pentadactyl limb

pentadactyl limb

a limb bearing five digits (fingers or toes) which is present in amphibia, reptiles, birds and mammals. The limb is thought to have been evolved largely for life on land and consists of three main parts:
  1. (a) the humerus (anterior limb) or femur (posterior limb);
  2. (b) the radius and ulna (anterior), or tibia and fibula (posterior);
  3. (c) a hand or foot made up of carpals (anterior) or tarsals (posterior), metacarpals or metatarsals and phalanges. In many forms the limb is much modified for activities such as flying, running, or swimming.
References in periodicals archive ?
Leg skeleton in birds, because pentadactyl limb, compared to wing skeleton, has been considerably under less attention and probably because of that the information about natural development of the skeleton is rare.
Another thing that he'll need to explain is the Pentadactyl limb, the ancestral terrestrial vertebrates' limb plan, which is found in all classes of tetrapods (vertebrates with four feet, legs, or leg-like appendages) from mammals to amphibians.