Oridorsalis umbonatus ( Reuss, 1851 )

Setoyama, Eiichi & Kaminski, Michael A., 2015, Neogene benthic foraminifera from the southern Bering Sea (IODP Expedition 323), Palaeontologia Electronica (International ed. in English) 76 (4), pp. 1-30 : 18

Oridorsalis umbonatus ( Reuss, 1851)

Figure 7.2a–c

1851 Rotalina umbonata Reuss : p. 75, pl. 5, fig. 35.

1884 Truncatulina tenera Brady : p. 99, pl. 95, fig. 11.

1982 Oridorsalis umbonatus (Reuss) ; Matoba and Yamaguchi, p. 1045, pl. 4, fig. 11.

1994 Oridorsalis umbonata (Reuss) ; Jones, p. 99, pl. 95, fig. 11.

2001 Oridorsalis umbonatus (Reuss) ; Szarek, p. 144, pl. 24, figs. 1, 2.

2013 Oridorsalis umbonatus (Reuss) ; Holbourn, Henderson, and MacLeod, p. 384.

Remarks. The specimens in this study possess six to seven chambers in the final whorl.

Figures

FIGURE 7. All scale bars are 100 µm. 1. Quadrimorphina laevigata, 13H-3, 146–148 cm; a. dorsal view; b. ventral view; c. edge view. 2. Oridorsalis umbonatus, 3H-CC; a. dorsal view; b. ventral view; c. edge view. 3. Gyroidina? sp. A, 36H-5, 148–150 cm; a. dorsal view; b. ventral view; c. edge view. 4. Gyroidina? sp. A, 36H-CC; a. dorsal view; b. ventral view; c. edge view. 5. Hansenisca sp. A, 9H-3, 146–148 cm; a. dorsal view; b. ventral view; c. edge view showing a basal slit aperture. 6. Hansenisca sp. A, 16H-3, 146–148 cm; a. dorsal view; b. ventral view; c. edge view showing a low arch aperture. 7. Epelistoma sp. A, 63X-3, 146–148 cm, lateral view. 8. Lenticulina sp. A, 26H-5, 147– 149 cm; a. lateral left view; b. edge view. 9. Lenticulina sp. B, 62X-5, 146–148 cm; a. lateral left view; b. edge view. 10. Hemirobulina sp. A, 9H-5, 146–148 cm; a. lateral left view; b. edge view. 11. Reussoolina apiculata, 28H-CC, lateral view. 12. Lagena cf. Lagena tagusensis, 12H-3, 146–148 cm; a. lateral view; b. apertural view. 13. Lagena striata, 10H-3, 146–148 cm; a. lateral view; b. apertural view. 14. Oolina squamosa, 10H-3, 146–148 cm; a. lateral view; b. apertural view. 15. Glandulina ovula, 36H-5, 148/150 cm, lateral view.