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Page last updated
Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

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Bivalvia | Unionida | Unionoidea | Unionidae | Parreysiinae | Indochinellini | Indonaia

species Indonaia corbis (Hanley, 1856): synonymy
     25 specimens + 43 Genbank vouchers

Unio corbis Hanley, 1856
‘Benson, MS’ Hanley, 1856. Illustr. Descr. Cat. Rec. Bivalve Shells: 386, pl. 23, fig. 43.

Parreysia (s.s.) corbisSimpson (1900), Preston (1912), Simpson (1914), Preston (1915), Subba Rao (1989), Graf & Cummings (2007), Ramakrishna & Dey (2007)
Parreysia corbisPrashad (1932), Haas (1969), Bogan (2010), IUCN (2010), Graf & Cummings (2021)
Indonaia (cylindrica-group) gratiosaBolotov et al. (2022)
Indonaia (caerulea-group) corbisBolotov et al. (2024)
Indonaia corbisCampbell & Lydeard (2026)

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

Nodularia (s.s.) pachysomaSimpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Indonaia pachysomaPrashad (1922), Graf & Cummings (2021)
Indonaia caeruleaHaas (1969)
Parreysia (Radiatula) pachysomaSubba Rao (1989), Nazneen & Begum (1994), Graf & Cummings (2007), Ramakrishna & Dey (2007)
Radiatula (Indonaia) pachysomaNesemann et al. (2003)
Radiatula pachysomaNesemann et al. (2007), Zieritz et al. (2018)
Nodularia pachysomaBurdi et al. (2009)
Parreysia pachysomaBogan (2010), IUCN (2010)
Indonaia (caerulea-group) caeruleaBolotov et al. (2022)
Indonaia (caerulea-group) corbisBolotov et al. (2024)

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

Trapezoideus dhanushoriAnnandale & Prashad (1921)
Trapezoideus misellusHaas (1969)
Trapezoideus exolescens exolescensBrandt (1974), Subba Rao (1989), Ramakrishna & Dey (2007)
Trapezoideus exolescensIUCN (2010), He & Zhuang (2013)
Indonaia (caerulea-group) caeruleaBolotov et al. (2022)
Indonaia (caerulea-group) corbisBolotov et al. (2024)

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

Nodularia (s.s.) pachysomaSimpson (1900), Preston (1915)

Indonaia caerulea Imsong & Murali, 2023
Imsong & Murali, 2023. Uttar Pradesh J. Zool. 44(20): 32, fig. 1F.
(misidentified reference to Unio caeruleus Lea, 1831)

Indonaia (caerulea-group) corbisBolotov et al. (2024)

Indonaia subclathrata Imsong & Murali, 2023
Imsong & Murali, 2023. Uttar Pradesh J. Zool. 44(20): 32, fig. 1E.
(misidentified reference to Unio misellus var. subclathratus Martens, 1899)

Indonaia (caerulea-group) corbisBolotov et al. (2024)

Taxonomic History (since 1900)

Parreysia (s.s.) corbisSimpson (1900), Preston (1912), Simpson (1914), Preston (1915), Subba Rao (1989), Graf & Cummings (2007), Ramakrishna & Dey (2007)
Nodularia (s.s.) pachysomaSimpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Trapezoideus dhanushoriAnnandale & Prashad (1921)
Indonaia pachysomaPrashad (1922), Graf & Cummings (2021)
Parreysia corbisPrashad (1932), Haas (1969), Bogan (2010), IUCN (2010), Graf & Cummings (2021)
Indonaia caeruleaHaas (1969)
Trapezoideus misellusHaas (1969)
Trapezoideus exolescens exolescensBrandt (1974), Subba Rao (1989), Ramakrishna & Dey (2007)
Parreysia (Radiatula) pachysomaSubba Rao (1989), Nazneen & Begum (1994), Graf & Cummings (2007), Ramakrishna & Dey (2007)
Radiatula (Indonaia) pachysomaNesemann et al. (2003)
Radiatula pachysomaNesemann et al. (2007), Zieritz et al. (2018)
Nodularia pachysomaBurdi et al. (2009)
Parreysia pachysomaBogan (2010), IUCN (2010)
Trapezoideus exolescensIUCN (2010), He & Zhuang (2013)
Indonaia (cylindrica-group) gratiosaBolotov et al. (2022)
Indonaia (caerulea-group) caeruleaBolotov et al. (2022)
Indonaia (caerulea-group) corbisBolotov et al. (2024)
Indonaia corbisCampbell & Lydeard (2026)

 
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