Hypermastus

Hypermastus is a genus of sea snails, marine gastropod mollusks in the family Eulimidae.

Species
Species within this genus include the following:
 * Hypermastus acutus (G. B. Sowerby I, 1834)
 * Hypermastus araeosomae (Habe, 1992)
 * Hypermastus auritae (Warén, 1991)
 * Hypermastus boschorum (Warén, 1991)
 * Hypermastus bulbulus (Murdoch & Suter, 1906)
 * Hypermastus casta (A. Adams, 1861)
 * Hypermastus colmani (Warén, 1991)
 * Hypermastus coxi (Pilsbry, 1899)
 * Hypermastus cylindricus (Sowerby III, 1900)
 * Hypermastus echinocardiophilus (Habe, 1976)
 * Hypermastus echinodisci (Warén, 1980)
 * Hypermastus epeterion (Melvill, 1889)
 * Hypermastus epiphanes (Melvill, 1897)
 * Hypermastus georgiregis (Cotton & Godfrey, 1932)
 * Hypermastus indistinctus (Thiele, 1925)
 * Hypermastus kilburni (Warén, 1991)
 * Hypermastus lacteus (A. Adams, 1864)
 * Hypermastus mareticola (Warén & Norris, 1994)
 * Hypermastus minor (Warén, 1991)
 * Hypermastus mucronatus (Sowerby II, 1866)
 * Hypermastus obliquistomum (Warén, 1991)
 * Hypermastus orstomi (Warén, 1994)
 * Hypermastus peronellicola (Kuroda & Habe, 1950)
 * Hypermastus philippianus (Dunker, 1860)
 * Hypermastus placentae (Warén & Crossland, 1991)
 * Hypermastus productus (Sowerby III, 1894)
 * Hypermastus pusillus (Sowerby I, 1834)
 * Hypermastus randolphi (Vanatta, 1900)
 * Hypermastus roemerianus Matsuda, Uyeno & Nagasawa, 2013
 * Hypermastus rosa (Willett, 1944)
 * Hypermastus ryukyeunsis (Matsuda, Uyeno & Nagasawa, 2010)
 * Hypermastus sauliae (Warén, 1980)
 * Hypermastus serratus (Warén, 1991)
 * Hypermastus subula (A. Adams, 1864)
 * Hypermastus tenuissimae (Warén, 1991)
 * Hypermastus tokunagai (Yokoyama, 1922)
 * Hypermastus williamsi (Cotton & Godfrey, 1932)


 * Species brought into synonymy:
 * Hypermastus bountyensis (Powell, 1933) : synonym of Pelseneeria bountyensis (Powell, 1933)
 * Hypermastus bulbula (R. Murdoch & Suter, 1906) : synonym of Hypermastus bulbulus (Murdoch & Suter, 1906)
 * Hypermastus cookeanus (Bartsch, 1917) : synonym of Stilapex cookeanus (Bartsch, 1917)
 * Hypermastus dunkerianus (Pilsbry, 1901) : synonym of Hypermastus philippiana (Dunker, 1860)
 * Hypermastus lacteus (A. Adams, 1864) : synonym of Melanella tanabensis Takano, Tanaka & Kano, 2019
 * Hypermastus roemeriana Matsuda, Uyeno & Nagasawa, 2013 a: synonym of Hypermastus roemerianus Matsuda, Uyeno & Nagasawa, 2013