Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Quadrulini | Quadrulina | Theliderma

Lea, 1831. Trans. Amer. Phil. Soc. 4 [O. 1]: 77, pl. 7, fig. 8.
Type(s): HOLOTYPE (MONOTYPY) USNM_84218, Alabama R., Ala.
Quadrula (s.s.) stapes — Simpson (1900)
Quadrula (s.s.) (Group of Q. metanevra) stapes — Simpson (1914)
Quadrula (Orthonymus) stapes — Frierson (1927)
Orthonymus stapes — Haas (1969)
Quadrula stapes — Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Lydeard et al. (1999), Jones et al. (2005), Williams et al. (2008), Bogan (2010), ITIS (2012), Haag (2012)
Theliderma stapes — IUCN (1996), Graf & Cummings (2007), Cummings & Graf (2010), Williams et al. (2017), Lopes-Lima et al. (2019), Graf & Cummings (2021), FMCS (2021), Neemuchwala et al. (2023), Hopper et al. (2023), FMCS (2025)
(misidentified reference to Unio retusa Lamarck, 1819)
Say, 1834. Amer. Conch. 6: ??.
Quadrula (s.s.) stapes — Simpson (1900)
Quadrula (s.s.) (Group of Q. metanevra) stapes — Simpson (1914)
(misidentified reference to Obovaria stegaria Rafinesque, 1820)
‘Rafinesque’ Küster, 1861. Conchyl. Cab. 9(2): 211, pl. 70, fig. 3.
Quadrula (s.s.) stapes — Simpson (1900)
Quadrula (s.s.) (Group of Q. metanevra) stapes — Simpson (1914)
Quadrula (s.s.) stapes — Simpson (1900)
Quadrula (s.s.) (Group of Q. metanevra) stapes — Simpson (1914)
Quadrula (Orthonymus) stapes — Frierson (1927)
Orthonymus stapes — Haas (1969)
Quadrula stapes — Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Lydeard et al. (1999), Jones et al. (2005), Williams et al. (2008), Bogan (2010), ITIS (2012), Haag (2012)
Theliderma stapes — IUCN (1996), Graf & Cummings (2007), Cummings & Graf (2010), Williams et al. (2017), Lopes-Lima et al. (2019), Graf & Cummings (2021), FMCS (2021), Neemuchwala et al. (2023), Hopper et al. (2023), FMCS (2025)