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 Nonion costiferum Cushman, 1926 Figure 7.13 1926 Nonionina costifera Cushman , p. 90, pl. 13, fig. 2a-c. 2014 Nonion costiferum Cushman ; Panchang and Nigam, pl. 33, fig. 10a-b. Description. Test elongate, compressed, umbilical portion depressed, wall finely perforate, surface smooth, umbilicus and the apertural side covered with pustules; chambers many, distinct, not inflated, of uniform size; periphery acute, slightly keeled, sutures distinct, slightly raised and costate; aperture an interiomarginal, small, low arch opening at the basal end of the apertural face.