Tuatara: Volume 10, Issue 2, June 1962
Figs. 15a, 15b: Interpretation of the history of biogeographic elements. Immigrant taxa, living and extinct (with asterisks) classified under biogeographic elements from their geographic relationships, are placed near the geological date of their first appearance as fossils to give a picture of changing geographic influences through Mesozoic and Tertiary time
Figs. 15a, 15b: Interpretation of the history of biogeographic elements. Immigrant taxa, living and extinct (with asterisks) classified under biogeographic elements from their geographic relationships, are placed near the geological date of their first appearance as fossils to give a picture of changing geographic influences through Mesozoic and Tertiary time.