Gyroidinoides altiformis (Stewart and Stewart)

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 : 115

Gyroidinoides altiformis (Stewart and Stewart)

Figures 33.10, 33.11

1930 Gyroidina soldanii d’Orbigny var. altiformis Stewart and Stewart , p. 67, pl. 9, fig. 2.

1959 Gyroidinoides altiformis (R.E. and K.C. Stewart) — Blow, pp. 160, 161, pl. 7, fig. 27.

1964 Gyroidina altiformis R.E. and K.C. Stewart — LeRoy, p. F37, pl. 7, figs. 7—9.

1966 Gyroidina acuta Boomgaart — Belford, pp. 165, 167, pl. 28, figs. 1—9, text-figs. 21-6, 21-7.

1968 Gyroidina acuta Boomgaart — Huang, p. 57, pl. 13, fig. 1 (non Gyroidina neosoldanii Brotzen var. acuta Boomgaart, 1949 ? MS). 1989 Gyroidina altiformis R.E. and K.C. Stewart — Hermelin, p. 81, pl. 15, figs. 13—15; Inoue, pl. 22, fig. 1.

1994 Gyroidina altiformis R.E. and K.C. Stewart — Akimoto, p. 284, pl. 5, fig. 1.

Remarks. Barbieri (1991) described two subspecies: Gyroidinoides altiformis altiformis (Stewart and Stewart) and Gyroidinoides altiformis acutus (Boomgaart) . Our material matches feature of the subspecies altiformis .

Occurrence. Common in the Oura and Onogoshi formations, rare in the Minebari Formation.

Figures

FIGURE 33. Family Heterolepidae and Gavelinellidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Anomalinoides glabratus (Cushman), 1: MPC-26127 from sample 3 (Onogoshi Formation, PL1); 2: MPC-26128 from sample 3-2-up-sand (Onogoshi F., PL1). 3, 4. Anomalinoides globulosus (Chapman and Parr), 3: MPC-26129, 4: MPC-26130, both from sample 10 (Onogoshi F., PL2). 5—7. Heterolepa dutemplei (d'Orbigny), 5: MPC-26317 and 6: MPC-26318, from sample MK01 (Yonahama F., PL2); 7: MPC-26319 from sample 18 (Oura F.,?PL1); 5: plano-convex, acute-periphery morphotype; 6: biconvex, round-periphery morphotype; 7: umbilico-convex, acute periphery morphotype. 8, 9. Heterolepa praecincta (Karrer), 8: MPC-26320 from sample 2-2 (Minebari F., PL5); 9: MPC-26321 from sample 6-2 (Yonahama F., PL2). 10, 11. Gyroidinoides altiformis (Stewart and Stewart), 10: MPC-26300 from sample 3 (Onogoshi F., PL1); 11: MPC-26301 from sample 18 (Oura F.,?PL1). 12, 13. Gyroidinoides broeckhiana (Karrer), 12: MPC-26302 from sample 5-2 (Minebari F., PL5); 13: MPC-26303 from sample MK01 (Yonahama F., PL2).