Duquepsammia bulbosa (Cushman)

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 : 16

Duquepsammia bulbosa (Cushman)

Figures 6.9, 6.10

1900 Spiroplecta annectens Parker and Jones — Millett (part VII), p. 8, pl. 1, fig. 7 (non Textularia annectens Parker and Jones, 1863 ).

1911 Spiroplecta bulbosa Cushman , p. 5, text-fig. 1.

1921 Spiroplecta bulbosa Cushman , p. 102, pl. 20, fig. 1.

1941 Spiroplectoides bulbosus (Cushman) — LeRoy (Part 1), p. 31, pl. 3, figs. 95, 96.

1953 Bolivinopsis hiratai Uchio , p. 153, pl. 14, fig. 5.

1964 Bolivinopsis hiratai Uchio — LeRoy, p. F29, pl. 1, fig. 10.

1977 Spirobolivina (?) antarctica McCulloch , p. 243, 244, pl. 102, fig. 17.

1992 Spiroplectammina bulbosa (Cushman) — Hatta and Ujiié (a), p. 56, pl. 1, fig. 6.

1994 Duquepsammia bulbosa (Cushman) — Loeblich and Tappan, p. 20, pl. 17, figs. 5, 6.

1998 Duquepsammia bulbosa (Cushman) — Hess, p. 60, pl. 8, fig. 4.

Diagnosis. Small for the genus, early planispiral stage involute, later biserial stage tends to become elongate with growth, wall finely agglutinated with much cement which results in slightly transparent wall, periphery acute.

Remarks. Textularia annectens Parker and Jones [= Spiroplectella earlandi Barker of Jones 1994, p. 50, pl. 45, figs. 22, 23 = Duquepsammina earlandi (Barker) by Loeblich and Tappan, 1994, p. 20, 21, pl. 17, figs. 1—4], which Millett (1900) referred to, is distinguished from D. bulbosa by its biumbilicate and evolute test in the planispiral stage. Bolivinopsis hiratai Uchio is regarded herein as a junior synonym of this species.

Occurrence. Common in the Yonahama Formation.

Figures

FIGURE 6. Family Hormosinidae, Ammosphaeroidinidae, Spiroplectamminidae, Duquepsamminidae, Verneuilinidae, and Eggerellidae. All scale bars = 0.1mm, unless otherwise indicated in 2.1, 23.1, 26.1 as 1mm-line. 1, 2. Rhabdammina sp., 1: MPC-26061, 2: MPC-26062, both from sample 7 (Yonahama Formation, PL4), broken specimens. 3. Hormosinella distans (Brady), MPC-26051, from sample 15 (Yonahama F., PL3), depressed specimen. 4. Reophax sp., MPC-26060, from sample 7 (Yonahama F., PL4). 5, 6. Ammosphaeroidina sphaeroidiniformis (Brady); 5: MPC-26033 from sample 6 (Yonahama F., PL2); 6: MPC-26034, from sample 6-2 (Yonahama F., PL2). 7, 8. Spiroplectinella wrightii (Silvestri), 7: MPC-26065 from sample 6-2 (Yonahama F., PL2); 8: MPC-26066 from sample MK02A-2 (Minebari F., PL5). 9, 10. Duquepsammia bulbosa (Cushman), 9: MPC-26041 from sample 8 (Yonahama F., PL4), 10: MPC-26042 from sample 15 (Yonahama F., PL3). 11, 12. Trochammina sp., 11: MPC-26077, laterally depressed specimen, 12: MPC26078, vertically depressed specimen, both from sample 7 (Yonahama F., PL4). 13, 14. Gaudryina arenaria Galloway and Wissler, 13: MPC-26045 from sample 6-2 (Yonahama F., PL2); 14: MPC26046 from sample 17 (Yonahama F., PL2). 15, 16. Gaudryina sp.A., 15: MPC-26047 from sample 3-2-low-silt (Onogoshi F., PL1); 16: MPC-26048 from sample 11 (Onogoshi F.,?PL1). 17, 18. Gaydryinella cf. japonica Asano, 17 MPC-26049, 18 MPC- 26050, both from sample 18 (Oura F.,?PL1). 19, 20. Eggerella bradyi (Cushman), 19: MPC-26043 from sample 14-2 (Yonahama F., PL4); 20: MPC-26044 from sample 15 (Yonahama F., PL3). 21, 22. Karreriella bradyi (Cushman), 21: MPC-26052 from sample 2 (Minebari F., PL5); 22: MPC-26053 from sample MK02A (Minebari F., PL5). 23, 24. Martinottiella communis (d'Orbigny), 23: MPC-26054 from sample 3 (Onogoshi F., PL1); 24: MPC-26055 from sample 3- 2-low-silt (Onogoshi F., PL1). 25, 26. Martinottiella victorensis (Cushman), 25: MPC-26056 from sample 6-2 (Yonahama F., PL2); 26: MPC-26057 from sample 16 (Yonahama F., PL3).