Genus Mactresia J. E. Gray, 1840 [W. E. Leach in J. E. Gray, 1840]

(3-4-3-2-1-1-2-19-0-0-0-0-0)
[=Martesia G. B. Sowerby, 1824]
Ref. Vaught, 1989 p 138
Syn. Mactesia J. E. Gray, 1852
Ref. Vokes, 1980 p 189