across the entire group.    From Wordnik.com.  [Life's Time Capsule: Pterosaur Gallery] Reference

On balance, I would say that these features can only be explained by the presence of a patagium.    From Wordnik.com.  [That’s no mystery carnivore (part II)… it’s a giant squirrel!] Reference

As for the cruropatagium, a well-preserved Sordes don't know the specimen number--I'm looking at a photo shows the ankles attached by a patagium.    From Wordnik.com.  [Life's Time Capsule: Questions about Pterosaurs #1] Reference

The question is whether the cruropatagium attached to the TAIL thus making it split into two halves or the tail was free, but the patagium ran up to just below the tail.    From Wordnik.com.  [Life's Time Capsule: Questions about Pterosaurs #1] Reference

I should have clarified: the hair fringe was supposed by Feduccia to function as the drag-reducing part of the airfoil while the patagium and bony limb spar was thought to be the part generating lift.    From Wordnik.com.  [Literally, flying lemurs (and not dermopterans)] Reference

On the apparent absence of the patagium in the 'from behind' image (if I may), note that there is, actually, some strange baggy skin on the animal's right side (anterior to its hindlimb), while on the left we can just about make out what appears to be an unusual amount of loose skin extending, along the anterior surface of the left hindlimb, from the ankle toward the belly.    From Wordnik.com.  [That’s no mystery carnivore (part II)… it’s a giant squirrel!] Reference

Structural characteristics of the patagium of Ptychozoon kuhli (Reptilia: Gekkonidae) in relation to parachuting locomotion.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

In Pterodactyl and bat the wing is a web-wing or patagium, and a small web is to be seen on the front side of the bird's wing.    From Wordnik.com.  [The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told] Reference

But the bird's patagium is unimportant, and the bird's wing is on an evolutionary tack of its own -- a fore-limb transformed for bearing the feathers of flight.    From Wordnik.com.  [The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told] Reference

The patagium is not just a passive membrane, rather it consists of various muscles, including one along its border that tightens or slackens to assist steering.    From Wordnik.com.  [TimesArgus.com: Barre/Montpelier Region] Reference

On the approach to its landing on a tree trunk the squirrel draws in its forelegs, and the patagium folds to become a parachute for the touchdown, hind feet first.    From Wordnik.com.  [TimesArgus.com: Barre/Montpelier Region] Reference

A comparison of the hind-limbs of birds with those of bats and pterodactyls suggests strongly that the patagium flyers have arisen from arboreal or climbing animals, while the birds arose from terrestrial forms which acquired the bipedal habit, as certain reptiles have.    From Wordnik.com.  [Hormones and Heredity] Reference