Unio caeruleus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 95 [105], pl. 13, fig. 25 [as ‘cæruleus’].
Type(s): HOLOTYPE USNM_85193, Bengal, India.

Unio caeruleus — Lea (1831), Ravenel (1834), Sowerby (1866)
Unio cæruleus — Jay (1835), Benson (1836), Hanley (1843), Hanley & Theobald (1870)
Margarita (Unio) cœruleus — Lea (1836), Lea (1838)
Margaron (Unio) cœruleus — Lea (1852)
Unio (Hyridella) cæruleus — Adams & Adams (1857)
Unio coeruleus — Küster (1861), Tapparone Canefri (1889)
Margaron (Unio) cæruleus — Lea (1870)
Nodularia (s.s.) caerulea — Simpson (1900), Preston (1912), Simpson (1914)
Nodularia (s.s.) caeruleus — Preston (1915)
Indonaia caerulea — Prashad (1922), Haas (1969), Bolotov et al. (2017), Bolotov et al. (2018), ..., Bolotov et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022)
Indonaia caeruleus — Srinivasa Rao (1928)
Nannonaia caerulea — Modell (1942)
Parreysia (Radiatula) caerulea — Subba Rao (1989), Nazneen & Begum (1994), Graf & Cummings (2007), Dey (2007)
Radiatula (Indonaia) caerulea — Nesemann et al. (2003)
Radiatula caerulea — Nesemann et al. (2007), Zieritz et al. (2018), Pfeiffer et al. (2018), Pfeiffer et al. (2019)
Nodularia caeruleus — Burdi et al. (2009)
Parreysia caerulea — Bogan (2010), IUCN (2010)
Radiatula aff. caerulea — Bolotov et al. (2017)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio nuttallianus Lea, 1856
Lea, 1856, Proc. Acad. Nat. Sci. 8: 103.
Lea, 1857, Jour. Acad. Nat. Sci. 3 [O. 6]: 310 [30], pl. 30, fig. 25.
Type(s): HOLOTYPE USNM_85201, India.

Unio nuttallianus — Lea (1856), Hanley & Theobald (1872)
Margaron (Unio) nuttallianus — Lea (1870)
Nodularia (s.s.) nuttalliana — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Indonaia olivaria — Haas (1969)
Parreysia (Radiatula) nuttalliana — Subba Rao (1989), Graf & Cummings (2007), Dey (2007)
Parreysia nuttalliana — Bogan (2010)
Parreysia nuttallianus — IUCN (2010)
Radiatula nuttalliana — Zieritz et al. (2018)
Indonaia nuttalliana — Graf & Cummings (2021)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio pachysoma Benson, 1862
Benson, 1862, Ann. Mag. Nat. Hist. 10: 186.
Type(s): TYPE BMNH_MP_431, Assam.

Unio pachysoma — Benson (1862), Hanley & Theobald (1870)
Nodularia (s.s.) pachysoma — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Indonaia pachysoma — Prashad (1922), Graf & Cummings (2021)
Indonaia caerulea — Haas (1969)
Parreysia (Radiatula) pachysoma — Subba Rao (1989), Nazneen & Begum (1994), Graf & Cummings (2007), Dey (2007)
Radiatula (Indonaia) pachysoma — Nesemann et al. (2003)
Radiatula pachysoma — Nesemann et al. (2007), Zieritz et al. (2018)
Nodularia pachysoma — Burdi et al. (2009)
Parreysia pachysoma — Bogan (2010), IUCN (2010)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio gaudichaudii Eydoux, 1838
Eydoux, 1838, Mag. Zool. 8: 190, pl. 59, fig. 3.

Unio gaudichaudii — Eydoux (1838)
Margaron (Unio) guadechaudii — Lea (1852)
Unio (Hyridella) gaudichaudii — Adams & Adams (1857)
Margaron (Unio) gaudechaudii — Lea (1870)
Nodularia (s.s.) gaudichaudi — Simpson (1900), Simpson (1914)
Nodularia (s.s.) caerulea var. gaudichaudi — Preston (1912)
Nodularia (s.s.) caeruleus var. gaudichaudi — Preston (1915)
Indonaia caerulea — Haas (1969)
Parreysia (Radiatula) caerulea gaudichaudi — Subba Rao (1989)
Parreysia (Radiatula) caerulea var. gaudichaudi — Dey (2007)
Radiatula gaudichaudi — Nesemann et al. (2007)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio keraudreni Eydoux, 1838
Eydoux, 1838, Mag. Zool. 8: 188, pl. 59, figs. 1-1a.

Unio keraudreni — Eydoux (1838)
Margaron (Unio) keraudreni — Lea (1852), Lea (1870)
Unio (Hyridella) keraudreni — Adams & Adams (1857)
Nodularia (s.s.) keraudreni — Simpson (1900), Simpson (1914)
Nodularia (s.s.) caerulea var. keraudreni — Preston (1912)
Nodularia (s.s.) caeruleus var. keraudreni — Preston (1915)
Indonaia caerulea — Haas (1969)
Parreysia (Radiatula) caerulea keraudreni — Subba Rao (1989)
Radiatula keraudreni — Nesemann et al. (2007)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Lampsilis argyratus Rafinesque, 1831
Rafinesque, 1831, Continuation: 7.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 84.

Lampsilis argyratus — Rafinesque (1831), Simpson (1900), Simpson (1914)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio coeruleus Lea, 1836
‘Lea’ of Authors.
Lea, 1836, Synopsis Fam. Naiades: 26.
Lea, 1838, Synopsis Fam. Naiades: 20.
Lea, 1852, Synopsis Fam. Naiades: 30 [as ‘cœruleus’].
Küster, 1861, Conchyl. Cab. 9(2): 228.
Connolly, 1925, Rec. Albany Mus. 3: [5].
(error for Unio caeruleus Lea, 1831)

Unio coeruleus — Lea (1836)

Unio gerbidoni Eydoux, 1838
Eydoux, 1838, Mag. Zool. 8: 189, pl. 59, figs. 2-2b.

Unio gerbidoni — Eydoux (1838), Hanley & Theobald (1870)
Margaron (Unio) cœruleus — Lea (1852)
Margaron (Unio) cæruleus — Lea (1870)
Nodularia (s.s.) caerulea — Simpson (1900), Preston (1912), Simpson (1914)
Nodularia (s.s.) caeruleus — Preston (1915)
Indonaia caerulea — Haas (1969)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Margaron (Unio) guadechaudii Lea, 1852
‘Eyd.’ Lea, 1852, Synopsis Fam. Naiades: 32.
‘Eyd.’ Lea, 1870, Synopsis Fam. Naiades: 50.
(error for Unio gaudichaudii Eydoux, 1838)

Margaron (Unio) guadechaudii — Lea (1852)

Unio corrianus Küster, 1861
‘Lea’ Küster, 1861, Conchyl. Cab. 9(2): 229, pl. 77, fig. 5.
(misidentified reference to Unio corrianus Lea, 1834)

Unio corrianus — Küster (1861)
Unio marginalis var. corrianus — Nevill (1877)
Nodularia (s.s.) caerulea — Simpson (1900), Preston (1912), Simpson (1914)
Nodularia (s.s.) caeruleus — Preston (1915)

Unio evitatus Lea, 1866
Lea, 1866, Proc. Acad. Nat. Sci. 18: 133.
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 279, pl. 38, fig. 92.
Type(s): HOLOTYPE USNM_85191, Bengal.

Unio evitatus — Lea (1866)
Margaron (Unio) evitatus — Lea (1870)
Nodularia (s.s.) caerulea — Simpson (1900), Preston (1912), Simpson (1914)
Nodularia (s.s.) caeruleus — Preston (1915)
Indonaia caerulea — Haas (1969)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio trirostris Sowerby, 1868
‘Benson’ Sowerby, 1868, Conch. Icon. 16: pl. 65, sp. 331; errata.
(homonym of Unio trirostris Musgrave, 1863)

Unio trirostris — Sowerby (1868)
Unio caeruleus form trirostris — Sowerby (1868)
Margaron (Unio) favidens — Lea (1870)
Nodularia (s.s.) caerulea — Simpson (1900), Preston (1912), Simpson (1914)
Nodularia (s.s.) caeruleus — Preston (1915)
Indonaia caerulea — Haas (1969)

Unio pachystoma Paetel, 1890
‘Bens.’ Paetel, 1890, Cat. Conch.-Samml. 3: 162.
(error for Unio pachysoma Benson, 1862)

Unio pachystoma — Paetel (1890)
Nodularia (s.s.) pachysoma — Simpson (1900), Preston (1915)

Margaron (Unio) cristatus Preston, 1915
‘Lea’ Preston, 1915, Fauna Brit. India: 136.
(error for Unio evitatus Lea, 1866)

Margaron (Unio) cristatus — Preston (1915)

Trapezoideus dhanushori Annandale & Prashad, 1921
Prashad in Annandale & Prashad, 1921, Rec. Ind. Mus. 22: 611, figs. 30-31a,b.

Trapezoideus dhanushori — Annandale & Prashad (1921)
Trapezoideus misellus — Haas (1969)
Trapezoideus exolescens exolescens — Brandt (1974), Subba Rao (1989), Dey (2007)
Trapezoideus exolescens — IUCN (2010), He & Zhuang (2013)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)

Unio nuttaliana Subba Rao, 1989
Subba Rao, 1989, Freshw. Moll. India: figs. 428-429 caption.
(error for Unio nuttallianus Lea, 1856)

Unio nuttaliana — Subba Rao (1989)

Taxonomic History (since 1900)

Lampsilis argyratus — Simpson (1900), Simpson (1914)
Nodularia (s.s.) caerulea — Simpson (1900), Preston (1912), Simpson (1914)
Nodularia (s.s.) gaudichaudi — Simpson (1900), Simpson (1914)
Nodularia (s.s.) keraudreni — Simpson (1900), Simpson (1914)
Nodularia (s.s.) nuttalliana — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Nodularia (s.s.) pachysoma — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Nodularia (s.s.) caerulea var. gaudichaudi — Preston (1912)
Nodularia (s.s.) caerulea var. keraudreni — Preston (1912)
Nodularia (s.s.) caeruleus — Preston (1915)
Nodularia (s.s.) caeruleus var. gaudichaudi — Preston (1915)
Nodularia (s.s.) caeruleus var. keraudreni — Preston (1915)
Margaron (Unio) cristatus — Preston (1915)
Trapezoideus dhanushori — Annandale & Prashad (1921)
Indonaia caerulea — Prashad (1922), Haas (1969), Bolotov et al. (2017), Bolotov et al. (2018), ..., Bolotov et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022)
Indonaia pachysoma — Prashad (1922), Graf & Cummings (2021)
Indonaia caeruleus — Srinivasa Rao (1928)
Nannonaia caerulea — Modell (1942)
Indonaia olivaria — Haas (1969)
Trapezoideus misellus — Haas (1969)
Trapezoideus exolescens exolescens — Brandt (1974), Subba Rao (1989), Dey (2007)
Parreysia (Radiatula) caerulea — Subba Rao (1989), Nazneen & Begum (1994), Graf & Cummings (2007), Dey (2007)
Parreysia (Radiatula) caerulea gaudichaudi — Subba Rao (1989)
Parreysia (Radiatula) caerulea keraudreni — Subba Rao (1989)
Parreysia (Radiatula) nuttalliana — Subba Rao (1989), Graf & Cummings (2007), Dey (2007)
Parreysia (Radiatula) pachysoma — Subba Rao (1989), Nazneen & Begum (1994), Graf & Cummings (2007), Dey (2007)
Unio nuttaliana — Subba Rao (1989)
Radiatula (Indonaia) caerulea — Nesemann et al. (2003)
Radiatula (Indonaia) pachysoma — Nesemann et al. (2003)
Radiatula caerulea — Nesemann et al. (2007), Zieritz et al. (2018), Pfeiffer et al. (2018), Pfeiffer et al. (2019)
Parreysia (Radiatula) caerulea var. gaudichaudi — Dey (2007)
Radiatula gaudichaudi — Nesemann et al. (2007)
Radiatula keraudreni — Nesemann et al. (2007)
Radiatula pachysoma — Nesemann et al. (2007), Zieritz et al. (2018)
Nodularia caeruleus — Burdi et al. (2009)
Nodularia pachysoma — Burdi et al. (2009)
Parreysia caerulea — Bogan (2010), IUCN (2010)
Parreysia nuttalliana — Bogan (2010)
Parreysia nuttallianus — IUCN (2010)
Parreysia pachysoma — Bogan (2010), IUCN (2010)
Trapezoideus exolescens — IUCN (2010), He & Zhuang (2013)
Radiatula aff. caerulea — Bolotov et al. (2017)
Radiatula nuttalliana — Zieritz et al. (2018)
Indonaia nuttalliana — Graf & Cummings (2021)
Indonaia (caerulea-group) caerulea — Bolotov et al. (2022)