Aethedoris indica Abraham, 1877 accepted as Hexabranchus lacer (Cuvier, 1804)
Albania formosa Collingwood, 1881 accepted as Hexabranchus sanguineus (Rüppell & Leuckart, 1830)
Albania verconis Basedow & Hedley, 1905 accepted as Verconia verconis (Basedow & Hedley, 1905)
Caribranchus morsomus (Ev. Marcus & Er. Marcus, 1962) accepted as Hexabranchus morsomus Ev. Marcus & Er. Marcus, 1962
Heptabranchus burnettii A. Adams, 1848 accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus adamsii Gray, 1850 accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus anaiteus Bergh, 1878 accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus aneiteumensis Abraham, 1877 (uncertain > nomen dubium )
Hexabranchus aureomarginatus Ostergaard, 1955
Hexabranchus cardinalis (A. Gould, 1852) accepted as Hexabranchus sandwichensis J. E. Gray, 1850
Hexabranchus digitatus Eliot, 1906 (uncertain > nomen dubium )
Hexabranchus faustus Bergh, 1878 accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus giganteus Tibiriçá, Pola & Cervera, 2023
Hexabranchus gloriosus (Kelaart, 1858) accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus imperialis (Kent, 1897) (uncertain > nomen dubium )
Hexabranchus lacer (Cuvier, 1804)
Hexabranchus laciniatus [sic] accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus marginatus (Quoy & Gaimard, 1832) accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus mauritiensis Abraham, 1877 (uncertain > nomen dubium )
Hexabranchus morsomus Ev. Marcus & Er. Marcus, 1962
Hexabranchus nebulosus Pease, 1860 accepted as Dendrodoris nigra (W. Stimpson, 1855)
Hexabranchus notatus Bergh, 1878 (uncertain > nomen dubium )
Hexabranchus orbicularis Abraham, 1877 accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus pellucidulus Abraham, 1876 (uncertain > nomen dubium )
Hexabranchus petersi Bergh, 1878 accepted as Hexabranchus sanguineus (Rüppell & Leuckart, 1830)
Hexabranchus plicatus Hägg, 1901 accepted as Hexabranchus sanguineus (Rüppell & Leuckart, 1830)
Hexabranchus praetextus Ehrenberg, 1828 accepted as Hexabranchus sanguineus (Rüppell & Leuckart, 1830)
Hexabranchus pulchellus Pease, 1860 accepted as Hexabranchus sandwichensis J. E. Gray, 1850
Hexabranchus punctatus Bergh, 1905 accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus sandwichensis J. E. Gray, 1850
Hexabranchus sanguineus (Rüppell & Leuckart, 1830)
Hexabranchus sanguinolentus A. Adams, 1848 (unaccepted > nomen nudum )
Hexabranchus suezensis Abraham, 1876 accepted as Hexabranchus sanguineus (Rüppell & Leuckart, 1830)
Hexabranchus sumptuosa (A. Gould, 1852) accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus superba (A. Gould, 1852) accepted as Hexabranchus lacer (Cuvier, 1804)
Hexabranchus tinkeri Ostergaard, 1955 accepted as Hexabranchus sandwichensis J. E. Gray, 1850