Unio subtrigonus Sowerby, 1867
Sowerby, 1867. Conch. Icon. 16: pl. 58, fig. 292; errata [changed to U. cambojensis Petit’].
(homonym of Unio subtrigonus Noulet, 1864; renamed Unio vagulus Fischer, 1891)
Type(s): HOLOTYPE BMNH_1874-12-11-3, Siam.

Hyriopsis (s.s.) vagulus — Simpson (1900)
Hyriopsis (s.s.) vagula — Simpson (1914)
Pseudodon (Monodontina) cambodjensis — Haas (1920), Haas (1924), Haas (1969)
Pseudodon cambodjensis cambodjensis — Brandt (1974)
Pseudodon cambodjensis — IUCN (2011)
Monodontina cambodjensis — Bolotov et al. (2020)
Pseudodon vagulus — Bolotov et al. (2023)

Unio vagulus Fischer, 1891
Sowerby, 1867. Conch. Icon. 16: pl. 58, fig. 292 [as ‘Unio subtrigonus’].
Fischer, 1891. Bull. Soc. Hist. Nat. Autun 4: 223.
(new name for Unio subtrigonus Sowerby, 1867)

Hyriopsis (s.s.) vagulus — Simpson (1900)
Hyriopsis (s.s.) vagula — Simpson (1914)
Pseudodon (Monodontina) cambodjensis — Haas (1920), Haas (1969)
Pseudodon cambodjensis cambodjensis — Brandt (1974)
Pseudodon cambodjensis — IUCN (2011)
Monodontina cambodjensis — Bolotov et al. (2020)
Pseudodon vagulus — Bolotov et al. (2023), Zieritz et al. (2024), Jeratthitikul et al. (2024), Jeratthitikul et al. (2025)

Pseudodon cambodjensis tenerrimus Brandt, 1974
Brandt, 1974. Arch. Moll. 105: 270, pl. 20, fig. 29.
(intro'd as intra-sp. of Monocondylea cambodjensis Petit de la Saussaye, 1865)

Pseudodon cambodjensis tenerrimus — Brandt (1974)
Monodontina cambodjensis — Bolotov et al. (2020)
Pseudodon vagulus — Bolotov et al. (2023)

Pseudodon cambodjensis Pfeiffer & Graf, 2013
‘Petit’ of Authors.
Pfeiffer & Graf, 2013. J. Moll. Studies 79: 251.
Pfeiffer & Graf, 2015. Zool. J. Linn. Soc. 175(2): 310.
Zieritz et al., 2016. Sci. Total Environ. 571: 1071.
Bolotov et al., 2017. Sci. Repts. 7: Table S1.
Bolotov et al., 2017. Sci. Repts. 7: Table S1 [as ‘Monodontina cambodjensis’].
Lopes-Lima et al., 2017. MPE 106: 177.
Konopleva et al., 2017. Systemat. Biodiv. 15(3): 207.
Bolotov et al., 2018. Sci. Repts. 8: Table S1 [as ‘Monodontina cambodjensis’].
Razak et al., 2018. Conserv. Genet. Resour. 11: 459.
Huang et al., 2019. MPE 130: Table S4 [as ‘Monodontina cambodjensis’].
Konopleva et al., 2019. Sci. Repts. 9: Table S1 [as ‘Monodontina cambodjensis’].
Bolotov et al., 2020. Sci. Repts. 10: Table S1 [as ‘Monodontina cambodiensis’ (sic)].
Konopleva et al., 2021. Sci. Repts. 11: Table S1 [as ‘Monodontina cambodiensis’ (sic)].
Jeratthitikul et al., 2021. Eur. J. Taxonomy 775: 123 [as ‘Monodontina cambodiensis’ (sic)].
Pfeiffer et al., 2021. Invert. Syst. 35: 453 [as ‘Monodontina cambodjensis’].
Wu et al., 2021. ZooKeys 1054: 87 [as ‘Monodontina cambodjensis’].
Wu et al., 2021. J. Lake Sci. 33(6): attached Table 1.
Konopleva et al., 2023. Diversity 15(1), 10: Table S2 [as ‘Monodontina cambodjensis’].
Dai et al., 2023. Invert. Syst. 37(2): Table 1 [as ‘Monodontina cambodjensis’].
Dai et al., 2024. Zoosyst. Evol. 100(4): Table 2.
(misidentified reference to Monocondylea cambodjensis Petit de la Saussaye, 1865)
Type(s): SEQUENCED SPECIMEN UMMZ_304350, Pursat River, just downstream (north) of Highway 5 bridge, Pursat City, Cambodia.

Pseudodon vagulus — Bolotov et al. (2023)