Triloculina echinata d’Orbigny, 1826

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 : 69

Triloculina echinata d’Orbigny, 1826

Figure 20.9-10

1826 Triloculina echinata d’Orbigny , p. 300, no. 14. 1999 Triloculina echinata d’Orbigny ; Nigam and Khare, p. 292, pl. 3, fig. 5.

Description. Test subovate, somewhat broad than long, wall calcareous, imperforate, surface ornamented with regular rows of ridges; chambers slightly inflated, arranged in a triloculine plan; peripheral margin highly carinate, sutures slightly depressed; aperture terminal, round on a slightly produced neck, bordered by a distinct lip, with a short bifid tooth.

Figures

FIGURE 20. 1, Parahauerinoides fragilissima (Brady, 1884) in dorsal view (scale equals 300 μm). 2, Pseudotriloculina sp., in dorsal view (scale equals 100 μm). 3, Pyrgo denticulata (Brady, 1884) in ventral view (scale equals 500 μm). 4. Pyrgo inornata (d’Orbigny, 1846) in ventral view (scale equals 300 μm). 5-6, Pyrgo oblonga (d’Orbigny, 1839a) in dorsal view (scale equals 300 μm) (5) and in ventral view (scale equals 300 μm) (6). 7, Pyrgo sp. in ventral view (scale equals 300 μm). 8, Pyrgo williamsoni (Silvestri, 1923) in ventral view (scale equals 300 μm). 9-10, Triloculina echinata d’Orbigny, 1826 in dorsal view (scale equals 200 μm) (9) and in ventral view (scale equals 200 μm) (10). 11-12, Triloculina insignis (Brady, 1881) in dorsal view (scale equals 300 μm) (11) and in ventral view (scale equals 200 μm) (12). 13-14, Triloculina oblonga (Montagu, 1803) in dorsal view (scale equals 300 μm) (13) and in ventral view (scale equals 300 μm) (14). 15, Triloculina schreiberiana d’Orbigny, 1839a in dorsal view (scale equals 200 μm). 16-17, Triloculina terquemiana (Brady, 1884) in lateral view (scale equals 400 μm) (16) and in dorsal view (scale equals 300 μm) (17). 18, Triloculina tricarinata d’Orbigny, 1826 in apertural view (scale equals 200 μm).