Nonionellina labradorica

Nonionellina labradorica (Dawson, 1860)

Figure 7.15

1860 Nonionina labradorica Dawson, p. 191, text-fig. 4.

2008 Nonionellina labradorica (Dawson); Riveiros and Patterson, p. 29, fig. 12.7a-c.

2010 Nonionellina labradorica (Dawson); Margreth, p. 123, pl. 36, fig. 4.

2014 Nonionellina labradorica (Dawson); Panchang and Nigam, pl. 34, figs. 8a-c, 9a-c.

Description. Test small, symmetrical on both sides, wall calcareous, finely perforate, surface smooth, granular pustules along the sutures, apertural side and the umbilicus; chambers few, rapidly increasing in size, planispirally arranged, coiling involute; periphery subacutely rounded, sutures distinct, curved and very slightly depressed; aperture an interiomarginal, narrow slit at the base of a broadly triangular apertural face.