Bivalvia | Unionida | Hyrioidea | Hyriidae | Hyriinae | Castaliini | Castaliella

Sowerby, 1869. Conch. Icon. 17: pl. 2, sp. 7, figs. 7a-b.
Type(s): HOLOTYPE BMNH_49.1.5.5, Hab._?
Tetraplodon quadratus — Simpson (1900), Simpson (1914)
Castalia (s.s.) quadrilatera quadrilatera — Modell (1950)
Castalia sulcata sulcata — Bonetto (1965)
Castalia quadrata — Haas (1969), Pereira et al. (2014), Santos-Neto et al. (2016), Mansur et al. (2020)
Castaliella sulcata — Simone (2006)
Castaliella quadrata — Graf & Cummings (2021), Campbell & Lydeard (2026)
Tetraplodon quadratus — Simpson (1900), Simpson (1914)
Castalia (s.s.) quadrilatera quadrilatera — Modell (1950)
Castalia sulcata sulcata — Bonetto (1965)
Castalia quadrata — Haas (1969), Pereira et al. (2014), Santos-Neto et al. (2016), Mansur et al. (2020)
Castaliella sulcata — Simone (2006)
Castaliella quadrata — Graf & Cummings (2021), Campbell & Lydeard (2026)