Sphyradium

Sphyradium is a genus of very small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Orculidae within the superfamily Pupilloidea.

Species
Species within the genus Sphyradium include:
 * Sphyradium doliolum (Bruguière, 1792)
 * Synonyms:
 * Sphyradium alexanderi Pilsbry & C. M. Cooke, 1906 : synonym of Columella alexanderi (Pilsbry & C. M. Cooke, 1906) (original combination)
 * Sphyradium dobrogicum Grossu, 1986 : synonym of Sphyradium doliolum (Bruguière, 1792) (junior synonym)
 * Sphyradium hasta Hanna, 1911 : synonym of Columella hasta (Hanna, 1911)
 * Sphyradium himalayanum (Benson, 1863) : synonym of Truncatellina himalayana (Benson, 1863) (unaccepted combination)
 * Sphyradium parreyssii (L. Pfeiffer, 1848) : synonym of Agardhiella parreyssii (L. Pfeiffer, 1848) (superseded combination)
 * Sphyradium sharpi Pilsbry & C. M. Cooke, 1906 : synonym of Columella sharpi (Pilsbry & C. M. Cooke, 1906) (original combination)