Orbulina suturalis Brönnimann, 1951

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 : 67

Orbulina suturalis Brönnimann

Figures 21.16, 21.17

1951 Orbulina suturalis Brönnimann (b), p. 271, pl. 31, fig. 1.

1959 Orbulina suturalis Brönnimann — Blow, p. 200, pl. 13, fig. 69.

1977 Orbulina suturalis Brönnimann — Kadar, p. 66, pl. 4, fig. 25.

1978 Orbulina suturalis Brönnimann — Oda, p. 62, pl. 5, fig. 16.

1983 Orbulina suturalis Brönnimann — Kennett and Srinivasan, p. 86, pl. 20, figs. 1—3.

1985 Orbulina suturalis Brönnimann — Ujiié, pl. 6, fig. 7; Ibaraki, pp. 119, 120, pl. 5, fig. 10; Papp and Schmid, p. 20, pl. 1, figs. 1—5; Bolli and Saunders, p. 201, figs. 23.2, 24.3.

2004 Orbulina suturalis Brönnimann — Hanagata, pl. 6, fig. 7.

Occurrence. Rare in the Minebari and Yonahama formations.

Figures

FIGURE 21. Family Globigerinidae, All scale bars = 0.1mm. 1. Globigerinoidesella fistulosa (Schubert), MPC-25967 from sample 8-2 (Yonahama Formation, PL4). Poor preservation is due to serious recrystallization. 2, 3. Globoturborotalita decoraperta (Takayanagi and Saito), 2: MPC-25990 from sample 6 (Yonahama F., PL2); 3: MPC-25991 from sample MK01 (Yonahama F., PL2). 4, 5. Globoturborotalita nepenthes (Todd), 4: MPC-25992 from sample 3 (Onogoshi F., PL1); 5: MPC-25993 from sample 11 (Onogoshi F.,?PL1). Specimens of this study are young form lack elongate later chambers, but narrow-raising aperture with distinct rim characterize this species. 6, 7. Globoturborotalita rubescens (Hofker), 6: MPC-25994 from sample 6 (Yonahama F., PL2); 7: MPC-25995 from sample MK01 (Yonahama F., PL2). 8, 9. Sphaeroidinella dehiscens (Parker and Jones), 8: MPC-26025 from sample 8-2 (Yonahama F., PL4); 9: MPC-26026 from sample MK02B (Minebari F., PL5). 10, 11. Sphaeroidinellopsis seminulina (Schwager), 10: MPC-26027 from sample MK01 (Yonahama F., PL2); 11: MPC-26028 from sample 6 (Yonahama F., PL2). 12, 13. Turborotalita humilis (Brady), 12: MPC-26029 from sample 10 (Onogoshi F., PL2); 13: MPC-26030 from sample MK01 (Yonahama F., PL2). 14, 15. Turborotalita quinqueloba (Natland), 14: MPC-26031 from sample MK01 (Yonahama F., PL2); 15: MPC-26032 from sample MK02B (Minebari F., PL5). 16, 17. Orbulina suturalis Brönnimann, 16: MPC- 26015 from sample 8 (Yonahama F., PL4); 17: MPC-26016 from sample 14 (Yonahama F., PL4). 18, 19. Orbulina universa d'Orbigny, 18: MPC-26017 from sample 8-2 (Yonahama F., PL4); 19: MPC-26018 from sample MK02A (Minebari F., PL5).