In [[:file:applied-paleontology_fig17-18.png|Figure 2]], species inhabiting high-oxygen environments (e.g., shelf depth) are small, prolate forms; those in low-oxygen environments (e.g., basin depths) are large, lanceolate forms. | In [[:file:applied-paleontology_fig17-18.png|Figure 2]], species inhabiting high-oxygen environments (e.g., shelf depth) are small, prolate forms; those in low-oxygen environments (e.g., basin depths) are large, lanceolate forms. |