Figure 6.1 - 2 1788 Nautilus spengleri Gmelin, p. 3371. 2005 Calcarina spengleri (Gmelin); Renema and Hohenegger, p. 16, pl. 1, figs. 1 - 10; text-fig. 1. 2014 Calcarina spengleri (Gmelin); Panchang and Nigam, pl. 37, figs. 9 a-b, 10 a-b. Description. Test large, biconvex, side view lenticular, wall calcareous, coarsely perforate, surface ornamented with few, granulated calcitic knobs in the centre; chambers many, final chambers long, narrow and inflated, chamber arrangement trochospiral; periphery with long, tapering, blunt spines; sutures distinct only in the final chambers, slightly depressed on the spiral side, radial and depressed on the umbilical side; aperture not seen.
Sumber: Taxonomic notes on Recent Foraminifera from the Continental Shelf-Slope Region of Southwestern Bay of Bengal, East Coast of India