The mouthparts are reduced, with minute styliform mandibles.
2.
Also it is hard to explain the styliform element outside a flight context.
3.
However, in bats, the membrane stretches between the fingers only, no styliform wrist bone being present.
4.
Ossified styliform bones are found, however, in the wings of some modern gliding animals like flying squirrels.
5.
The Greater glider, as well as the prehistoric gliding rodent " Eomys quercyi ", has a long cartilaginous styliform element.
6.
In the " bat model ", the styliform element would have pointed straight to the rear, a membrane connecting styliform and torso.
7.
In the " bat model ", the styliform element would have pointed straight to the rear, a membrane connecting styliform and torso.
8.
This styliform, an adaptation to help support the membrane, may have been a newly evolved wrist bone, or a calcified rod of cartilage.
9.
A last configuration would be the " frog model ", the styliform bone enlarging a membranous hand plane, like that used by flying frogs.
10.
The presence of a long styliform bone adding support to the membrane, found only in other animals that glide, suggests that " Yi qi " was specialized for gliding flight.
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