Having two or more
(fingers or toes) wholly or
partly joined together. The extent of the join may vary
from a membrane of skin to a full fusion of bone.
Syndactyly sometimes occurs naturally in some
species. For example, the bones of toes II and III of
the hind feet of kangaroos are fused up to the claw.
(Syndactyly is a characteristic feature of
diprotodonts, which also includes wallabies, koalas
Syndactyly may also be a congenital abnormality in, for
example, cats, dogs and humans.