Elphidium planulatum (Lamarck)

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 : 123

Elphidium planulatum (Lamarck)

Figure 36.15

1798 Nautilus strigilatus varietus α Fichtel and Moll, p. 68, pl. 10, figs. e—g.

1822 Polystomella planulara Lamarck , p. 625.

1941 Elphidium aff. jenseni (Cushman) — LeRoy (Part 2), p. 78, pl. 6, figs. 32, 33.

1984 Elphidium planulatum (Lamarck) — Rögl and Hansen, pp. 49, 50, pl. 13, figs. 7, 8, pl. 14, figs. 1, 3, 4, text-fig. 18A.

Remarks. This species is characterized by a strongly compressed test with numerous chambers. Material from Miyakojima Island is broken and suggests transportation from shallower seas.

Occurrence. A single specimen from 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.