Anodon obtusus Wagner, 1827
Spix in Wagner, 1827. Test. Fluv. Brasil.: 30, pl. 22, fig. 3.
Valenciennes, 1827. Coq. Mar. Biv.: pl. 48, figs. 3a-b.
Type(s): SYNTYPE SMF_3808, Brasilien.

Glabaris (sec. Styganodon) obtusus — Simpson (1900)
Glabaris obtusa — Ihering (1910)
Anodontites (sec. Styganodon) obtusus — Simpson (1914)
Anodontites (s.s.) obtusa — Ortmann (1921)
Anodontites (s.s.) obtusus — Haas (1931), Haas (1949), Haas (1969), Rumi et al. (2008), Pereira et al. (2014)
Anodontites (Styganodon) obtusa obtusa — Morretes (1949)
Anodontites obtusus — Simone (2006), Graf & Cummings (2007), Bogan (2010), Mansur et al. (2020)
Anodontites obtusa — Graf & Cummings (2021)

Anodon obtusus var. lituratum Wagner, 1827
Spix in Wagner, 1827. Test. Fluv. Brasil.: 30, pl. 22, fig. 4, var b.
Type(s): SYNTYPE SMF_3807, Brasilien.

Glabaris (sec. Styganodon) lituratus — Simpson (1900)
Anodontites (sec. Styganodon) lituratus — Simpson (1914)
Anodontites (s.s.) obtusa — Ortmann (1921)
Anodontites (s.s.) obtusus — Haas (1931), Haas (1969)
Anodontites obtusus — Simone (2006)

Anodon litturatum Moricand, 1837
‘Spix’ of Authors.
Moricand, 1837. Mém. Soc. Phys. Hist. Nat. Genève 8(1): 147.
Hupé, 1857. [in] Castelnau, Anim. Nouv. Rares d’Amer. Sud: 87, pl. 17, fig. 4 [as ‘Anodonta litturataq’].

Glabaris (sec. Styganodon) lituratus — Simpson (1900)
Anodontites (sec. Styganodon) lituratus — Simpson (1914)

Anodonta liturata Sowerby, 1868
‘Hupé’ of Authors.
Sowerby, 1868. Conch. Icon. 17: pl. 20, sp. 78.
Ihering, 1890. Arch. Naturg. 56(1): 160.

Anodonta obtusa var. hohenackeri Ihering, 1890
Ihering, 1890. Arch. Naturg. 56(1): 161.

Anodontites (s.s.) obtusa — Ortmann (1921)

Glabaris obtusa juparana Ihering, 1910
Ihering, 1910. Abh. Senckenb. Naturf. Ges. 32: 131.
Type(s): TYPE SMF_3823, Lagoa Juparaná, St. Espirito Santo, Brasilien.

Glabaris obtusa juparana — Ihering (1910)
Anodontites (sec. Styganodon) obtusus var. juparanus — Simpson (1914)
Anodontites (s.s.) obtusus — Haas (1931), Haas (1969)
Anodontites (Styganodon) obtusa juparana — Morretes (1949)
Anodontites obtusus — Simone (2006)

Anodontites bartschi F. Baker, 1913
F. Baker, 1913. Proc. Acad. Nat. Sci. 65: 668, pl. 27, figs. 3-4.
Type(s): SYNTYPE ANSP_109370, Rio Tapajoz, Pinhel, Brazil.

Anodontites bartschi — F. Baker (1913)
Anodontites (s.s.) obtusus — Haas (1931), Haas (1969)
Anodontites (Styganodon) bartschi — Morretes (1949)
Anodontites obtusus — Simone (2006)

Glabaris incertus Haas, 1931
‘Simpson in litt.’ Haas, 1931. Senckenbergiana 13: 95.

Anodontites (s.s.) obtusus — Haas (1931)
Anodontites obtusus — Simone (2006)