Rutherfordoides tenuis ( Phleger and Parker, 1951 )

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 : 11

Rutherfordoides tenuis ( Phleger and Parker, 1951)

Figures 3.10a, 3.10b , 8.5

1951 Cassidulinoides tenuis Phleger and Parker : p. 27, pl. 14, figs. 14–17.

1967 Evolvocassidulina tenuis (Phleger and Parker) ; Eade, p. 433, fig. 3.3, 4.

1985 Rutherfordoides tenuis (Phleger and Parker) ; Kohl, p. 89, pl. 18, fig. 5.

Remarks. Some mature specimens are as elongated as the type specimens. The specimens do not possess a prominent tooth plate. The early portions is only arched and not coiled fully as in the genus Evolvocassidulina . Juvenile forms of this species may resemble Rutherfordoides erectus (Cushman and Renz) , but differ by its more rounded cross section, and chambers which are overlapping less and possess blunt rounded ends.

Superfamily STILOSTOMELLACEA Finlay, 1947

Family STILOSTOMELLIDAE Finlay, 1947

Genus SIPHONODOSARIA Silvestri, 1924

Siphonodosaria ? sp. A

Figures 4.24 , 8.14

Description. Test elongated, uniserial with several chambers. Chambers globular in the early part and more ovoid in the later part, inflated, increasing in size rapidly, not tightly arranged. Wall rough. Aperture on a neck with a lip.

Remarks. The apertural features are not visible in the specimens, thus it is not clear whether it belongs to the genus Siphonodosaria or Strictocostella . It is rare, and its last occurrence is observed in sample 36H-5, 148/ 150cm.

Figures

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.

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.

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.