Ammonia parkinsoniana (d'Orbigny)

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 : 119

Ammonia parkinsoniana (d'Orbigny)

Figures 35.7, 35.8

1839 Rosalina parkinsoniana d’Orbigny (a), p. 99, pl. 4, figs. 25—27.

1959 “ Rotalia” parkinsoniana (d’Orbigny) — Graham and Militante, p. 101, pl. 15, fig. 11.

1994 Ammonia parkinsoniana (d’Orbigny) — Loeblich and Tappan, p. 165, pl. 368, figs. 7—16.

Remarks. We tentatively assign this small low-trochospiral Ammonia to the present species mainly based on comparison with figures of Loeblich and Tappan (1994). Ammonia is one of the most taxonomically complex groups, and we must await detailed taxonomic studies such as the one performed by Hayward et al. (2004) using a molecular approach.

Occurrence. Common in the upper part of Yonahama Formation and the 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).