Cribroelphidium clavatum (Cushman)

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 : 121

Cribroelphidium clavatum (Cushman)

Figures 36.3, 36.4

1930 Elphidium incertum (Williamson) var. clavatum Cushman , p. 20, pl. 7, fig. 10.

1992 Elphidium clavatum Cushman — Ōki and Yamamoto, p. 200, figs. 5-6.

Remarks. Genus Cribroelphidium is distinguished from Elphidium in rounded and perforate periphery. Cribrate apertural pores are based on the experience of the first author appears also in Elphidium .

Occurrence. Sporadic in the Minebari Formation.

Figures

FIGURE 36. Family Rotaliidae and Elphidiidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Rotalinoides gaimardii (Fornasini), 1: MPC-26468 from sample 3-2-up-sand (Onogoshi Formation, PL1); 2: MPC-26469 from sample 18 (Oura F.,?PL1). 3, 4. Cribroelphidium clavatum (Cushman), 3: MPC-26210 from sample 2 (Minebari F., PL5); 4: MPC-26211 from sample MK02B (Minebari F., PL5). 5, 6. Cribroelphidium subincertum (Asano), 5: MPC-26212 from sample 1 (Minebari F., PL5); 6: MPC-26213 from sample 1-2 (Minebari F., PL5). 7, 8. Cribroelphidium sp.A, 7: MPC-26214 from sample 14 (Yonahama F., PL4); 8: MPC-26215 from sample 14-2 (Yonahama F., PL4). 9, 10. Elphidium advenum (Cushman), 9: MPC-26232 from sample 5 (Minebari F., PL5); 10: MPC-26233 from sample MK02A (Minebari F., PL5). 11, 12. Elphidium crispum (Linnaeus), 11: MPC-26234 from sample 2 (Minebari F., PL5); 12: MPC- 26235 from sample 16 (Yonahama F., PL3). 13, 14. Elphidium aff. neosimplex (McCulloch), 13: MPC-26236 from sample 11 (Onogoshi F.,?PL1); 14: MPC-26237 from sample 18 (Oura F.,?PL1). 15. Elphidium planulatum (Lamarck), MPC-26238 from sample 5-2 (Minebari F., PL5); broken specimen.