An arth gwynn po ors gwynn (Ursus maritimus) yw an brassa arth y'n bys, yn Kanada, Russi, Alaska, Greunland ha Norgagh.

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Arth gwynn yn Ukkusiksalik National Park, Nunavut, Kanada.
Quick Facts (ors gwynn), Klassans bewoniethek ...
Arth gwynn (ors gwynn)
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Arthes gwynn ogas ha Kaktovik, Ynys Barter, Alaska.
Klassans bewoniethek
Gwlaskor:
Animalia
Fylum:
Chordata
Klass:
Mammalia
Urdh:
Carnivora
Teylu:
Ursidae
Kinda:
Ursus
Ehen:
Ursus maritimus
Hanow dewhenwek
Ursus maritimus
Phipps, 1774
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