Pulleniatina okinawaensis Natori, 1976

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 : 52

Pulleniatina okinawaensis Natori

Figures 18.1, 18.2

1976 Pulleniatina okinawaensis Natori , pp. 227, 228, pl. 5, figs. 5, 6.

1985 Pulleniatina okinawaensis Natori — Ujiié, p. 114, pl. 18, figs. 3, 4.

1994 Pulleniatina okinawaensis Natori — Loeblich and Tappan, p. 103, pl. 198, figs. 1— 6.

2004 Pulleniatina okinawaensis Natori — Hanagata, pl. 4, fig. 2.

Remarks. Only dextral forms have been recov-

ered. This probably is a neoteny of Pulleniatina obliquiloculata , retaining the immature character of the apertural position, centred in the umbilical region retained in the adult stage.

Occurrence. Rare in the Yonahama Formation.

Figures

FIGURE 18. Family Pulleniatinidae, Candeinidae, Catapsydracidae, and Globigerinidae. All scale bars = 0.1mm. 1, 2. Pulleniatina okinawaensis Natori, 1: MPC-26021 from sample 4-2 (Minebari Formation, PL5); 2: MPC-26022 from sample 12 (Minebari F., PL5); both right coiling (dextral) specimens. 3, 4. Pulleniatina praecursor Banner and Blow, 3: MPC-26023, 4: MPC-26024, both from sample 6 (Yonahama F., PL2). 5—7. Globigerinita glutinata (Egger), 5: MPC- 25950 from sample MK01 (Yonahama F., PL2); 6: MPC-25951 and 7: MPC-25952 from sample MK02B (Minebari F., PL5). Specimen of 7 lacks bulla-like cover on the umbilicus. 8, 9. Globigerinita uvula (Ehrenberg), 8: MPC-25953 from sample 10 (Onogoshi F., PL2); 9: MPC-25954 from sample MK01 (Yonahama F., PL2). 10. Candeina nitida d'Orbigny, MPC-25926 from sample 5-2 (Minebari F., PL5). 11, 12. Dentoglobigerina altispira (Cushman and Jarvis), 11: MPC-25932 from sample 10 (Onogoshi F., PL2); 12: MPC-25933 from sample MK01 (Yonahama F., PL2). 13, 14. Globorotaloides hexagona (Natland), 13: MPC-25988 from sample 1 (Minebari F., PL5); 14: MPC-25989 from sample 5 (Minebari F., PL5). 15—18. Alloglobigerinoides conglobatus (Brady), 15: MPC-25925 from sample 12 (Minebari F., PL5); 16: MPC-25926 from sample MK02A (Minebari F., PL5); 17: MPC-25927 from sample 5 (Minebari F., PL5); 18: MPC-25928 from sample 14 (Yonahama F., PL4). 17 and 18, variation final chamber covering umbilicus. 19, 20. Globigerina bulloides d'Orbigny, 19: MPC-25936 from sample MK01 (Yonahama F., PL2); 20: MPC-25937 from sample MK02B (Minebari F., PL5).