Hemisinidae

Hemisinidae is a family of snails in the superfamily Cerithioidea. They occur in freshwater and brackish environments on all continents except Australia and Antarctica.

Genera
There are five extant genera:
 * Aylacostoma Spix, 1827
 * Cubaedomus Thiele, 1928
 * Hemisinus Swainson, 1840
 * Longiverena Pilsbry & Olsson, 1935
 * Pachymelania E. A. Smith, 1893

There are also four genera only known from fossils:
 * † Axonella Pacaud, Lhomme & Renaud, 2021
 * † Gantmelania Kowalke, 2001
 * † Pyrgulifera Meek, 1871
 * † Stephaniphera S. Schneider, Kollmann & Pickford, 2020