Genus of the day!

Occasionally I come across an awesome genus. Not necessarily amazing in appearance, not always really cool in its mode of life, but definitely bearing an intriguing name. Today's come from the nautiloids. Mysterioceras - an Ordovician orthocerid nautiloid from Tasmania and the former USSR. We don't actually have any in our collection; I was cataloging a specimen of Campyloceras, and Mysterioceras is on the same page in the Treatise.