Miliolinella

Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, Zootaxa 4215 (1), pp. 1-123 : 53

Miliolinella sp. 1 ( Fig. 11 :16, 17)

Remarks. This species is strikingly similar to Parker’s (2009, fig. 91a–k) Miliolinella sp. 1 collected from Ningaloo Reef. Both taxa have a free, porcelanous test with a rounded and inflated aboral end and a somewhat truncated oral end. The sutures are depressed and curved. The low arched aperture has a broad tooth that forms a flap across the full length of the aperture and a backward facing lip ( Fig. 11 :16, 17). However, the CG specimens generally lack an elongate test, though some of the specimens figured by Parker (2009, fig. 91a–f) appear to have a similar length to width ratio. The CG specimens also have sutures that are not as strongly oblique to the test axis. Parker (2009) synonymised his specimens with those of Loeblich & Tappan (1994) collected from the Timor Sea. However, these illustrated specimens also do not have such strongly oblique sutures and additionally they have a significantly thicker peristomal lip, a larger, deeper aperture and a considerably larger, convex, backward facing flap, similar to that of M. circularis . Parker (2009) also synonymised unillustrated specimens collected by Haig (1997) from the Exmouth Gulf, but the lack of formal illustration makes it difficult to confirm this synonymy.

Distribution within study area. Miliolinella sp. 1 was collected in low abundance (one to three specimens per site) from six sites in One Tree Lagoons, the most abundant being site 51 in Lagoon 2.

Figures

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.