What is Clypidus?

I don't what clypidus means? Just writing a post to win a contest

clypidus -- SEO contest. Win 25.000 entrecard credits!

. Now clypidus as it seems can be a name of a mammal. clypidus can be anything but can you tell me what it can be? What is clypidus?.
Let's see that my post gets into clypidus search results.