Unio aferula Lea, 1864
Lea, 1864. Proc. Acad. Nat. Sci. 16: 109.
Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 34 [38], pl. 13, fig. 34 [as ‘aferulus’].
Type(s): HOLOTYPE (MONOTYPY) USNM_84058, L. Nyassa, Africa.

Parreysia (s.s.) aferula — Simpson (1900), Simpson (1914)
Parreyssia [sic] aferula — Kobelt (1910)
Unio aferula — Pilsbry & Bequaert (1927)
Nyassunio nyassaensis — Haas (1936), Haas (1969), Daget (1998)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis aferula — Crowley et al. (1964)
Coelatura nyassaensis — Scholz & Glaubrecht (2004)

Unio kirkii Lea, 1864
Lea, 1864. Proc. Acad. Nat. Sci. 16: 108.
Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 32 [36], pl. 12, fig. 30.
Type(s): HOLOTYPE (MONOTYPY) USNM_84056, L. Nyassa, Central Africa.

Parreysia (s.s.) kirkii — Simpson (1900), Simpson (1914)
Parreyssia [sic] kirkii — Kobelt (1910)
— Pilsbry & Bequaert (1927)
Nyassunio nyassaensis — Haas (1936), Haas (1969), Daget (1998)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis nyassaensis — Crowley et al. (1964)
Coelatura nyassaensis — Scholz & Glaubrecht (2004)

Unio nyassaensis Lea, 1864
Lea, 1864. Proc. Acad. Nat. Sci. 16: 108.
Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 33 [37], pl. 12, fig. 32.
(renamed Unio nyassanus Bourguignat, 1889)
Type(s): HOLOTYPE (MONOTYPY) USNM_84057, L. Nyassa, Africa.

Parreysia (s.s.) nyassaensis — Simpson (1900), Simpson (1914)
Parreyssia [sic] nyassaënsis — Kobelt (1910)
Unio nyassaensis — Pilsbry & Bequaert (1927)
Nyassunio nyassaensis — Haas (1936), Haas (1969), Daget (1998), Graf & Cummings (2007), IUCN (2010), Bogan (2010), Graf & Cummings (2011), Ortiz-Sepulveda et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2024)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis nyassaensis — Crowley et al. (1964)
Parreysia (Nyassunio) nyassaensis — Haas (1969)
Caelatura [sic] nyassaensis — Appleton (1979), Mandahl-Barth (1988)
Coelatura nyassaensis — Scholz & Glaubrecht (2004)

Unio nyassae Sowerby, 1866
Sowerby, 1866. Conch. Icon. 16: pl. 41, sp. 224, figs. 224a-b [changed in errata to ‘nyssensis’].

Parreysia (s.s.) nyassaensis — Simpson (1900), Simpson (1914)
Unio nyassaensis — Pilsbry & Bequaert (1927)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis nyassaensis — Crowley et al. (1964)

Unio nyassensis Sowerby, 1868
‘Lea’ of Authors.
Sowerby, 1868. Conch. Icon. 16: Errata.
Lea, 1870. Synopsis Fam. Naiades: 30.
(error for Unio nyassaensis Lea, 1864)

Parreysia nyassaensis — Leloup (1950)

Unio hermosus Bourguignat, 1889
‘Lea’ E.A. Smith, 1881. Proc. Zool. Soc. London 1881: pl. 34, fig. 34b. [in part]
Bourguignat, 1889. Bull. Soc. Malac. France 6: 38.
Type(s): HOLOTYPE BMNH_1880-12-20-130, Lake Nyassa.

Parreysia (s.s.) nyassaensis — Simpson (1900), Simpson (1914)
Unio hermosus — Pilsbry & Bequaert (1927)
Nyassunio nyassaensis — Haas (1936), Haas (1969), Daget (1998)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis nyassaensis — Crowley et al. (1964)

Unio nyassanus Bourguignat, 1889
Bourguignat, 1889. Bull. Soc. Malac. France 6: 38.
(new name for Unio nyassaensis Lea, 1864)

Parreysia (s.s.) nyassaensis — Simpson (1900), Simpson (1914)
Unio nyassaensis — Pilsbry & Bequaert (1927)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis nyassaensis — Crowley et al. (1964)
Nyassunio nyassaensis — Daget (1998)

Unio (Nodularia) caesariana Preston, 1913
Preston, 1913. Rev. Zool. Afr. 3(1): 60, pl. 4, fig. 9.
Type(s): HOLOTYPE (MONOTYPY) MRAC_56588, Lac Nyassa.

— Pilsbry & Bequaert (1927), Mandahl-Barth (1988)
Nyassunio nyassaensis — Haas (1936), Haas (1969)
Parreysia nyassaensis — Leloup (1950)
Indonaia mossambicensis — Crowley et al. (1964)
Coelatura hypsiprymna — Daget (1998)

Unio nyassanus [sic] var. hercules Preston, 1913
Preston, 1913. Rev. Zool. Afr. 3(1): 59, pl. 4, fig. 10.
(intro'd as intra-sp. of Unio nyassaensis Lea, 1864)
Type(s): HOLOTYPE (MONOTYPY) MRAC_56413, Riv. Shire, ... Lac Nyassa.

— Pilsbry & Bequaert (1927)
Nyassunio nyassaensis — Haas (1936), Haas (1969), Daget (1998)
Parreysia nyassaensis — Leloup (1950)
Nyassunio nyassaensis hercules — Crowley et al. (1964)

Nyassunio ecclesi Crowley et al., 1964
Woodward in Crowley et al., 1964. Annals Mus. R. Afr. Cent. 131: 52, pl. 6, figs. 39-40.
Type(s): HOLOTYPE MRAC_793224, Nyassaland: Lac Nyassa.

Nyassunio ecclesi — Crowley et al. (1964)
Nyassunio nyassaensis — Daget (1998)
Coelatura nyassaensis — Scholz & Glaubrecht (2004)

Unio afferulus R.I. Johnson, 1974
‘Lea’ R.I. Johnson, 1974. Spec. Occ. Publ. (2): 11.
(error for Unio aferula Lea, 1864)

Nyassunio nyassaensis — Daget (1998)

Unio nyassaensis E.A. Smith, 1881
‘Lea’ E.A. Smith, 1881. Proc. Zool. Soc. London 1881: pl. 34, fig. 34b. [in part]
(reference to Unio nyassaensis Lea, 1864)

Unio hermosus — Pilsbry & Bequaert (1927)
Nyassunio nyassaensis nyassaensis — Crowley et al. (1964)

Unio nyassanus Preston, 1913
‘Lea’ Preston, 1913. Rev. Zool. Afr. 3(1): 59.
(error for Unio nyassaensis Lea, 1864)