Textularia

Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, Zootaxa 4215 (1), pp. 1-123 : 21

Textularia sp 1. ( Fig. 5 :7, 8)

Remarks. This taxon was referred to Textularia due to its free agglutinated biserial test with well-sorted mediumsized grains, depressed sutures and slightly inflated chambers with rounded but slightly squared-off chambers. The chambers of this species deeply interlock, giving them a stacked appearance ( Fig. 5 :7). The aperture is a subcircular hole located at the base of the final chamber but sits off axis due to the chamber covering the inner-most half of the chamber preceding it ( Fig. 5 :8). These features closely resemble those tests assigned by Parker (2009: fig. 53) to Textularia kerimbaensis Said 1949 from Ningaloo Reef except that the aperture is not off axis and consists of a small slit as opposed to a sub-circular hole. Capricorn Group specimens also possess taller chambers.

Distribution within study area. Textularia sp. 1 was only collected from site 3 along Heron Transect 2. It is as abundant as T. candeiana and is less common than T. agglutinans , T. lateralis and Textularia jparkeri n. sp.

Figures

FIGURE 5. (Unless otherwise specified all scale bars = 100 µm). 1 – 2. Textularia jparkeri n. sp. 1. QM # G 466056 from CHANNEL with uppermost chambers broken to reveal canaliculate wall and lack of internal septula. 2. QM # G 466058 from CHANNEL broken along longitudinal axis to view internal chamber arrangement. 3 – 6. Textularia lateralis Lalicker, 1935. 3 – 4. QM # G 465958 from OTI 43 lateral (3) and oral (4) views. 5 – 6. QM # G 465892 from ST / HW 8 lateral (5) and oral (6) views. 7 – 8. Textularia sp. 1, QM # G 465803 from T 2 – 3. 7. Lateral view, scale bar = 200 µm. 8. Oral view, scale bar = 200 µm. 9 – 11. Olgia pacifica (Cushman, 1924). 8. QM # G 466132 from OTI 20, lateral view, scale bar = 200 µm. 10 – 11. QM # G 465780 from ST / HW 2 lateral (10) and oral (11) views. 12. Cornuspira planorbis Schultze, 1854, QM # G 465976 from OTI 51. Lateral view, scale bar = 50 µm. 13 – 14. Nodobaculariella cf. N. japonica Cushman & Hanzawa, 1937, QM # G 466078 from OTI 52. 13. Lateral view. 14. Oral view. 15 – 16. Wiesnerella auriculata (Egger, 1893), QM # G 465990 from T 2 – 11. 15. Oral view. 16. Lateral view. Scale bars = 50 µm. 17 – 20. Nubeculina advena Cushman, 1924 from CHANNEL. 17 – 18. QM # G 465867 lateral (17) and close-up oral (18) views. Scale bar for 17 = 500 µm. 19 – 20. QM # G 465866, lateral (19) and close-up of oral (20) views. Scale bar for 19 = 500 µm.