Original Description of Struthioptera osiris by Finlay & Marwick, 1937, p. 62:
- "Shell large, spire about equalling the aperture in height. Whorls angled slightly below the middle and having a long, sloping shoulder. Body-whorl biangulate, base slightly convex. Sculpture: the shoulder-angle bears very weak knobs, about 20 or more per whorl, and the whole surface, so far as can be seen, has fine, regular, spaced, spiral threads, from 20-25 per whorl, the upper ones farther apart than the lower. The base has similar fine, spaced spirals, probably numbering about 30. The wing on the outer lip is thickened and reflexed at the margin, and the shoulder angle continues as the keel of a strong upward and backward directed hook the point of which is about the level of the preceding suture. In shape and disposition it is the same as the wing of S. haastiana. Columella is produced to a sharp point. Inner lip moderately callused above, and forming a rounded pad on the base of the body whorl."
Locus typicus: Wangaloa, South Otago, South Island, New Zealand
Stratum typicum: early Danian, Paleocene
Etymology: named after the god Osiris