Stilostomella fistuca ( Schwager, 1866 )

Setoyama, Eiichi & Kaminski, Michael A., 2015, Neogene benthic foraminifera from the southern Bering Sea (IODP Expedition 323), Palaeontologia Electronica (International ed. in English) 76 (4), pp. 1-30 : 12

Stilostomella fistuca ( Schwager, 1866)

Figure 8.16

1884 Nodosaria subtertenuata Schwager ; Brady, p. 507, pl. 62, figs. 7, 8.

1866 Nodosaria fistuca Schwager : p. 216, pl. 5, figs. 36, 37.

1994 Stilostomella fistuca : Jones, p. 73, pl. 62, figs. 7, 8, supplementary plate 2, figs. 12, 13.

2002 Stilostomella fistuca (Schwager) : Hayward, p. 306, pl. 3, figs. 41–45.

2012 Stilostomella fistuca (Schwager) : Hayward, Kawagata, Sagaa, Grenfell, van Kerckhoven, Johnson and Thomas, p. 183, pl. 20, figs 1–14.

Remarks. This species possesses ovoidal chambers which are loosely attached and a pustulose test surface. It is very rare, and its last occurrence is observed in Sample 13H-CC in Hole U1341B.

Superfamily DISCORBACEA Ehrenberg, 1838

Family BAGGINIDAE Cushman, 1927b

Subfamily BAGGININAE Cushman, 1927b

Genus VALVULINERIA Cushman, 1926a

Valvulineria cf. Valvulineria sadonica Asano 1951

Figure 5.1a–c

1951 Valvulineria sadonica Asano ; p. 8, figs. 55–57.

1963 Valvulineria sadonica Asano : Matsunaga, pl. 45, fig. 1.

2000 Valvulinera sadonica Asano : Scott, Takayanagi, Hasegawa, and Saito, p. 37, Fig. 14.273–275.

Remarks. It differs from Valvulineria sadonica by apertural flaps covering almost entirely the umbilicus which somehow resemble imbricated portici in planktic foraminifera (see Norris, 1992). It differs from Valvulineria mexicana Parker (1954) by its smaller flaps.

Figures

FIGURE 5. All scale bars are 100 µm. 1. Valvulineria cf. Valvulineria sadonica, 4H-CC; a. dorsal view; b. ventral view; c. edge view. 2. juvenile form of Islandiella helenae?, 1H-CC; a. ventral view; b. dorsal view; c. edge view. 3. Alabaminella weddellensis, 13H-3, 146–148 cm; a. dorsal view; b. ventral view; c. edge view. 4. Cibicidoides mundulus, 18H- 3, 146–148 cm; a. ventral view; b. dorsal view; c. edge view. 5. Cibicidoides simplex, 1H-CC; a. ventral view; b. dorsal view; c. edge view. 6. Parrelloides healdi, 1H-CC; a. dorsal view; b. ventral side view; c. edge view showing the porelike aperture. 7. Parrelloides healdi, 25H-5, 146–148 cm; a. spiral view; b. umbilical view; c. edge view showing the pore-like aperture. 8. Epistominella pulchella, 4H-CC; a. spiral view; b. umbilical view; c. edge view showing the elongate arch aperture. 9. Laticarinina pauperata, 52H-CC. 10. Cibicidoides wuellerstorfi, 10H-3, 146–148 cm; a. ventral view; b. dorsal view; c. edge view. 11. Nonionella digitata, 9H-5, 146–148 cm; a. dorsal view; b. edge view; c. ventral side.

FIGURE 8. All scale bars are 100 µm. 1. Bolivina sp. A, 1H-CC, lateral view. 2. Brizalina pacifica, 3H-CC, lateral view. 3. Brizalina panayensis, 3H-CC, lateral view. 4. Takatanagia cf. Takayanagia cushmani, 1H-CC, lateral view showing the apertural plate. 5. Rutherfordoides tenuis, 16H-5, 146–148 cm, lateral view. 6. Islandiella helenae, 13H-3, 146– 148 cm, lateral view. 7. Eubuliminella exilis, 1H-CC, lateral view. 8. Eubuliminella cf. Eubuliminella exilis, 3H-CC, lateral view. 9. Fursenkoina complanata, 3H-CC, lateral view. 10. Globobulimina cf. Globobulimina spinescens, 61X-5, 115–117 cm, lateral view. 11. Uvigerina proboscidea, 59X-3, 145–147 cm, lateral view. 12. Uvigerina senticosa, 8H-5, 146–148 cm, lateral view. 13. Rutherfordoides erectus, 1H-CC, lateral view. 14. Siphonodosaria? sp. A, 36H-5, 148– 150 cm, lateral view. 15. Siphonodosaria? sp. B, 13H-5, 146–148 cm, lateral view. 16. Stilostomella fistuca, 36H-CC, lateral view. 17. Laticarinina pauperata, 61X-CC, lateral view. 18. Nonionella digitata, 3H-CC, lateral view. 19. Nonionellina labradorica, 3H-CC, lateral view. 20. Nonionellina cf. Nonionellina labradorica, 3H-CC, lateral view. 21. Elphidium batialis, 3H-CC, lateral view. 22. Lotostomoides calomorphum, lateral view. 23. Neugeborina longiscata, 16H-5, 146–148 cm, lateral view. 24. Laevidentalina californica, 26H-CC, lateral view. 25. Laevidentalina sp. A, 36H-5, 148– 150 cm, lateral view. 26. Mucronina sp. A, 61X-CC, lateral view. 27. Astacolus sp., 22H-CC, lateral view. 28. Procerolagena gracillima, 16H-5, 146–148 cm, lateral view. 29. Lagena hispidula, 13H-5, 146–148 cm, lateral view. 30. Lagena striata, 8H-3, 146–148 cm, lateral view. 31. Oolina squamosa, 9H-5, 146–148 cm, lateral view. 32. Parafissurina caledoniana, 8H-CC, lateral view.