Leaf of Archaeopteris halliana (Göpp.) Stur from the uppermost Devonian of Kapp Olsen on Bear Island (Bjørnøya), an island in the Arctic Ocean between the mainland of Norway and the Svalbard archipelago. Collected by Hans-Joachim Schweitzer between the years 1961-1970. The specimen is figured in Palaeontographica B 274 (Schweitzer, H.-J.,2006).