species Hyriopsis bialata Simpson, 1900: synonymy

Synonymy

Unio delphinus Lea, 1840

(homonym of Unio delphinus Spengler, 1793)
Lea, 1840. Proc. Amer. Phil. Soc. 1: 285.
specimen image from publication ‘Gruner’ Lea, 1842. Trans. Amer. Phil. Soc. 8 [O. 3]: 218, pl. 17, fig. 35.
Type(s): HOLOTYPE USNM_83910, New Holland.

Hyriopsis (s.s.) bialatus — Simpson (1900)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis bialata — Pfeiffer et al. (2021)

Unio delphinus Gruner, 1841

(renamed Hyriopsis bialatus Simpson, 1900; homonym of Unio delphinus Spengler, 1793)
Gruner, 1841. Arch. Naturg. 7(1): 276, pl. 11, figs. 1-1c.
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.) (Group of Hyriopsis bialata) 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)

Unio megapterus Morelet, 1864

(homonym of Metaptera megaptera Rafinesque, 1820)
Morelet, 1864. J. de Conch. 12: 159.

Hyriopsis (s.s.) bialatus — Simpson (1900), Brandt (1974)
Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis bialatus — Preston (1912)
Hyriopsis (s.s.) (Group of Hyriopsis bialata) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), IUCN (2012), Pfeiffer et al. (2021)

Hyriopsis bialatus Simpson, 1900

(new name for Unio delphinus Gruner, 1841; renamed Unio delphinopterus Dautzenberg & Fischer, 1905)
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 579.

Hyriopsis (s.s.) bialatus — Simpson (1900), 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), Bolotov et al. (2020)
Hyriopsis (s.s.) (Group of Hyriopsis bialata) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Haas (1969), Graf & Cummings (2007), IUCN (2012), ... Chen et al. (2025), Klymus et al. (2025), Campbell & Lydeard (2026), Wu et al. (2026), Zieritz et al. (2026)
“Hyriopsis (s.s.) bialatus” ** — Brandt (1974)
“Hyriopsis bialata” ** — Ng et al. (2016)
“Hyriopsis bialata” ** — Lopes-Lima et al. (2017), Lopes-Lima et al. (2020)
“Hyriopsis “bialatus”” ** — Muanta et al. (2019)
H. bialatus — Konopleva et al. (2019)
“Hyriopsis bialatus” ** — Muanta et al. (2019)
“Hyriopsis bialata” ** — Klymus et al. (2025)

Unio delphinopterus Dautzenberg & Fischer, 1905

(new name for Hyriopsis bialatus Simpson, 1900)
Dautzenberg & Fischer, 1905. J. de Conch. 53: 456.

Unio delphinopterus — Dautzenberg & Fischer (1905)
Hyriopsis (s.s.) (Group of Hyriopsis bialata) bialata — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Pfeiffer et al. (2021)
Hyriopsis (s.s.) bialatus — Brandt (1974)

Hyriopsis gracilis Haas, 1910

Haas, 1910. Nachr. Bl. Dtsch. Malak. Ges. 42: 101.

Hyriopsis gracilis — Haas (1910), Do et al. (2018), Graf & Cummings (2021)
Hyriopsis (s.s.) (Group of Hyriopsis bialata) gracilis — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Pfeiffer et al. (2021)
Hyriopsis (s.s.) bialatus — Brandt (1974)
“Hyriopsis gracilis” ** — Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020)
“H. gracilis” ** — Konopleva et al. (2019)

Taxonomic History (since 1900)

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), 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), Bolotov et al. (2020)
Hyriopsis (s.s.) (Group of Hyriopsis bialata) bialata — Simpson (1914)
Hyriopsis (s.s.) (Group of Hyriopsis bialata) gracilis — Simpson (1914)
Hyriopsis bialata — Haas (1924), Haas (1969), Haas (1969), Graf & Cummings (2007), IUCN (2012), ... Chen et al. (2025), Klymus et al. (2025), Campbell & Lydeard (2026), Wu et al. (2026), Zieritz et al. (2026)
Hyriopsis delphinus — Thiele (1934), Modell (1942)
“Hyriopsis (s.s.) bialatus” ** — Brandt (1974)
“Hyriopsis bialata” ** — Ng et al. (2016)
“Hyriopsis bialata” ** — Lopes-Lima et al. (2017), Lopes-Lima et al. (2020)
“Hyriopsis “bialatus”” ** — Muanta et al. (2019)
H. bialatus — Konopleva et al. (2019)
“Hyriopsis bialatus” ** — Muanta et al. (2019)
“Hyriopsis gracilis” ** — Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020)
“H. gracilis” ** — Konopleva et al. (2019)
“Hyriopsis bialata” ** — Klymus et al. (2025)

MUSSELpdb

Taxonomy

Geography