The following species within the genus
Iothia are recognised by the
World Register of Marine Species : •
Iothia albescens (
Philippi, 1846) (nomen dubium) •
Iothia emarginuloides (Philippi, 1868) •
Iothia fulva (
O. F. Müller, 1776) •
Iothia lindbergi McLean, 1985 •
Iothia megalodon Warén, Nakano & Sellanes, 2011 ;Species brought into synonymy: •
Iothia antarctica (E. A. Smith, 1907): synonym of
Iothia emarginuloides (Philippi, 1868) •
Iothia coppingeri (E. A. Smith, 1881): synonym of
Iothia emarginuloides (Philippi, 1868) •
Iothia depressa (Hedley, 1916): synonym of
Nacella polaris (Hombron & Jacquinot, 1841): synonym of
Nacella concinna (Strebel, 1908) •
Iothia fulviformis (Egorova, 1972): synonym of
Iothia emarginuloides (Philippi, 1868) •
Iothia pelseneeri (Thiele, 1912): synonym of
Propilidium pelseneeri Thiele, 1912 •
Iothia radiata (M. Sars, 1851): synonym of
Piliscus commodus (Middendorff, 1851) ==References==