Bolivina d’Orbigny 1839

Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, Zootaxa 4215 (1), pp. 1-123 : 75-77

Bolivina d’Orbigny 1839

Bolivina variabilis ( Williamson 1858) ( Fig. 18 :4–9)

1858 Textularia variabilis Williamson , p. 76, pl. 6, figs 162, 163.

1980 Bolivina variabilis (Williamson) ; Boltovskoy et al., p. 18, pl. 4, figs 1–4. 1993 Bolivina variabilis (Williamson) ; Hottinger et al., p. 91, pl. 110, figs 1–4; pl. 111, figs 1, 2. 1994 Bolivina variabilis (Williamson) ; Loeblich & Tappan, p. 111, pl. 216, figs 7–15. 1995 Bolivina doniezi Cushman & Wickenden ; Yassini & Jones, p. 129, figs 520, 521, 525. 2009 Bolivina variabilis (Williamson) ; Parker, p. 434, figs 315a–k.

2012 Bolivina variabilis (Williamson) ; Debenay, p. 172, pl. 12.

Description. See Boltovskoy et al. (1980, p. 18, pl. 4, figs 1–4) and Hottinger et al. (1993, p. 91, pl. 110, figs 1–4; pl. 111, figs 1, 2).

Remarks. Bolivina variabilis Williamson 1858 has an elongate, tapering, slender biserial test with a reticulate, polygonal, pitted ornament that extends over the entire test. The ornament decreases in spacing and size from the aboral to oral end. The sutures are depressed, the final chambers are slightly inflated and the aperture is ovate with a simple toothplate that extends from a partial apertural rim ( Fig. 18 :4–9).

Williamson (1858) did not designate a type locality from the British Isles for B. variabilis ( Ellis & Messina 1940) . Despite this, this species has an expansive global distribution ( Boston , Torquay , Arran , Skye , Fowey , Shetland, Brixham , Whitehaven , Exmouth , Plymouth Sound and Eddystone—Williamson 1858; Puerto Deseado— Boltovskoy et al. 1980; Gulf of Aqaba—Hottinger et al. 1993; Western Timor sea from 93–95 m and Timor trough from 1159 m— Loeblich & Tappan 1994; coastal lagoons, inlet channels and sheltered oceanic embayments from the southeastern coast of Australia—Yassini & Jones 1995; Ningaloo Reef—Parker, 2009; New Caledonia from 5– 40 m—Debenay 2012).

Distribution within study area. Bolivina variabilis was collected in low abundance (one to nine specimens per site) most commonly in One Tree Lagoon 1. This species was absent from Wistari Reef.

Figures

FIGURE 18. (Unless otherwise specified all scale bars = 100 µm). 1 – 3. Abditodentrix rhomboidalis (Millett, 1899), scale bar = 50 µm. 1 – 2. QM # G 465946 from OTI 43, lateral (1) and oral (2) views. 3. QM # G 465932 from OTI 1, lateral view. 4 – 9. Bolivina variabilis (Williamson, 1858). 4 – 5. QM # G 466137 from OTI 43, scale bar = 50 µm, lateral (4) and oral (5) views. 6 – 7. QM # G 465933 from OTI 8, lateral (6) and oral (7) views. Scale bar for 7 = 200 µm. 8 – 9. QM # G 465935 from OTI 8, lateral (8) and oral (9) views. 10 – 11. Sagrinella jugosa (Brady, 1884), QM # G 465975 from OTI 47. Scale bar = 50 µm 10. Lateral view. 11. Oral view. 12 – 13. Rugobolivinella elegans (Parr, 1932), QM # G 465941 from OTI 20. 12. Lateral view. 13. Oral view. 14 – 15. Loxostomina limbata (Brady, 1884), QM # G 465829 from OTI 39. 14. Lateral view. 15. Oral view. 16 – 17. Favocassidulina favus (Brady, 1877), QM # G 465948 from OTI 47. Scale bar = 50 µm. 16. Spiral view. 17. Umbilical view. 18 – 19. Globocassidulina bisecta Nomura, 1983, QM # G 466001 from OTI 47. Scale bar = 50 µm. 18. Lateral view. 19. Oral view. 20 – 21. Siphogenerina raphana (Parker & Jones, 1865), QM # G 465787 from ST / HW 2. 20. Lateral view, scale bar = 200 µm. 21. Oral view.