Quinqueloculina

Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, Zootaxa 4215 (1), pp. 1-123 : 48-49

Quinqueloculina sp. 2 ( Fig. 10 :20, 21)

Description. Test robust, stout, quinqueloculine coiled with oval cross-section. Chambers inflated with deeply depressed, curved sutures. Aboral end slightly produced. Test wall has a patchy, rough texture with thick, widely spaced, irregularly developed, weak longitudinal costae. Large terminal circular aperture about half as large as test in plan view with peristomal lip. Dentition consisting of a short, T-shaped bifid tooth.

Remarks. This species resembles both Q. baccaerti and Quinqueloculina sp. 3, but can be distinguished by its stout, robust inflated test with a large circular aperture and well developed peristomal lip ( Fig. 10 :20, 21). Both Quinqueloculina sp. 2 and Q. baccaerti have a similar wall texture, weak costae, aperture shape and weakly inflated chambers. However, Quinqueloculina sp. 2 has a more diminutive test, the chambers are more inflated, the roughened wall texture is patchy in its development, the costae are more distinct but also more irregular and the aperture, peristomal lip and dentition much larger and produced (compare Fig. 8 :3, 4 with Fig. 10 :20, 21). Quinqueloculina sp. 2 has a similar wall texture, aperture shape, dentition and weak costae to Quinqueloculina sp. 3 but a more stunted, inflated test, with more deeply depressed sutures that curve, more irregular costae and the aperture, lip and dentition are much larger (compare Fig. 10 :20, 21 with Fig. 11 :1, 2).

Distribution within study area. Quinqueloculina sp. 2 was only found in relatively deeper waters of the CG and was absent from Heron and Sykes Reefs. The greatest abundance of this species was found at sites 15 and 19 in Wistari Lagoon.

Figures

FIGURE 8. (Unless otherwise specified all scale bars = 100 µm). 1 – 2. Quinqueloculina cf. Q. agglutinans d’Orbigny, 1839. QM # G 465786 from ST / HW 2, lateral view (1), scale bar = 200 µm and oral view (2), scale bar = 200 µm. 3 – 4. Quinqueloculina baccaerti n. sp. QM # G 465818 from OTI 36. 3. Lateral view. 4. Oral view. 5 – 7. Quinqueloculina bosciana d’Orbigny, 1839. QM # G 465978 from WL 21, lateral view (5), oral view (6). 7. QM # G 466135 from OTI 36, lateral view. Scale bar = 50 µm. 8 – 9. Quinqueloculina latidentella Loeblich & Tappan, 1994, QM # G 465825 from OTI 36. 8. Lateral view. 9. Peripheral view. 10 – 21. Quinqueloculina neostriatula Thalmann, 1950. 10 – 11. QM # G 466102 from WL 19, lateral (10) and oral (11) views. 12 – 13. QM # G 465984 from OTI 52, lateral (12) and oral (13) views. Scale bar for 13 = 50 µm. 14. QM # G 466071 from HL 40, oral view. 15. QM # G 466068 from HL 40, close-up oral view. Scale bar = 50 µm. 16 – 17. QM # G 465983 from WL 21, lateral (16) and oral (17) views. Scale bar for 16 = 200 µm. 18 – 19. QM # G 465833 from OTI 39, lateral (18) and oral (19) views. Scale bar for 18 = 200 µm. 20 – 21. QM # G 466096 from OTI 52, lateral (20) and oral (21) views.

FIGURE 10. (Unless otherwise specified all scale bars = 100 µm). 1 – 2. Quinqueloculina seminula (Linneaus, 1758), QM # G 466095 from OTI 53. 1. Lateral view. 2. Oral view. 3 – 5. Quinqueloculina subgranulata (Cushman, 1918), QM # G 465836 from OTI 39. 3. Lateral view. 4. Peripheral view. 5. Oral view. 6 – 7. Quinqueloculina subparkeri McCulloch, 1977, QM # G 465894 from ST / HW 10. 6. Lateral view. 7. Oral view. 8 – 10. Quinqueloculina subpolygona Parr, 1945. 8 – 9. QM # G 465985 from HIL 39, lateral view (8) and oral view (9). 10. QM # G 465986 from HIL 39, peripheral view. 11 – 15. Quinqueloculina transversestriata (Brady, 1881). 11 – 13. QM # G 465784 from ST / HW 2, lateral (11), peripheral (12) and oral (13) views. 14 – 15. QM # G 466098 from OTI 52 lateral (14) and oral (15) views. 16 – 17. Quinqueloculina cf. Q. victoriensis Collins, 1974, QM # G 465908 from T 1 – 6. 16. Lateral view. 17. Oral view. 18 – 19. Quinqueloculina sp. 1, QM # G 465823 from OTI 36. 18. Lateral view. 19. Oral view. 20 – 21. Quinqueloculina sp. 2, QM # G 466101 from WL 19. 20. Lateral view. 21. Peripheral view.

FIGURE 11. (Unless otherwise specified all scale bars = 100 µm). 1 – 2. Quinqueloculina sp. 3, QM # G 465918 from WL 1. 1. Lateral view. 2. Oral view. 3 – 5. Quinqueloculina sp. 4, QM # G 465831 from OTI 39. 3. Lateral view. 4. Oral view. 5. Peripheral view. 6 – 7. Quinqueloculina sp. 5, QM # G 465782 from ST / HW 2. 6. Lateral view, scale bar = 200 µm. 7. Oral view, scale bar = 200 µm. 8 – 9. Quinqueloculina sp. 6, QM # G 465910 from T 3 – 2. 8. Lateral view. 9. Peripheral view. 10 – 11. Quinqueloculina sp. 7, QM # G 465951 from S 8. 10. Lateral view, scale bar = 500 µm. 11. Close-up lateral view, scale bar = 50 µm. 12 – 15. Miliolinella circularis (Bornemann, 1855). 12 – 13. QM # G 465898 from ST / HW 10, lateral (12) and oral (13) views. 14 – 15. QM # G 465980 from OTI 54, lateral (14) and oral (15) views. 16 – 17. Miliolinella sp. 1, QM # G 465944 from OTI 20. 16. Lateral view. 17. Oral view. 18 – 20. Miliolinella sp. 2, QM # G 465901 from ST / HW 10. 18. Lateral view. 19. Lateral view. 20. Oral view.