Marshall, 1934. J. Washington Acad. Sci. 24(2): 78, figs. 1-3.
+ — Millard, 2001: 1069.
= Castalioides laddei [sic] — Haas, 1969: N460, fig. D50,5.
= Ecuadorea laddi (Marshall, 1934) — Modell, 1950: 143, pl. 11, fig. 1.
= Castalioides laddi Marshall, 1934 — Marshall, 1934: 78, figs. 1-3.