Ilanga konos (Vilvens, 2009) nov. comb.

(Figures 64–68)

2009 Microgaza konos nov. spec.—Vilvens: p. 88, figs 64–66.

Material. Anda 1 (5); Anda 2 (2); Anda 6 (1); AndaDeVos (9); Tiep 2 (3).

Characterization. Shell broad and umbilicate H 1.3 mm, W 2.1 mm; P with distinct spiral ribs and axially arranged granulate microsculpture, DN 0.13–0.16 mm; P/T boundary sharp at 1.1 whorls; four spiral ribs on early T whorls, later whorls smooth; pinkish blotches; umbilical ridge narrow, four spiral ribs or more in umbilicus.

Distribution. Apart from the studied material, Ilanga konos is known only from the type locality Bashi channel, south Taiwan, from a depth of 305 m (Vilvens 2009).

Remarks. This species has been reassigned to Ilanga on the basis of genetic data that shows that all western Pacific and Indian Ocean ‘ Microgaza’ like species, such as Microgaza konos, fall into a clade with the type species of Ilanga (Williams et al. 2013) . Both Herbert (1987) and Marshall (1999) recognize Ilanga and Microgaza as distinct genera, but additional genetic studies are needed to confirm the delimitation of each.