Comsognathus

 The Comsognathus has only two specimens found! One from France, and one from Germany. It is thought to be the smallest dinosaur ever, but give that a big fat X because Comsognathus was about the size of a chicken, while Lagosuchus was the size of your HAND! That's right, hand! Comsognathus mostly feasted on insects and small lizards, smaller than Comsognathus, of course. It's teeth were the size of your fingernail.

http://es.jurassicpark.wikia.com/wiki/Compsognathus