Pararotalia cf. nipponica (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 : 118

Pararotalia cf. nipponica (Asano)

Figures 35.1, 35.2

Compared with:

1936 Rotalia nipponica Asano (b), p. 614, pl. 31, fig. 2.

Remarks. The present specimens are juvenile, and not suited for critical identification. The juvenile stage of Pararotalia nipponica has peripheral spines which disappear in the adult stage (e.g., Ujiié, 1966).

Occurrence. Two specimens from a single sample of Minebari Formation.

Figures

FIGURE 35. Family Rotaliidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Pararotalia cf. nipponica (Asano), 1: MPC-26407, 2: MPC-26408, both from sample MK02B (Minebari Formation, PL5). 3—6. Ammonia maruhasii (Kuwano), 3: MPC-26112 from sample 18 (Oura F.,?PL1); 4: MPC-26113 from sample MK02B (Minebari F., PL5); 5: MPC-26114 from sample 3-2-up-sand (Onogoshi F., PL1); 6: MPC-26115 from sample MK01 (Yonahama F., PL2); 5 and 6, high trochospiral variety. 7, 8. Ammonia parkinsoniana (d'Orbigny), 7: MPC-26116 from sample 14 (Yonahama F., PL4); 8: MPC-26117 from sample 14-2 (Yonahama F., PL4). 9, 10. Asterorotalia pulchella (d'Orbigny), 9: MPC-26134 from sample 10 (Onogoshi F., PL2); 10: MPC-26135 from sample 18 (Oura F.,?PL1). 11, 12. Rotalinoides compressiuscula (Brady), 11: MPC-26466 from sample 5-2 (Minebari F., PL5); 12: MPC-26467 from sample 18 (Oura F.,?PL1).