Globoturborotalita nepenthes (Todd)

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 : 64

Globoturborotalita nepenthes (Todd)

Figures 21.4, 21.5

1957 Globigerina nepenthes Todd , p. 301, pl. 78, fig. 7.

1959 Globigerina nepenthes Todd — Blow, pp. 178, 179, pl. 8, figs. 44, 45.

1967 Globigerina nepenthes Todd — Parker, pp. 150, 151, pl. 19, fig. 10; Huang, p. 187, pl. 16, figs. 7, 13, 14.

1977 Globigerina nepenthes Todd — Kadar, p. 63, pl. 2, fig. 11.

1978 Globigerina nepenthes Todd — Oda, p. 51, pl. 1, figs. 12—14; Keller(a), pl. 5, figs. 12, 13.

1983 Globigerina (Zeaglobigerina) nepenthes Todd — Kennett and Srinivasan, p. 48, pl. 9, figs. 1—3.

1985 Globigerina nepenthes Todd — Ujiié, p. 109, pl. 2, figs. 3, 4; Ibaraki, p. 108, pl. 2, figs. 3, 4; Bolli and Saunders, pp. 201, 202, fig. 25.

Remarks. Specimens from Miyakojima Island illustrate the young stage; the development of a high arched aperture which characterizes this species is not observed. The vertically growing aperture that is accompanied by a distinct rim discriminates this species from congeners.

Occurrence. Common in the Oura and Onogoshi 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).