Bivalvia | ... | Unionoidea | Unionidae | Gonideinae | Rectidentini | Rectidentina | Hyriopsis
85 specimens + 9 GenBank vouchers

Lea, 1840. Proc. Amer. Phil. Soc. 1: 285.
‘Gruner’ Lea, 1842. Trans. Amer. Phil. Soc. 8 [O. 3]: 218, pl. 17, fig. 35.
(homonym of Unio delphinus Spengler, 1793)
Type(s): HOLOTYPE USNM_83910, New Holland.
Hyriopsis (s.s.) bialatus — Simpson (1900)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis bialata — Pfeiffer et al. (2021)

Gruner, 1841. Arch. Naturg. 7(1): 276, pl. 11, figs. 1-1c.
(renamed Hyriopsis bialatus Simpson, 1900; homonym of Unio delphinus Spengler, 1793)
Type(s): TYPE USNM_83910, New Holland.
Hyriopsis (s.s.) bialatus — Simpson (1900), Brandt (1974), Habe (1977)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis bialatus — Preston (1912)
Hyriopsis (s.s.) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Haas (1969), Graf & Cummings (2007), IUCN (2012), Ng et al. (2020), Pfeiffer et al. (2021), Graf & Cummings (2021)
Hyriopsis delphinus — Thiele (1934), Modell (1942)
Morelet, 1864. J. de Conch. 12: 159.
(homonym of Metaptera megaptera Rafinesque, 1820)
Hyriopsis (s.s.) bialatus — Simpson (1900), Brandt (1974)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis bialatus — Preston (1912)
Hyriopsis (s.s.) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), IUCN (2012), Pfeiffer et al. (2021)
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 579.
(new name for Unio delphinus Gruner, 1841; renamed Unio delphinopterus Dautzenberg & Fischer, 1905)
Hyriopsis (s.s.) bialatus — Simpson (1900), Brandt (1974), Habe (1977), Soliman et al. (2016)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis bialatus — Preston (1912), Graf (2007), Sri-aroon et al. (2007), Bogan (2010), Bogan & Do (2014), Kongim et al. (2015), Do et al. (2018), Konopleva et al. (2019), Muanta et al. (2019), Bolotov et al. (2020)
Hyriopsis (s.s.) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Haas (1969), Graf & Cummings (2007), IUCN (2012), ... Zhang et al. (2024), Dai et al. (2025), Dai et al. (2025), Chen et al. (2025), Chen et al. (2025)
Hyriopsis “bialatus” — Muanta et al. (2019)
H. bialatus — Konopleva et al. (2019)
Dautzenberg & Fischer, 1905. J. de Conch. 53: 456.
(new name for Hyriopsis bialatus Simpson, 1900)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis (s.s.) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Pfeiffer et al. (2021)
Hyriopsis (s.s.) bialatus — Brandt (1974)
Haas, 1910. Nachr. Bl. Dtsch. Malak. Ges. 42: 101.
Hyriopsis gracilis — Haas (1910), Do et al. (2018), Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020), Graf & Cummings (2021)
Hyriopsis (s.s.) gracilis — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Pfeiffer et al. (2021)
Hyriopsis (s.s.) bialatus — Brandt (1974)
H. gracilis — Konopleva et al. (2019)
Hyriopsis (s.s.) bialatus — Simpson (1900), Brandt (1974), Habe (1977), Soliman et al. (2016)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis gracilis — Haas (1910), Do et al. (2018), Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020), Graf & Cummings (2021)
Hyriopsis bialatus — Preston (1912), Graf (2007), Sri-aroon et al. (2007), Bogan (2010), Bogan & Do (2014), Kongim et al. (2015), Do et al. (2018), Konopleva et al. (2019), Muanta et al. (2019), Bolotov et al. (2020)
Hyriopsis (s.s.) bialata — Simpson (1914)
Hyriopsis (s.s.) gracilis — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Haas (1969), Graf & Cummings (2007), IUCN (2012), ... Zhang et al. (2024), Dai et al. (2025), Dai et al. (2025), Chen et al. (2025), Chen et al. (2025)
Hyriopsis delphinus — Thiele (1934), Modell (1942)
Hyriopsis “bialatus” — Muanta et al. (2019)
H. bialatus — Konopleva et al. (2019)
H. gracilis — Konopleva et al. (2019)