Globigerinoides trilobus (Reuss, 1850)

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

Globigerinoides trilobus (Reuss, 1850)

Figure 14.5-6

1850 Globigerina triloba Reuss , p. 374, pl. 47, fig. 11a-c.

1983 Globigerinoides triloba (Reuss) ; Kennet and Srinivasan, p. 62, pl. 10, fig. 4; pl. 13, figs. 1- 3.

2010 Globigerinoides trilobus (Reuss) ; Ovechkina, Bylinskaya and Uken, p. 246, fig. 8E, 8F.

Description. Test trilobate, wall coarsely perforate, surface ornamented with spines; chambers globular, increasing in size as added, chamber arrangement trochospiral; periphery rounded, sutures very distinct and depressed; primary aperture umbilical, slit-like or low, slightly wide symmetrical arch, secondary apertures subrounded.

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).