Guttulina d’Orbigny 1839

Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, Zootaxa 4215 (1), pp. 1-123 : 71

Guttulina d’Orbigny 1839

Guttulina sp. cf. G. bartschi Cushman & Ozawa 1930 ( Fig. 17 :6, 7)

Remarks. Collected specimens have the broad, globular chambers that are diagnostic for this species. The aboral chambers are strongly inflated, have rounded peripheries with lightly depressed sutures and the chambers taper up to the aperture. The aperture consists of terminal, radial slit-like segments that are fused at their peak ( Fig. 17 :6, 7). Despite this similarlity to Guttulina bartschi Cushman & Ozawa 1930 , this taxon has only been tentatively assigned due to the damaged nature of the test and the small amount of material available. Additionally, some other recorded occurrences of this taxon illustrate a test with more chambers than the CG specimens (e.g. Hayward et al., 1999, pl. 7, fig. 8; Loeblich & Tappan, 1994, pl. 145, figs 5–15; Parker, 2009, figs 291a–c).

Distribution within study area. Guttulina sp. cf. G. bartschi only occurred in the channel sample between Heron and Wistari Reefs.

Figures

FIGURE 17. (Unless otherwise specified all scale bars = 100 µm). 1 – 2. Spirillina sp. 1, QM # G 465974 from OTI 51. 1. Side view. 2. Oral view, scale bar = 50 µm. 3 – 5. Seguenzaella lacunata (Burrows & Holland, 1895), QM # G 465949 from OTI 47. Scale bar = 50 µm 3. Lateral view. 4. Peripheral view. 5. Oral view. 6 – 7. Guttulina cf. G. bartschi Cushman & Ozawa, 1930, QM # G 465998 from CHANNEL, Scale bar = 50 µm. 6. Lateral view. 7. Oral views. 8 – 9. Guttulina sp. 1, QM # G 466080 from CHANNEL. 8. Lateral view, scale bar = 200 µm. 9. Oral view. 10 – 11. Sigmoidella elegantissima (Parker & Jones, 1870), QM # G 465875 from CHANNEL. 10. Lateral view. 11. Oral view. 12 – 13. Webbinella? sp. 1, QM # G 465895 from ST 10. 12. Lateral view. 13. Peripheral view. 14 – 15. Fissurina bispinata Ujiié, 1963, QM # G 466136 from OTI 47. Scale bar = 20 µm. 14. Lateral view. 15. Oral view. 16 – 18. Fissurina sp. 1, QM # G 465934 from OTI 8. 16. Peripheral view, scale bar = 50 µm. 17. Oral view, scale bar = 50 µm. 18. Underside view, scale bar = 20 µm. 19 – 20. Saintclaroides marlysae McCulloch, 1981, QM # G 465923 from WL 2. 19. Spiral view. 20. Peripheral view.