Stainforthia ishikiensis (Asano)

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 : 76

Stainforthia ishikiensis (Asano)

Figures 24.13, 24.14

1949 Virgulina ishikiensis Asano , p. 428, text-fig. 1.

Remarks. This species was originally described from the Miocene of Fukushima, northern Japan. Scott et al. (2000) suggested it was close to Fursenkoina fusiformis [= Bulimina pupoides d'Orbigny var. fusiformis Williamson, 1858, p. 64 , pl. 5, figs. 129, 130] as well as to Virgulina akitaensis Iwasa (1955, p. 17 , text-fig. 2); but both species are distinguished from F. fusiformis in their more slender shape.

Occurrence. Rare in the Yonahama and Minebari formations.

Figures

FIGURE 24. Family Cassidulinidae and Stainforthiidae. All scale bars = 0.1mm. 1, 2. Globocassidulina okinawaensis (LeRoy), 1: MPC-26290 from sample 14-2 (Yonahama Formation., PL4); 2: MPC-26291 from sample MK02A (Minebari F., PL5). 3, 4. Globocassidulina subglobosa (Brady), 3: MPC-26292 from sample 17 (Yonahama F., PL2); 4: MPC- 26293 from sample MK01 (Yonahama F., PL2). 5. Lernella inflata (LeRoy), MPC-26366 from sample 12 (Minebari F., PL5). 6. Paracassidulina sagamiensis (Asano and Nakamura), MPC-26403 from sample 7 (Yonahama F., PL4). 7, 8. Burseolina pacifica (Cushman), 7: MPC-26185 from sample 2 (Minebari F., PL5); 8: MPC-26186 from sample 2-2 (Minebari F., PL5). 9, 10. Ehrenbergina carinata Eade, 9: MPC-26226 from sample 14 (Yonahama F., PL4); 10: MPC- 26227 from sample 14-2 (Yonahama F., PL4). 11, 12. Ehrenbergina trigona Goës, 11: MPC-26228 from sample 2 (Minebari F., PL5); 12: MPC-26229 from sample MK02A (Minebari F., PL5). 13, 14. Stainforthia ishikiensis (Asano), 13: MPC-26508 from sample 14 (Yonahama F., PL4); 14: MPC-26509 from sample 14-2 (Yonahama F., PL4).