Latin

Noun

1. spur (equestrian)
2. A stimulus.

References

• New Latin Grammar, Allen and Greenough, 1903.

The calcar, also known as the calcaneum , 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 , this is to help spread the interfemoral membrane , 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 . The oldest known ancestor to present day bats, Icaronycteris index, apparently did not have a calcar or spur as evidenced by fossil remains..

References