Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Epioblasma

Conrad, 1834. New Fresh-Water Shells: 33, pl. 5, fig. 1.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 254.
Type(s): HOLOTYPE ANSP_59860, Alabama.
Truncilla (s.s.) penita — Simpson (1900)
Truncilla penita — Ortmann (1912)
Truncilla (s.s.) (Group of T. brevidens) penita — Simpson (1914)
Dysnomia (Penita) penita — Frierson (1927), Haas (1969), Haas (1969)
Epioblasma (sec. Penita) penitum — Thiele (1934)
Dysnomia penita — Burch (1975)
Plagiola (s.s.) penita — R.I. Johnson (1978)
Epioblasma penita — Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Lydeard et al. (1999), IUCN (2000), ... Haag (2012), Williams et al. (2017), FMCS (2021), Hopper et al. (2023), FMCS (2025)
Epioblasma penit a [sic] — Graf & Cummings (2021)
Truncilla (s.s.) penita — Simpson (1900)
Truncilla penita — Ortmann (1912)
Truncilla (s.s.) (Group of T. brevidens) penita — Simpson (1914)
Dysnomia (Penita) penita — Frierson (1927), Haas (1969), Haas (1969)
Epioblasma (sec. Penita) penitum — Thiele (1934)
Dysnomia penita — Burch (1975)
Plagiola (s.s.) penita — R.I. Johnson (1978)
Epioblasma penita — Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Lydeard et al. (1999), IUCN (2000), ... Haag (2012), Williams et al. (2017), FMCS (2021), Hopper et al. (2023), FMCS (2025)
Epioblasma penit a [sic] — Graf & Cummings (2021)