Bidactyly

Dactyly is the arrangement of digits (toes and fingers) on the hands, feet and in some cases the wings of a tetrapod animal. The word datyly is derived from the Greek work “δακτυλος” which means finger. Bidactyly or Didactyly is the condition where a person has two digits on each of his limbs. They are similar to that of a two-toed sloth. This name is used for humans for the abnormality where the middle digits on the limbs are missing and only the thumb and last finger or big and little toes are left. Cloven hoofed mammals have only two digits.