Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Popenaias
77 specimens + 24 GenBank vouchers

Lea, 1857. Proc. Acad. Nat. Sci. 9: 102.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 8]: 372 [54], pl. 66, fig. 197.
Type(s): LECTOTYPE USNM_85895 (by R.I. Johnson, 1999: 21), Rio Salado, near Leon, Mexico.
Unio (sec. Elliptio) popeii — Simpson (1900), Simpson (1914)
Unio (Nephronaias) popei — Martens (1900)
Lampsilis popei — Pilsbry (1910)
Elliptio popeii — Ortmann (1912)
Elliptio (Popenaias) popei — Frierson (1927), Haas (1929)
Elliptio (sec. Popenaias) popei — Thiele (1934)
Nephronaias (Popenaias) popeii — Haas (1969), Haas (1969)
Popenaias popei — Heard & Guckert (1970), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Howells et al. (1996), R.I. Johnson (1999), Contreras-Arquieta (2000), ITIS (2012), Haag (2012)
Popenaias popeii — IUCN (1996), Turgeon et al. (1998), Campbell et al. (2005), Zanatta & Murphy (2006), Graf & Cummings (2007), ... Freeman et al. (2025), Chen et al. (2025), FMCS (2025), Cummings et al. (2025), Campbell & Lydeard (2026)
Unio (sec. Elliptio) popeii — Simpson (1900), Simpson (1914)
Unio (Nephronaias) popei — Martens (1900)
Lampsilis popei — Pilsbry (1910)
Elliptio popeii — Ortmann (1912)
Elliptio (Popenaias) popei — Frierson (1927), Haas (1929)
Elliptio (sec. Popenaias) popei — Thiele (1934)
Nephronaias (Popenaias) popeii — Haas (1969), Haas (1969)
Popenaias popei — Heard & Guckert (1970), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Howells et al. (1996), R.I. Johnson (1999), Contreras-Arquieta (2000), ITIS (2012), Haag (2012)
Popenaias popeii — IUCN (1996), Turgeon et al. (1998), Campbell et al. (2005), Zanatta & Murphy (2006), Graf & Cummings (2007), ... Freeman et al. (2025), Chen et al. (2025), FMCS (2025), Cummings et al. (2025), Campbell & Lydeard (2026)