species Pustulosa petrina (Gould, 1855): synonymy

Unio petrinus Gould, 1855

Gould, 1855. Proc. Boston Soc. Nat. Hist. 5: 228.
Type(s): HOLOTYPE MCZ_169291, Llanos River, Texas.

Quadrula (sec. Theliderma) petrina — Simpson (1900), Simpson (1914)
Quadrula (Bullata) petrina — Frierson (1927)
Quadrula (Pustulosa) petrina — Haas (1969)
Quadrula petrina — Turgeon et al. (1988), Williams et al. (1993), Howells et al. (1996), Turgeon et al. (1998), Serb et al. (2003), Bogan (2010), ITIS (2012), Szumowski et al. (2012), Haag (2012), Pfeiffer et al. (2016)
Amphinaias petrina — Graf & Cummings (2007), Cummings & Graf (2010)
Cyclonaias petrina — Williams et al. (2017), Burlakova et al. (2018), Johnson et al. (2018), Pieri et al. (2018), Lopes-Lima et al. (2019), Inoue et al. (2020), Graf & Cummings (2021), FMCS (2021), de Moulpied et al. (2022), Hopper et al. (2023)
Pustulosa petrina — Neemuchwala et al. (2023), FMCS (2025), Campbell & Lydeard (2026)

Unio bollii Call, 1881

Call, 1881. Amer. Natural. 15: 390.
Type(s): LECTOTYPE MCZ_5017 (by R.I. Johnson, 1956: 108), Colorado River [Austin], Texas.

Quadrula (sec. Theliderma) aurea — Simpson (1900), Simpson (1914)
Quadrula (Bullata) petrina — Frierson (1927)
Quadrula (Pustulosa) petrina — Haas (1969)
Quadrula petrina — Howells et al. (1996)
Cyclonaias petrina — Johnson et al. (2018), Lopes-Lima et al. (2019)

Unio pertrinus B.H. Wright, 1888

(error for Unio petrinus Gould, 1855)
‘Gld.’ B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [4].