Sphaeroidinella dehiscens (Parker and Jones, 1865)

Symphonia, Tabita K. & Senthil, Nathan D., 2019, Taxonomic notes on Recent Foraminifera from the Continental Shelf-Slope Region of Southwestern Bay of Bengal, East Coast of India, Palaeontologia Electronica (55 A) 22 (3), pp. 1-89 : 51

Sphaeroidinella dehiscens (Parker and Jones, 1865)

Figure 14.9-10

1865 Sphaeroidinella bulloides d’Orbigny var. dehiscens Parker and Jones , p. 369, pl. 19, fig. 5a-b.

2010 Sphaeroidinella dehiscens (Parker and Jones) ; Ovechkina, Bylinskaya, and Uken, p. 248, fig. 9F, 9G.

Description. Test large, ovoid, outline weakly lobulate, wall calcareous, coarsely perforate, surface smooth and glossy in adults; chambers globular, rapidly increasing in size as added, chamber arrangement trochospiral, coiling tight, periphery broadly rounded, sutures depressed initially, later obscured by surface cortex in adults; aperture interiomarginal, umbilical in juveniles, slit-like in adults, with a continuous crenulated lip along the cortical margins.

Figures

FIGURE 14. 1-4, Globigerinoides sacculifera (Brady, 1877) in dorsal view (scale equals 500 μm) (1); in ventral view (scale equals 400 μm) (2); in dorsal view (scale equals 500 μm) (3); and in ventral view (scale equals 500 μm) (4). 5-6, Globigerinoides triloba (Reuss, 1850) in dorsal view (scale equals 400 μm) (5) and in ventral view (scale equals 400 μm) (6). 7-8, Globoturborotalita sp. in dorsal view (scale equals 100 μm) (7) and in ventral view (scale equals 100 μm) (8). 9-10, Sphaeroidinella dehiscens (Parker and Jones, 1865) in dorsal view (scale equals 400 μm) (9) and in ventral view (scale equals 400 μm) (10). 11, Candeina nitida d’Orbigny, 1839 in dorsal view (scale equals 100 μm). 12, Globigerinita glutinata (Egger, 1893) in dorsal view (scale equals 100 μm). 13-14, Globorotalia cultrata (d’Orbigny, 1839) in dorsal view (scale equals 100 μm) (13) and in ventral view (scale equals 100 μm) (14). 15-16, Globorotalia menardii (d’Orbigny, 1826) in dorsal view (scale equals 400 μm) (15) and in ventral view (scale equals 500 μm) (16). 17-18, Globorotalia tumida (Brady, 1877) in dorsal view (scale equals 500 μm) (17) and in ventral view (scale equals 500 μm) (18). 19-20, Globorotalia ungulata Bermúdez, 1961 in dorsal view (scale equals 300 μm) (19) and in ventral view (scale equals 200 μm) (20).