Figure 9 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)

Figure 9. Morphological variation in the final sac-like chamber(s) of Trilobatus sacculifer (Brady, 1877). A–G, I, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (A, B, I, spiral view, in A note elongated sac-like chamber; C–G, umbilical view, in D note kummerform sac-like chamber, in F note large, asymmetrical aperture with surrounding imperforate area); H, J–P, ODP Site 871, Limalok Guyot, Marshall Islands, equatorial Pacific 3H/03/60–62 cm (H, J–N umbilical view, in J note lobate sac-like chamber, in K note kummerform sac-like chamber, in L–N note two sac-like chambers; O, P, spiral view; note three sac-like chambers); Q, R, GLOW-3, south-west Indian Ocean (cross sectional view of wall, showing relict spines embedded within wall and chamber layers). Scale bars: A–P = 100 Lm; Q, R = 20 Lm.