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.

Unio (Monocondylaea) fossiculifera — d’Orbigny (1835)
Margarita (Margaritana) fossiculifera — Lea (1838)
Unio fossiculiferus — Hanley (1843), Sowerby (1868)
Monocondylæa fossiculifera — d’Orbigny (1846)
Margaron (Monocondylœa) fossiculifera — Lea (1852), Lea (1870)
Monocondylaea fossiculifera — Adams & Adams (1857)
Monocondylea fossiculifera — Petit de la Saussaye (1865)
Monocondylaea (sec. Fossula) fossiculifera — Fischer (1887)
Fossula fossiculifera — Simpson (1900), Ihering (1910), Simpson (1914), Ortmann (1921), ..., 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 — Ihering (1893), 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 — Simpson (1914)
Fossula fossiculifera braziliensis — Haas (1931)
Fossula fossiculifera — Figueiras (1965), Simone (2006)
Fossula fossiculifera brasiliensis — Haas (1969)
Fossula fossiculifera fossiculifera — Quintana (1982)

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 — Pilsbry & Olsson (1944), Haas (1969)
Fossula fossiculifera — Simone (2006)

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

Fossula piracicabana — Ihering (1891)
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)

Monocondylaea fasciculifera — Ihering (1891)
Fossula fossiculifera fossiculifera — Mansur (1970)

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 braziliensis — Simpson (1914)

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,

Fossula balzani mattogrossensis — Ihering (1915)
Fossula fossiculifera balzani — Haas (1931), Haas (1969), Quintana (1982)
Haasica balzani mattogrossensis — Morretes (1949)
Fossula fossiculifera — Bonetto (1966), Simone (2006)

Taxonomic History (since 1900)

Fossula fossiculifera — Simpson (1900), Ihering (1910), Simpson (1914), Ortmann (1921), ..., Torres et al. (2018), Guerra et al. (2019), Graf & Cummings (2021), Torres et al. (2024)
Fossula balzani — Simpson (1900), Ihering (1910), Simpson (1914)
Fossula brasiliensis — Ihering (1910), Morretes (1949)
Fossula braziliensis — Simpson (1914)
Fossula balzani mattogrossensis — Ihering (1915)
Fossula fossiculifera fossiculifera — Haas (1931), Haas (1969), Mansur (1970), Quintana (1982)
Fossula fossiculifera balzani — Haas (1931), Haas (1969), Quintana (1982)
Fossula fossiculifera braziliensis — Haas (1931)
Fossula venezuelensis — Pilsbry & Olsson (1944), Haas (1969)
Iheringella balzani — Morretes (1949)
Haasica balzani mattogrossensis — Morretes (1949)
Fossula fossiculifera brasiliensis — Haas (1969)