Unio depressus Reeve, 1864
‘Lamarck’ Reeve, 1864. Conch. Icon. 16: pl. 18, sp. 81.
(misidentified reference to Unio depressa Lamarck, 1819)

Diplodon (Hyridella s.s.) australis var. legrandi — Simpson (1900), Simpson (1914)
Velesunio legrandi — McMichael & Hiscock (1958)

Unio moretonicus Reeve, 1865
Reeve, 1865. Conch. Icon. 16: pl. 24, sp. 118.
Type(s): FIGURED SYNTYPE BMNH_1958-5-16-1, Moreton Bay, Australia.

Diplodon (Hyridella s.s.) moretonicus — Simpson (1900), Simpson (1914)
Velesunio shuttleworthi — Iredale (1934), Iredale (1943)
Velesunio moretonicus — McMichael & Hiscock (1958), Haas (1969), B.J. Smith (1992), Walker et al. (2001), Graf & Cummings (2007), Bogan (2010), Walker et al. (2014), IUCN (2014), Graf & Cummings (2021)

Unio legrandi Petterd, 1889
Petterd, 1889. Pap. Roy. Soc. Tasmania 1889: 81.
Johnston, 1889. unknown publication: 95-96, pl. 1, figs. 6-8, 10; pl. 2, figs. 11, 13-16a.
Type(s): HOLOTYPE AMS_12905, South Esk River, Tasmania, Australia [-41.783, 147.7 ± 100 km].

Diplodon (Hyridella s.s.) australis var. legrandi — Simpson (1900), Simpson (1914)
Velesunio shuttleworthi — Iredale (1934), Iredale (1943)
Velesunio legrandi — McMichael & Hiscock (1958), Haas (1969), Kongim et al. (2015)
Velesunio moretonicus — B.J. Smith (1992), Walker et al. (2001)

Diplodon australis May, 1921
‘(Lamarck)’ May, 1921. unknown publication: 21.
May, 1923. unknown publication: pl. 9, fig. 11.
(misidentified reference to Unio australis Lamarck, 1819)

Velesunio shuttleworthi — Iredale (1934)
Velesunio legrandi — McMichael & Hiscock (1958)

Velesunio shuttleworthi Iredale, 1934
‘(Kuster)’ Iredale, 1934. Austral. Zool. 8: 60, pl. 3, fig. 5; pl. 4, fig. 5.
‘Kuster’ Iredale, 1943. Austral. Zool. 10: 190.
(misidentified reference to Unio shuttleworthi Küster, 1856)

Velesunio legrandi — McMichael & Hiscock (1958)

Margaron (Unio) mortonicus Lea, 1870
‘Reeve’ Lea, 1870. Synopsis Fam. Naiades: 43.
(error for Unio moretonicus Reeve, 1865)

Diplodon (Hyridella s.s.) moretonicus — Simpson (1900), Simpson (1914)