thalarctos การใช้

The polar bearhas been formally called both Ursus maritimus and Thalarctos maritimus.
Is the polar bear Ursus maritimus or Thalarctos maritimus?
The polar bear was previously considered to be in its own genus, " Thalarctos ".
The more recent designation Thalarctos combines the Greek thalasso, or sea, and arctos, or bear of the north, according to Polar Bears Alive, a conservation group.
The Asiatic black bear and the polar bear used to be placed in their own genera, " Selenarctos " and " Thalarctos "; these are now placed at subgenus rank.