Genus Ethaliella Pilsbry, 1905

Ethaliella Pilsbry, 1905: 115 .

Type species

Ethalia floccata G.B. Sowerby III, 1903 (original designation), Recent, Japan.

Diagnosis

Shell small (diameter <10 mm), lenticular to trochoid-turbiniform, umbilicate; smooth or with fine, close-set spiral cords; axial sculpture weak; umbilical rim thickened, often radially plicate and sometimes with a tongue-like parietal callus lobe; umbilical funicle absent.

Operculum corneous, multispiral with outer whorls relatively broad; peripheral fringe narrow, radially striate; spiral microsculpture present.

Radula with base-plates of rachidian and lateral teeth thin, broadly expanded laterally and extensively overlapping, anterior edge with vestige of shaft; inner marginal tooth transitional, cusps of marginals 3–8 largest, somewhat palmate; central denticle rounded, not conspicuously larger than others; denticles on outer margin long and pointed.

Remarks

The observations in the above diagnosis concerning the operculum, radula and external anatomy relate to E. rhodomphala (Souverbie, 1875) . That they also apply to the type species remains to be established.