In the UK and Ireland, several distinct feral populations now exist. Some of these are in isolated areas, for example on the island of Lundy, but others are contiguous with populations of the native red deer. Since the two species sometimes hybridise, there is a serious conservation concern.he sika deer is a member of the genus Cervus, a group of deer also known as the true deer. Formerly, sika were grouped together in this genus with nine other species.
The flexor retinaculum is a strong, fibrous band that covers the carpal bones on the palmar side of the hand near the wrist. It attaches to the bones near the radius and ulna. On the ulnar side, the flexor retinaculum attaches to the pisiform bone and the hook of the hamate bone.
1. a structure that retains an organ or tissue in place. 2. an instrument for retracting tissues during surgery. extensor retinaculum of foot, inferior a thickened band of the crural fascia passing from each malleolus across the front of the ankle joint, there crossing the other and passing onto the dorsum of the foot.