"In Skyrim, it is an old tradition to rub canis root on the trees surrounding your house as a ward against werebears... /.../ ...In Black Marsh and southern Morrowind, werecrocodiles stalk the swamps. Black Marsh also shares with the Imperial Province and the wetter parts of Elsweyr the vile presence of werelions. Valenwood's werevultures are not found in any other province. The wereboar has found both the climates of High Rock and Hammerfell amenable. As I mentioned before, the werebear is the most common lycanthrope in Skyrim, and is also found in the northern parts of High Rock, the Imperial Province, and Morrowind. The werewolf can be found in every province. The seventh lycanthrope, which I have never seen but my trusted peers have assured me exists, is a wereshark that roams the oceans around Tamriel."
The original book can be found on here: http://www.uesp.net/wiki/Daggerfall:On_Lycanthropy
The lore according to this clearly states that Skyrim has Werebears. There should also be weresharks (a few specimens) and werewolves as these beasts may be found throughout Tamriel.
But ofcourse we all know it`s likely that they are going to ignore the lore. What happened to werebears in Morrowind? What happened to lycanthropes on the whole in Oblivion? There should have been werewolves roaming around in there.