Taxonomic notes on Recent Foraminifera from the Continental Shelf-Slope Region of Southwestern Bay of Bengal, East Coast of India Author Symphonia, Tabita K. Author Senthil, Nathan D. text Palaeontologia Electronica 2019 55 A 2019-09-30 22 3 1 89 http://dx.doi.org/10.26879/811 journal article 10.26879/811 1094-8074 10961656 Spiroloculina costifera Cushman, 1917 Figure 21.8 1917 Spiroloculina costifera Cushman , p. 34, pl. 6, figs. 1-3. 2014 Spiroloculina costifera Cushman ; Babu et al., p. 79, pl. 1, fig. 6. 2014 Spiroloculina costifera Cushman ; Gandhi and Nathan, p. 924, pl. 1, fig. 3a. Description. Test large, subcircular, compressed laterally, wall porcelaneous, imperforate, surface smooth, final chambers ornamented with long costae; chambers arcuate, final chamber slightly detached from the earlier chambers; peripheral margin highly carinate, sutures distinct, slightly depressed; aperture terminal, rounded at the end of a carinate neck, bordered by a rim with a bifid tooth.