The scapulae (shoulder blades) of megabats have been described as the most primitive of any chiropteran family.
The shoulder is overall of simple construction, but has some specialized features.
The primitive insertion of the omohyoid muscle from the clavicle (collarbone) to the scapula is laterally displaced (more towards the side of the body)—a feature also seen in the Phyllostomidae.
The shoulder also has a well-developed system of muscular slips (narrow bands of muscle that augment larger muscles) that anchor the tendon of the occipitopollicalis muscle (muscle in bats that runs from base of neck to the base of the thumb) to the skin.

While microbats only have claws on the thumbs of their forelimbs, most megabats have a clawed second digit as well; only Eonycteris, Dobsonia, Notopteris, and Neopteryx lack the second claw.
The first digit is the shortest, while the third digit is the longest.
The second digit is incapable of flexion.
Megabats' thumbs are longer relative to their forelimbs than those of microbats.

Megabats' hindlimbs have the same skeletal components as humans.
Most megabat species have an additional structure called the calcar, a cartilage spur arising from the calcaneus.
Some authors alternately refer to this structure as the uropatagial spur to differentiate it from microbats' calcars, which are structured differently.
The structure exists to stabilize the uropatagium, allowing bats to adjust the camber of the membrane during flight.
Megabats lacking the calcar or spur include Notopteris, Syconycteris, and Harpyionycteris.
The entire leg is rotated at the hip compared to normal mammal orientation, meaning that the knees face posteriorly.
All five digits of the foot flex in the direction of the sagittal plane, with no digit capable of flexing in the opposite direction, as in the feet of perching birds.
The scapulae (shoulder blades) of megabats have been described as the most primitive of any chiropteran family. The shoulder is overall of simple construction, but has some specialized features. The primitive insertion of the omohyoid muscle from the clavicle (collarbone) to the scapula is laterally displaced (more towards the side of the body)—a feature also seen in the Phyllostomidae. The shoulder also has a well-developed system of muscular slips (narrow bands of muscle that augment larger muscles) that anchor the tendon of the occipitopollicalis muscle (muscle in bats that runs from base of neck to the base of the thumb) to the skin.
While microbats only have claws on the thumbs of their forelimbs, most megabats have a clawed second digit as well; only Eonycteris, Dobsonia, Notopteris, and Neopteryx lack the second claw. The first digit is the shortest, while the third digit is the longest. The second digit is incapable of flexion. Megabats' thumbs are longer relative to their forelimbs than those of microbats.
Megabats' hindlimbs have the same skeletal components as humans. Most megabat species have an additional structure called the calcar, a cartilage spur arising from the calcaneus. Some authors alternately refer to this structure as the uropatagial spur to differentiate it from microbats' calcars, which are structured differently. The structure exists to stabilize the uropatagium, allowing bats to adjust the camber of the membrane during flight. Megabats lacking the calcar or spur include Notopteris, Syconycteris, and Harpyionycteris. The entire leg is rotated at the hip compared to normal mammal orientation, meaning that the knees face posteriorly. All five digits of the foot flex in the direction of the sagittal plane, with no digit capable of flexing in the opposite direction, as in the feet of perching birds.
Megabat