FIGURE 1. Location of Site U1341 in the Bering Sea. The map is adopted and modified from Expedition 323 scientists (2011).

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FIGURE 2. Stratigraphic ranges of selected species in Hole 1341B. The ages are based on bioevents of diatoms (Onodera et al., 2013).

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FIGURE 3. All scale bars are 100 µm. 1. Pyrgo murrhina, 13H-3, 146-148 cm; a. lateral view; b. apertural view. 2. Pyrgo sp. A, 13H-3, 146-148 cm; a. lateral view; b. apertural view. 3. Triloculina cf. Triloculina trihedra, 9H-5, 146-148 cm; a. lateral view; b. apertural view. 4. Bolivina seminuda, 3H-CC, lateral view. 5. Bolivina sp. A, 36H-CC; a. lateral view; b. edge view showing the asymmetrically positioned aperture. 6. Brizalina pacifica, 11H-5, 146-148 cm; a. lateral view; b. edge view. 7. Brizalina panayensis, 1H-CC; a. lateral view; b. edge view. 8. Bolivinita quadrilatera, 61X-5, 115-117 cm; a. lateral view; b. edge view showing the asymmetrically positioned aperture. 9. Takayanagia cf. Takayanagia cushmani, 1H-CC; a. ventral view showing the tooth plate; b. dorsal view; c. edge view. 10. Rutherfordoides tenuis, 10H-3, 146-148 cm; a. ventral view; b. dorsal view. 11. Globocassidulina neomargareta, 9H-5, 146-148 cm; a. ventral view; b. apertural view showing the tooth plate; c. dorsal view; d. edge view. 12. Globocassidulina subglobosa, 13H-3, 146-148 cm; a. ventral view; b. dorsal view; c. edge view. 13. Islandiella helenae, 12H-3, 146-148 cm; a. ventral view; b. ventral view in immersion; c. dorsal view; d. edge view. 14. Globocassidulina sp. A, 3H-CC; a. ventral side, b. dorsal side, c. edge view.

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FIGURE 4. All scale bars are 100 µm. 1. Takayanagia delicata, 1H-CC; a. ventral view; b. dorsal view; c. edge view. 2. Eubuliminella exilis, 1H-CC, lateral view. 3. Eubuliminella cf. Eubuliminella exilis, 1H-CC, lateral view. 4. Fursenkoina complanata, 1H-CC, a. lateral view; b. edge view. 5. Bulimina rostratiformis, 8H-3, 146-148 cm; a. lateral view; b. apertural view. 6. Bulimina spicata, 62X-5, 146-148 cm, lateral view. 7. Globobulimina affinis, 8H-CC, lateral view. 8. Globobulimina auriculata, 25H-CC, lateral view. 9. Globobulimina barbata, 8H-3, 146-148 cm; a. lateral view; b. apertural view. 10. Globobulimina barbata, 52H-CC, lateral view. 11. Globobulimina cf. Globobulimina pacifica, 8H-CC, lateral view. 12. Globobulimina cf. Globobulimina spinenscens, 61X-5, 115-117 cm; a. lateral view; b. apertural view. 13. Globobulimina ovata, 18H-3, 146-148 cm; a. lateral view; b. apertural view. 14. Globobulimina ovata, 36H-5, 148-150 cm, lateral view. 15. Uvigerina peregrina, 1H-CC; a. lateral view; b. apertural view. 16. Uvigerina peregrina, 3H-CC; a. lateral view; b. apertural view. 17. Uvigerina proboscidea, 12H-3, 146-148 cm; a. lateral view; b. apertural view. 18. Uvigerina proboscidea, 14H-CC, lateral view. 19. Uvigerina senticosa, 7H-CC, lateral view. 20. Uvigerina senticosa, 14H-CC; a. lateral view; b. apertural view. 21. Uvigerina interruptacostata, 3H-CC; a. lateral view; b. apertural view. 22. Uvigerina interruptacostata, 8H-3, 146-148 cm, lateral view. 23. Rutherfordoides erectus, 1H-CC; a. lateral view view; b. edge view. 24. Siphonodosaria sp. A, 36H-5, 148-150 cm, lateral view.

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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 pore-like 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.

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FIGURE 6. All scale bars are 100 µm. 1. Nonionellina labradorica, 3H-CC; a. lateral left view; b. edge view. 2. Nonionellina cf. Nonionellina labradorica, 15H-5, 146-148 cm; a. lateral left view; b. edge view. 3. Astrononion stellatum, 10H-CC; a. lateral fight view; b. lateral left view; c. edge view. 4. Melonis affinis, 1H-CC; a. lateral left view; b. edge view. 5. Melonis affinis, 9H-5, 146-148 cm. 6. Melonis pompilioides, 1H-CC; a. lateral left view; b. edge view. 7. Pullenia bulloides, 11H-3, 146-148 cm; a. lateral left view; b. apertural view. 8. Pullenia bulloides, 12H-3, 146-148 cm; a. lateral left view; b. apertural view. 9. Pullenia cf. Pullenia catalinaensis, 36H-CC; a. lateral left view; b. edge view. 10. Pullenia cf. Pullenia catalinaensis, 9H-5, 146-148 cm; a. lateral left view; b. edge view. 11. Pullenia elegans, 13H-3, 146-148 cm; a. lateral right view; b. edge view. 12. Pullenia elegans, 13H-3, 146-148 cm; a. lateral left view; b. edge view. 13. Pullenia salisburyi, 26H-5, 147-149 cm; a. lateral left view; b. edge view. 14. Chilostomella ovoidea, 2H-CC, a. ventral view; b. dorsal view. 15. Chilostomella cf. Chilostomella fimbriata, 10H-3, 146-148 cm; a. lateral right view; b. edge view.

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FIGURE 7. All scale bars are 100 µm. 1. Quadrimorphina laevigata, 13H-3, 146-148 cm; a. dorsal view; b. ventral view; c. edge view. 2. Oridorsalis umbonatus, 3H-CC; a. dorsal view; b. ventral view; c. edge view. 3. Gyroidina ? sp. A, 36H-5, 148-150 cm; a. dorsal view; b. ventral view; c. edge view. 4. Gyroidina ? sp. A, 36H-CC; a. dorsal view; b. ventral view; c. edge view. 5. Hansenisca sp. A, 9H-3, 146-148 cm; a. dorsal view; b. ventral view; c. edge view showing a basal slit aperture. 6. Hansenisca sp. A, 16H-3, 146-148 cm; a. dorsal view; b. ventral view; c. edge view showing a low arch aperture. 7. Epelistoma sp. A, 63X-3, 146-148 cm, lateral view. 8. Lenticulina sp. A, 26H-5, 147-149 cm; a. lateral left view; b. edge view. 9. Lenticulina sp. B, 62X-5, 146-148 cm; a. lateral left view; b. edge view. 10. Hemirobulina sp. A, 9H-5, 146-148 cm; a. lateral left view; b. edge view. 11. Reussoolina apiculata, 28H-CC, lateral view. 12. Lagena cf. Lagena tagusensis, 12H-3, 146-148 cm; a. lateral view; b. apertural view. 13. Lagena striata, 10H-3, 146-148 cm; a. lateral view; b. apertural view. 14. Oolina squamosa, 10H-3, 146-148 cm; a. lateral view; b. apertural view. 15. Glandulina ovula, 36H-5, 148/150 cm, lateral view.

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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.

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