Apparently from Greek "tropaias", which is feminine. [details]
Melvill incorrectly gave the original combination as Chrysallida casta Adams, 1861, copying Tryon (1886), but Tryon ... [details]
Secondary homonym of Odostomia defolinia contracta (de Folin, 1872). [details]
Preoccupied in Oscilla by O. tornata (A. E. Verrill, 1884). [details]