A notable trait of this butterfly are the males'retinaculum which couple the fore-and hindwing together in flight.
22.
The palmar carpal ligament is a different structure than the flexor retinaculum of the hand, but the two are frequently confused.
23.
The retinaculum is also attached in its passage across the wrist, to the ridges on the dorsal surface of the radius.
24.
This palmar cutaneous branch travels in a separate fascial groove adjacent to the flexor carpi radialis and then superficial to the flexor retinaculum.
25.
The flexor retinaculum has a limited ability to stretch, so increased pressure will eventually cause compression on the nerve within the tunnel.
26.
The flexor digiti minimi brevis arises from the hamulus of the hamate bone and the palmar surface of the flexor retinaculum of the hand.
27.
After it travels down the ulna, the ulnar nerve enters the palm of the hand by the flexor retinaculum, via the ulnar canal.
28.
The ulnar artery and ulnar nerve, and the cutaneous branches of the median and ulnar nerves, pass on top of the flexor retinaculum.
29.
The frenulum can be seen at the top of the rear wing, which hooks onto the retinaculum so that the wings travel together during flight.
30.
The ulnar nerve and the ulnar artery run through the ulnar canal, which is deep to the palmar carpal ligament and superficial to the flexor retinaculum.
