Bolivina seminuda Cushman, 1911

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 : 5

Bolivina seminuda Cushman, 1911

Figure 3.4

1911 Bolivina seminuda Cushman : p. 34, fig. 55. 1982 Bolivina seminuda Cushman ; Matoba and Yamaguchi, p. 1036, pl. 1, fig. 14a, b.

Remarks. The specimens resemble Bolivina seminuda forma C described by Matoba and Yamaguchi (1982), which is less tapered and possesses a more circular cross section than the other two forms (A and B) described from the Pliocene– Holocene in the Gulf of California.

Figures

FIGURE 3. All scale bars are 100 µm. 1. Pyrgo murrhina, 13H-3, 146–148 cm; a. lateral view; b. apertural view. 2. Pyrgo sp. A, 13H-3, 146–148 cm; a. lateral view; b. apertural view. 3. Triloculina cf. Triloculina trihedra, 9H-5, 146– 148 cm; a. lateral view; b. apertural view. 4. Bolivina seminuda, 3H-CC, lateral view. 5. Bolivina sp. A, 36H-CC; a. lateral view; b. edge view showing the asymmetrically positioned aperture. 6. Brizalina pacifica, 11H-5, 146–148 cm; a. lateral view; b. edge view. 7. Brizalina panayensis, 1H-CC; a. lateral view; b. edge view. 8. Bolivinita quadrilatera, 61X-5, 115–117 cm; a. lateral view; b. edge view showing the asymmetrically positioned aperture. 9. Takayanagia cf. Takayanagia cushmani, 1H-CC; a. ventral view showing the tooth plate; b. dorsal view; c. edge view. 10. Rutherfordoides tenuis, 10H-3, 146–148 cm; a. ventral view; b. dorsal view. 11. Globocassidulina neomargareta, 9H-5, 146– 148 cm; a. ventral view; b. apertural view showing the tooth plate; c. dorsal view; d. edge view. 12. Globocassidulina subglobosa, 13H-3, 146–148 cm; a. ventral view; b. dorsal view; c. edge view. 13. Islandiella helenae, 12H-3, 146– 148 cm; a. ventral view; b. ventral view in immersion; c. dorsal view; d. edge view. 14. Globocassidulina sp. A, 3H- CC; a. ventral side, b. dorsal side, c. edge view.