Work found, with species-group names introduced therein:
Pérez Farfante, I. and D. L. Henríquez. 1947. Diodora fragilis n. n. pro Diodora delicatula. Revista de la Sociedad Malacológica "Carlos de la Torre" 5 52. [Stated date: 09 Oct 1947; true date: pre 21 Oct.] Diodora fragilis