Unio (Monocondylaea) fossiculifera d’Orbigny, 1835
d’Orbigny, 1835. Mag. Zool. 5(61-62): 38.
d’Orbigny, 1846. Voyage dans l’Amérique Méridionale 5: 614, pl. 80, figs. 5-7 [as ‘Monocondylaea fossiculifera’].
Type(s): LECTOTYPE BMNH_54-9-4-1, Rio Parana, Prov. Corrientes, Argentina.

Fossula fossiculifera — Simpson (1900), Ihering (1910), Simpson (1914), Ortmann (1921), Thiele (1934), ... Pereira et al. (2014), Torres et al. (2018), Guerra et al. (2019), Graf & Cummings (2021), Torres et al. (2024)
Fossula fossiculifera fossiculifera — Haas (1931), Haas (1969), Mansur (1970), Quintana (1982)

Fossula balzani Ihering, 1893
Ihering, 1893. Arch. Naturg. 59(1): 65, pl. 3, fig. 1.
Ihering, 1910. Abh. Senckenb. Naturf. Ges. 32: 115.
Type(s): HOLOTYPE SMF_3793, Rio Paraguay an der Mündung des Rio Apá, Sao Paulo, Brazil. [Rio Paraguay at the mouth of the Rio Apá, Sao Paulo, Brazil].

Fossula balzani — Simpson (1900), Ihering (1910), Simpson (1914)
Fossula fossiculifera balzani — Haas (1931), Haas (1969), Quintana (1982)
Iheringella balzani — Morretes (1949)
Fossula fossiculifera — Bonetto (1966), Simone (2006)

Fossula brasiliensis Ihering, 1910
Ihering, 1910. Abh. Senckenb. Naturf. Ges. 32: 116, pl. 12, figs. 1a-1b.
Type(s): TYPE SMF_3794, Cachoeira Funil, Rio Paraguassú, Bahia, Brazil.

Fossula brasiliensis — Ihering (1910), Morretes (1949)
Fossula braziliensis [sic] — Simpson (1914)
Fossula fossiculifera braziliensis [sic] — Haas (1931)
Fossula fossiculifera — Figueiras (1965), Simone (2006)
Fossula fossiculifera brasiliensis — Haas (1969)
Fossula fossiculifera fossiculifera — Quintana (1982)

Fossula braziliensis Simpson, 1914
‘von Ihering’ Simpson, 1914. Descr. Cat. Naiades: 1398.
‘von Ihering’ Haas, 1931. Senckenbergiana 13: 50.
(error for Fossula brasiliensis Ihering, 1910)

Fossula balzani mattogrossensis Ihering, 1915
Ihering, 1915. Ammexp No. 5, Comm. Linhas Tel. Estrat Matto-Gross no Amazonas: 13, Abb. 4-5.
(intro'd as intra-sp. of Fossula balzani Ihering, 1893)
Type(s): HOLOTYPE MNRJ_34322, [locality unknown].

Fossula fossiculifera balzani — Haas (1931), Haas (1969), Quintana (1982)
Haasica balzani mattogrossensis — Morretes (1949)
Fossula fossiculifera — Bonetto (1966), Simone (2006)

Fossula venezuelensis Pilsbry & Olsson, 1944
Pilsbry & Olsson, 1944. Nautilus 57: 89, pl. 10.
Type(s): HOLOTYPE ANSP_179759, Rio Guarico, Barbacoas, Guarico, Venezuela.

Fossula venezuelensis — Haas (1969)
Fossula fossiculifera — Simone (2006)

Fossula piracicabana Ihering, 1891
Ihering, 1891. Zool. Anz. Leipzig. 14(380): ??. [nomen nudum]

Fossula fossiculifera — Simone (2006)

Monocondylaea fasciculifera Ihering, 1891
‘d’Orb.’ Ihering, 1891. Zool. Anz. Leipzig. 14(380): 482.
(error for Unio (Monocondylaea) fossiculifera d’Orbigny, 1835)

Fossula fossiculifera fossiculifera — Mansur (1970)