Neocassidulina hadai (Uchio)

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 : 90-91

Neocassidulina hadai (Uchio)

Figures 27.17-27.19

1962 Bolivina hadai Uchio , pp. 368, 369, pl. 18, figs. 3, 4.

1964 Bolivina capitata Cushman — LeRoy, p. F31, pl. 2, fig. 9 (non Bolivina capitata Cushman, 1933c ).

1964 Loxostomum okinawaens LeRoy , p. F33, pl. 2, figs. 17, 18.

1979 Brizalina subcapitata Zheng , pp. 160, 218, pl. 15, fig. 15.

1989 Bolivina hadai Uchio — Ōki, p. 107, pl. 9, fig. 1.

1992 Brizalina capitata (Cushman) — Hatta and Ujiié (b), p. 172, pl. 25 figs. 9—11.

1993 Cassidelina capitata (Cushman) — Haig, p. 170, pl. 1, figs. 4—6.

1994 Cassidelina subcapitata (Zheng) — Loeblich and Tappan, p. 118, pl. 229, figs. 8— 12.

Remarks. This species is commonly observed in the Pacific region as listed above. Bolivina capitata

Cushman, which several authors have identified with the present form, has biserial chambers and a symmetrical aperture, and belongs to Bolivina or

Brizalina according to Loeblich and Tappan (1994).

Aperture of genus Neocassidulina is not symmetrical like Bolivina . Its elongate, curved, and slit-like aperture extends up the apertural face parallel to the distal margin in side view.

Occurrence. Sporadic in the Onogoshi, Yonahama, and Minebari formations.

Figures

FIGURE 27. Family Uvigerinidae, Reussellidae, Fursenkoinidae, and Pleurostomellidae. All scale bars = 0.1mm. 1, 2. Euuvigerina vadescens (Cushman), 1: MPC-26247 from sample 10 (Onogoshi Formation, PL2); 2: MPC-26248 from sample 11 (Onogoshi F.,?PL1). 3—5. Uvigerina flintii Cushman, 3: MPC-26519 from sample 2-2 (Minebari F., PL5); 4: MPC-26520 from sample 3 (Onogoshi F., PL1); 5: MPC-26521 from sample 17 (Yonahama F., PL2). 6, 7. Uvigerina peregrina Cushman, 6: MPC-26522 from sample 6 (Yonahama F., PL2); 7: MPC-26523 from sample 6-2 (Yonahama F., PL2). 8. Uvigerina schencki Asano, MPC-26524 from sample 2 (Minebari F., PL5). 9. Uvigerina schwageri Brady, MPC-26525 from sample 5-2 (Minebari F., PL5). 10, 11. Angulogerina angulosa (Williamson), 10: MPC-26125 from sample MK01 (Yonahama F., PL2); 11: MPC-26126 from sample MK02B (Minebari F., PL5). 12, 13. Trifarina bradyi Cushman, 12: MPC-26517 from sample 3-2-up-sand (Onogoshi F., PL1); 13: MPC-26518 from sample 8 (Yonahama F., PL4). 14, 15. Reussella pulchra Cushman, 14: MPC-26461 from sample 2 (Minebari F., PL5); 15: MPC-26462 from sample MK01 (Yonahama F., PL2). 16. Fursenkoina acuta (d'Orbigny), MPC-26274 from sample 4-2 (Minebari F., PL5). 17—19. Neocassidulina hadai (Uchio), 17: MPC-26384 from sample 1 (Minebari F., PL5); 18: MPC-26385 from sample 15 (Yonahama F., PL3); 19: MPC-26386 from sample 16 (Yonahama F., PL3). 20, 21. Rutherfordoides mexicanus (Cushman), 20: MPC-26472 from sample 4 (Minebari F., PL5); 21: MPC-26473 from sample 5 (Minebari F., PL5). 22, 23. Rutherfordoides virgus (Nomura), 22: MPC-26474 from sample 1 (Minebari F., PL5); 23: MPC-26475 from sample 3-2-low-silt (Onogoshi F., PL1). 24, 25. Pleurostomella acuminata Cushman, 24: MPC-26420 from sample 7 (Yonahama F., PL4); 25: MPC-26421 from sample 17 (Yonahama F., PL2). 26—28. Pleurostomella alternans Schwager, 26: MPC-26422 from sample 7 (Yonahama F., PL4); 27: MPC-26423 and 28: MPC-26424 from sample 8-2 (Yonahama F., PL4); 27 large variation.