Figure 14. Trilobatus sacculifer and Globigerinoidesella fistulosa protuberance ultrastructure. A in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)

Figure 14. Trilobatus sacculifer and Globigerinoidesella fistulosa protuberance ultrastructure. A, Trilobatus sacculifer (Brady, 1877); B–G, Globigerinoidesella fistulosa (Schubert, 1910). A, ODP Site 1115, Woodlark Basin, western Pacific; 10H/04/ 127–129 cm (incipient protuberance with surface texture continuous from chamber). B, C, F, G, ODP Site 1115, Woodlark Basin, western Pacific; 10H/04/127–129 cm (A, numerous spine holes present, many pores obscured/distorted; B, surface texture change towards protuberance ends with blocky thick calcite obscuring pores; F, cross-sectional view of broken protuberance, showing hollow interior; G, cross-sectional view of broken protuberance, showing hollow interior); D, E, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (D, surface texture change towards protuberance ends; blocky thick calcite obscuring pores; E, left protuberance marked by change in wall texture at protuberance end, right protuberance has all original surface texture obscured). Scale bars = 20 Lm.