Pseudoeponides japonicus Uchio

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 : 106-107

Pseudoeponides japonicus Uchio

Figures 31.12-31.14

1950 Pseudoeponides japonica Uchio in Kawai, Uchio, Ueno, and Hozuki, p. 190, fig. 16.

1951 Pseudoeponides japonica Uchio — Uchio, pp. 38, 39, pl. 3, fig. 1.

1963 Pseudoeponides japonica Uchio — Matsunaga, pl. 45, fig. 7.

1950 Epistomaria miurensis Kuwano , pp. 315, 316, figs. 3, 10.

1951 Pseudoeponides japonicus Uchio — Uchio, pp. 38, 39, pl. 3, fig. 1; Asano (part 14), p. 19, text-figs. 138, 140.

1964 Pseudoeponides japonicus Uchio — LeRoy, p. F39, pl. 9, figs. 20—22.

1967 Pseudoeponides japonicus Uchio — Matoba, pl. 26, fig. 20.

1994 Pseudoeponides japonicus Uchio — Loeblich and Tappan, p. 156, pl. 338, figs. 1— 12.

2000 Epistomaria miurensis Kuwano — Scott, Takayanagi, Hasegawa, and Saito, p. 21, figs. 7.137 —7.139.

2001 Pseudoeponides japonicus Uchio — Kawagata, p. 101, fig. 12-4.

Remarks. This is one of the commoner species in the Pliocene of Japan. Its taxonomic status once was in confusion since Kuwano (1950) described E. miurensis in the same year as Uchio erected P. japonicus . The date of issue of Uchio’s paper is June 30th, 1950, that of Kuwano’s is September 20th, 1950. These dates appear on the back cover print of each journal. However, what is confusing is that both journals indicate the month of publication to be “ June 1950 ” on the front page. Consequently, the issue date is the single key to decide priority based on the date of publication, even though the description by Uchio (1950) is incomplete in lacking description of type horizon, decision, and repository of type specimens. Kuwano (1950) did provide a systematic description and a fine drawing of specimens. Uchio published an additional description of P. japonicus in 1951.

Occurrence. Common in all the formations of the present study.

Figures

FIGURE 31. Family Planulinidae, Cibicididae, Epistomariidae, Amphisteginidae, and Nonionidae. All scale bars = 0.1mm. 1, 2. Planulina retia Belford, 1: MPC-26416 from sample 2 (Minebari Formation, PL5); 2: MPC-26417 from sample 5-2 (Minebari F., PL5). 3, 4. Cibicides refulgens de Montfort, 3: MPC-26197 from sample 2-2 (Minebari F., PL5); 4: MPC-26198 from sample 14-2 (Yonahama F., PL4). 5. Cibicides tenuimargo (Brady), MPC-26199 from sample 4-2 (Minebari F., PL5); stripe pattern on the dorsal side implies attached material. 6, 7. Fontbotia wuellerstorfi (Schwager), 6: MPC-26272 from sample MK01 (Yonahama F., PL2); 7: MPC-26273 from sample MK02A (Minebari F.,PL5).8, 9. Lobatula lobatula (Walker and Jacob), 8: MPC-26367 from sample 5 (Minebari F., PL5); 9: MPC-26368 from sample 5-2 (Minebari F., PL5). 10, 11. Dyocibicides biserialis Cushman and Valentine, 10: MPC-26224 from sample 2-2 (Minebari F., PL5); 11: MPC-26225 from sample 3-2-up-sand (Onogoshi F., PL1). 12—14. Pseudoeponides japonicus Uchio, 12: MPC-26430 from sample 14 (Yonahama F., PL4); 13: MPC-26431 and 14: MPC-26548 from sample MK02B (Minebari F., PL5); arrows in 14 shows slit opening along dorsal sutures. 15, 16. Amphistegina lessonii d'Orbigny, 15: MPC-26123 from sample 2 (Minebari F., PL5); 16: MPC-26124 from sample 2-2 (Minebari F., PL5); all specimens of this study are juveniles. 17, 18. Nonion japonicum Asano, 17: MPC-26392 from sample 5-2 (Minebari F., PL5); 18: MPC-26393 from sample 11 (Onogoshi F.,?PL1). 19, 20. Nonionellina labradorica (Dawson), 19: MPC-26394 from sample 1-2 (Minebari F., PL5); 20: MPC-26395 from sample MK02B (Minebari F., PL5). 21, 22. Pseudononion cuevasensis Saunder and Müller-Merz, 21: MPC-26438 from sample 10 (Onogoshi F., PL2); 22: MPC-26439 from sample MK02B (Minebari F., PL5). 23, 24. Pseudononion subcostatum Fujita and Ito, 23: MPC- 26440 from sample 14-2 (Yonahama F., PL4); 24: MPC-26441 from sample MK02B (Minebari F., PL5).