Fig. 2F
Margarita expansa Sowerby, 1838a: 24; Sowerby, 1838b: pl. 134, figs. 16, 17
Photinula expansa — Melvill & Standen, 1907: 126; Melvill & Standen, 1912: 121
Margarella expansa — Zelaya, 2004: figs. 2, 4, 7, 16–18, 21, 22 (protoconch and radula)
Examined material. 3 an. and 9 sh. (MACN-In 40666).
Description. Shell width to 8.5 mm (up to 14.1 mm according to Strebel 1905a); trochiform, solid. Protoconch of about 1 convex whorl; transition to teleoconch poorly defined. Teleoconch of up to 4.5 whorls, slightly convex in outline; the latter widely laterally expanded, comprising about 85% of total shell height. Suture impressed. Surface white, shiny, iridescent green; only sculptured with faint growth lines. Aperture rounded, interior iridescent; columellar callus thick, expanded, forming a depression over the umbilical area. Operculum rounded, multispiral; pale brown, translucent.