Textularia sp. A

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 : 18

Textularia sp. A

Figures 7.10, 7.11

Description. Relatively large, up to 1.00 mm in length, rhomboid in cross section; chambers slightly inflated and increasing rapidly in size as added; sutures depressed, dipping to margins; periphery subrounded; wall coarse to moderately agglutinated; aperture small, low arched, interiomarginal at base of last chamber.

Remarks. We distinguish this form tentatively as sp. A. It is a shallow–marine inhabitant, occurring abundantly in our samples, which is why it could have been described from elsewhere, although we could not find any previous record.

Occurrence. Abundant in the Oura Formation.

Figures

FIGURE 7. Family Textulariidae, Pseudogaudryinidae, and Valvulinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Bigenerina nodosaria d'Orbigny, 1: MPC-26035 from sample 2 (Minebari Formation, PF5); 2: MPC- 26036 from sample 11 (Onogoshi F.,?PF1). Difference of coarseness and test size between specimens of figured 1 and 2 probably reflect eco-phenotypic variation and preservation. 3, 4. Textularia agglutinans d'Orbigny, 3: MPC- 26067, 4: MPC26068, both from sample 18 (Oura F.,?PF1). 5. Textularia cf. candeiana d'Orbigny, MPC-26069, broken specimen from sample 18 (Oura F.,?PF1). 6, 7. Textularia pseudosolita Zheng, 6: MPC-26070 from sample 6 (Yonahama F., PL2); 7: MPC-26071 from sample 6-2 (Yonahama F., PL2). 8, 9. Textularia vola Lalicker and McCulloch, 8: MPC-26072 from sample 8 (Yonahama F., PL4); 9: MPC-26073 from sample 15 (Yonahama F., PL3). 10, 11. Textularia sp.A, 10: MPC-26074, 11: MPC-26075, both from sample 18 (Oura F.,?PL1). 12, 13. Siphotextularia foliosa Zheng, 12: MPC-26063 from sample 1 (Minebari F., PL5); 13: MPC-26064 from sample 15 (Yonahama F., PL3). 14, 15. Pseudoclavulina serventyi (Chapman and Parr), 14: MPC-26058 from sample 11 (Onogoshi F.,?PL1); 15: MPC-26059 from sample 18 (Oura F.,?PL1). 16, 17. Clavulina multicamerata Chapman, 16: MPC-26037 from sample 5-2 (Minebari F., PL5); 17: MPC-26038 from sample 18 (Oura F.,?PL1). 18, 19. Cribrogoesella robusta (Brady), 18: MPC-26039, 19: MPC-26040, both from sample 18 (Oura F.,?PL1).