Ursus ingressus (Rabeder et al 2004)

Cave Bear fang tooth (carnassial) 11cm long.

It's from the so-called "Drachenhoehle" in Mixnitz, Styria, Austria. Cave bear fossils from the Late Pleistocene have been found there for a long time and were generally identified as Ursus spelaeus, but it was first established through a detailed study in 2004 that all of these fossils actually belong to the smaller newly identified species U.ingressus.

I snapped this one up recently on a good deal from our favorite auction site.