Spirorutilus carinatus (d’Orbigny, 1846)

Figure 15.21

1846 Textularia carinata d’Orbigny, p. 247, pl. 14, figs. 32-34.

2001 Spiroplectinella pseudocarinata (Cushman); Szarek, p. 88, pl. 6, figs. 3-6.

2014 Textularia pseudocarinata (Cushman); Panchang and Nigam, pl. 4, fig. 14a-b.

Description. Test triangular, flattened laterally, flanges extending at the sides, wall agglutinated, surface rough; chambers biserially arranged, rapidly increasing in size as added; periphery carinate, sutures distinct, raised ridges; aperture terminal, large, low arched opening, bordered by a rim.