the world > the earth > land > land mass > continent > [adjective] > specific
lemurian1871
triarctic1883
Euramerican1959
Laurasian1962
1883 A. R. Wallace in Nature 22 Mar. 482/2 Heilprin..seeks to show that the Neoarctic and Palæarctic should form one region, for which he proposes..‘Triarctic Region’, or the region of the three northern continents.