Figure 15 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)

Figure 15. Protuberance development from immaturus and quadrilobatus morphotypes resulting in fistulosa morphotypes (light microscope images). A, Trilobatus quadrilobatus (d'Orbigny, 1846); B, C, Trilobatus immaturus (LeRoy, 1939); D–F, Globigerinoidesella fistulosa (Schubert, 1910). A, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (umbilical view). B, C, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (umbilical view). D–F, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (umbilical view). Scale bar = 100 Lm.