Astrononion hayamaense Kurihara, 1971

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 : 108

Astrononion hayamaense Kurihara

Figure 32.1

1971 Astrononion hayamaense Kurihara , p. 140, pl. 15, fig. 8.

Remarks. This species was originally described from the Miocene of central Honshu, Japan. It is characterized by a small size and oval cross section.

Occurrence. A single specimen from the Oura Formation.

Figures

FIGURE 32. Family Nonionidae, Chilostomellidae, Alabaminidae, Osangulariidae, and Oridorsalidae. All scale bars = 0.1mm. 1. Astrononion hayamaense Kurihara, MPC-26136 from sample 18 (Oura Formation,?PL1). 2. Astrononion stelligerum (d'Orbigny), MPC-26137 from sample MK01 (Yonahama F., PL2). 3, 4. Fijinonion fijiensis (Cushman and Edwards), 3: MPC-26259, 4: MPC-26260, both from sample 2-2 (Minebari F., PL5). 5. Laminononion tumidum (Cushman and Edwards), MPC-26345 from sample 15 (Yonahama F., PL3). 6, 7. Pacinonion umbilicatulum (Uchio), 6: MPC-26401 from sample 1 (Minebari F., PL5); 7: MPC-26402 from sample 12 (Minebari F., PL5). 8, 9. Melonis barleeanum (Williamson), 8: MPC-26370 from sample MK01 (Yonahama F., PL2); 9: MPC-26371 from sample MK02 (Minebari F., PL5). 10, 11. Melonis pacificum (Cushman), 10: MPC-26372 from sample 5-2 (Minebari F., PL5); 11: MPC- 26373 from sample MK02B (Minebari F., PL5). 12—14. Melonis pompilioides (Fichtel and Moll), 12: MPC-26374 from sample 3 (Onogoshi F., PL1); 13: MPC-26375 from sample 3-2-up-sand (Onogoshi F., PL1); 14: MPC-26376 from sample MK01 (Yonahama F., PL2). 15, 16. Pullenia bulloides (d'Orbigny), 15: MPC-26443 from sample 6 (Yonahama F., PL2); 16: MPC-26442 from sample MK01 (Yonahama F., PL2). 17, 18. Pullenia quinqueloba (Reuss), 17: MPC- 26444 from sample 1 (Minebari F., PL5); 18: MPC-26445 from sample 7 (Yonahama F., PL4). 19. Chilostomella cushmani Chapman, MPC-26194 from sample 5 (Minebari F., PL5). 20. Alabamina japonica (Asano), MPC-26107 from sample 12 (Minebari F., PL5). 21, 22. Osangularia culter (Parker and Jones), 21: MPC-26399 from sample 7 (Yonahama F., PL4); 22: MPC-26400 from sample 16 (Yonahama F., PL3). 23, 24. Oridorsalis umbonatus (Reuss), 23: MPC-26396 from sample 1-2 (Minebari F., PL5); 24: MPC-26397 from sample MK01 (Yonahama F., PL2).