Calcar

From Wikipedia, the free encyclopedia

A picture illustrating the location of the calcar on a bat.
A picture illustrating the location of the calcar on a bat.

The calcar, also known as the calcaneum [1], is the name given to a spur of cartilage arising from inner side of ankle and running along part of outer interfemoral membrane in bats [1] [2], this is to help spread the interfemoral membrane [3], which is part of the wing membrane between the tail and the hind legs.

This membrane can form a basket or pouch to help catch and hold insects captured in flight [3]. The oldest known ancestor to present day bats, Icaronycteris index, apparently did not have a calcar or spur as evidenced by fossil remains.[4].

[edit] References

  1. ^ a b The Anatomy of Bats
  2. ^ The Handbook of British Mammals (ASIN B000WPL1CO)
  3. ^ a b Encyclopedia Smithsonian: Bat Facts
  4. ^ Ontogeny, Functional Ecology, and Evolution of Bats (ISBN 978-0-52-162632-3)