Lenticulina aculeata (d'Orbigny)

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 : 29

Lenticulina aculeata (d'Orbigny)

Figures 10.23, 10.24

1798 Nautilus calcar Linné varietas ϑ (theta) Fichtel and Moll, p. 79, pl. 12, figs. I, k. (non Nautilus calcar Linné, 1758, p. 709 , no. 235).

1798 Nautilus calcar Linné varietas µ(mu) Fichtel and Moll, p. 79, pl. 13, figs. h, i.

1826 Robulina aculeana d’Orbigny , p. 289.

1923 Robulus calcar (Linné) — Cushman, pp. 7, 8, pl. 2, fig. 3.

1941 Robulus calcar (Linné) — LeRoy (Part 1), p. 24, pl. 1, figs. 88—89.

1964 Robulus calcar (Linné) — LeRoy, p. F22, pl. 4, figs. 14, 15.

1984 Lenticulina aculeata (d’Orbigny) — Rögl and Hansen, p. 56, pl. 19, fig. 3, p. 58, pl. 19, fig. 4, text-fig. 22.

1988 Lenticulina calcar (Linné) — Wang, Zhang, Zhao, Min, Bian, Zheng, Cheng, and Chen, pp. 141, 142, pl. 18, fig. 1.

1989 Lenticulina calcar (Linné) — Ōki, p. 97, pl. 7, fig. 3.

1990 Robulus calcar (Linné) — Akimoto, p. 210, pl. 15, fig. 10, pl. 17, fig. 6.

1994 Lenticulina calcar (Linné) — Jones, pp. 81, 82, pl. 70, figs. 9—12; Loeblich and Tappan, p. 68, pl. 120, figs. 1—8.

Diagnosis. Moderate–sized species with five chambers in final whorl, slightly raised sutures, and spines protruding from the middle of the peripheral keel of each chamber.

Remarks. As listed above, many workers have identified this species as L. calcar . According to

Rögl and Hansen (1984), however, L. calcar has numerous chambers (up to seven or ten) in final whorl; while L. aculeata has about five, more inflated, and lobulate chambers.

Occurrence. Common in all formations studied here.

Figures

FIGURE 10. Family Nodosariidae, Stilostomellidae, and Vaginulinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Grigelis orectus Loeblich and Tappan, 1: MPC-26294, 2: MPC-26295, both from sample 3-2-low-silt (Onogoshi Formation, PL1). 3, 4. Laevidentalina advena (Cushman), 3: MPC-26334 from sample 5 (Minebari F., PL5); 4: MPC-26335 from sample MK02A-2 (Minebari F., PL5). 5. Laevidentalina antarctica (Parr), MPC-26336 from sample 8 (Yonahama F., PL4). 6, 7. Laevidentalina ariena (Patterson and Pettis), 6: MPC-26337 from sample 3-2-low-silt (Onogoshi F., PL1); 7: MPC-26338 from sample 11 (Onogoshi F.,?PL1). 8. Laevidentalina bradyensis (Dervieux), MPC- 26339 from sample 1 (Minebari F., PL5); 8.3 magnified view of aperture. 9, 10. Laevidentalina subemaciata (Parr), 9: MPC-26340 from sample 3 (Onogoshi F., PL1); 10: MPC-26341 from sample 3-2-low-silt (Onogoshi F., PL1); 10.4 magnified aperture oblique-view. 11. Laevidentalina sp.A, MPC-26342 from sample 6 (Yonahama F., PL2). 12. Mucronina hasta (Parker, Jones, and Brady), MPC-26379 from sample 8-2 (Yonahama F., PL4). 13, 14. Neugeborina longiscata (d'Orbigny), 13: MPC-26547 from sample 6-2 (Yonahama F., PL2); 14: MPC-26391 from sample MK02B (Minebari F., PL5). 15—18. Pseudonodosaria discreta (Reuss), 15: MPC-26434 from sample 2-2 (Minebari F., PL5); 16: MPC-26435 from sample MK01 (Yonahama F., PL2); 17: MPC-26436 from sample 2-2 (Minebari F., PL5); 18: MPC-26437 from sample MK02A (Minebari F., PL5); 15 and 16 megalospheric forms, 17 and 18 microspheric forms. 19, 20. Parafrondicularia helenae (Chapman), 19: MPC-26418 from sample 3-2-low-silt (Onogoshi F., PL1); 20: MPC- 26419 from sample MK01 (Yonahama F., PL2). 21, 22. Proxifrons inaequalis (Costa), 21: MPC-26428 from sample 3- 2-up-sand (Onogoshi F., PL1); 22: MPC-26429 from sample 6 (Yonahama F., PL2). 23, 24. Lenticulina aculeata (d'Orbigny), 23: MPC-26350 from sample 10 (Onogoshi F., PL1); 24: MPC-26351 from sample 18 (Oura F.,?PL1).