Bolivina kiiensis Asano, 1958

Hanagata, S & Nobuhara, T, 2015, Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraph, Palaeontologia Electronica (Cambridge, England) 33 (8), pp. 1-142 : 70

Bolivina kiiensis Asano

Figures 22.19, 22.20

1958 Bolivina kiiensis Asano , pp. 19, 20, pl. 4, figs. 7, 8.

1989 Bolivina kiiensis Asano — Ōki, pl. 9, fig. 4; Inoue, pl. 32, fig. 11.

Remarks. Some specimens show that the aperture is slightly separately bordered from the attaching point with the penultimate chamber by a marginal ridge, so the generic assignment of this species might have to be changed on the basis of additional observations of well-preserved specimens.

Occurrence. Common in the Onogoshi Formation, rare in the Minebari Formation.

Figures

FIGURE 22. Family Bolivinidae. All scale bars = 0.1mm. 1, 2. Bolivina antiqua d'Orbigny, 1: MPC-26140, 2: MPC- 26141, both from sample 18 (Oura Formation,?PL1). 3—6. Bolivina cacozela Vella, 3: MPC-26142 from sample 2-2 (Minebari F., PL5); 4: MPC-26143 from sample 5 (Minebari F., PL5); 5: MPC-26144 from sample 10 (Onogoshi F., PL2); 6: MPC-26145 from sample 16 (Yonahama F., PL3). Specimens of 3 and 4 have larger test size than those of 5 and 6. 7, 8. Bolivina glutinata Egger, 7: MPC-26148 from sample 15 (Yonahama F., PL3); 8: MPC-26149 from sample 16 (Yonahama F., PL3). 9, 10. Bolivina retia Oki, 9: MPC-26154, 10: MPC-26545, both from sample 4 (Minebari F., PL5); 9.4, moisturized specimen showing internal septa. 11, 12. Bolivina robusta Brady, 11: MPC-26155 from sample 5 (Minebari F., PL5); 12: MPC-26156 from sample 10 (Onogoshi F., PL2). 13, 14. Bolivina striatula Cushman, 13: MPC-26157 from sample 14-2 (Yonahama F., PL4); 14: MPC-26158 from sample MK01 (Yonahama F., PL2). 15, 16. Bolivina variabilis (Williamson), 15: MPC-26161 from sample 16 (Yonahama F., PL3); 16: MPC-26162 from sample MK01 (Yonahama F., PL2). 17, 18. Bolivina cochei Cushman and Adams, 17: MPC-26146, 18: MPC-26147, both from sample MK01 (Yonahama F., PL2). 19, 20. Bolivina kiiensis Asano, 19: MPC-26150 from sample 3 (Onogoshi F., PL1); 20: MPC-26151 from sample 3-2-low-silt (Onogoshi F., PL1). 21, 22. Bolivina pacifica Cushman and McCulloch, 21: MPC-26152 from sample 1-2 (Minebari F., PL5); 22: MPC-26153 from sample MK01 (Yonahama F., PL2). 23. Bolivina cf. subspinescens Cushman, MPC-26159 from sample MK01 (Yonahama F., PL2). 24. Bolivina cf. yabei Takayanagi, MPC-26163 from sample MK01 (Yonahama F., PL2). 25, 26. Bolivina sp.A, 25: MPC-26164 from sample 11 (Onogoshi F.,?PL1); 26: MPC-26165 from sample 16 (Yonahama F., PL3). 27. Bolivina translucens Phleger and Parker, MPC-26160 from sample 5-2 (Minebari F., PL5).