Melongenidae

The Melongenidae, the crown conchs and their relatives, are a taxonomic family of large to very large marine gastropods in the superfamily Buccinoidea.

Taxonomy
For a while prior to 2004, the genera Busycon and Busycotypus were placed in the Melongenidae. Then, in 2004, based on their digestive systems and on cladistic analysis by Kosyan & Kantor (2004), these two genera were moved to the family Busyconidae within the superfamily Buccinoidea.

According to the taxonomy of the Gastropoda by Bouchet & Rocroi (2005), the Melongenidae consists of two subfamilies:
 * Subfamily Melongeninae Gill, 1871 (1854) - synonyms: Cassidulidae Gray, 1854 (inv.); Galeodidae Thiele, 1925 (inv.); Volemidae Winckworth, 1945; Heligmotomidae Adegoke, 1977
 * Subfamily Echinofulgurinae Petuch, 1994

Genera
Genera in the family Melongenidae include:
 * Brunneifusus Dekkers, 2018
 * Hemifusus Swainson, 1840
 * Lenifusus Dekkers, 2018
 * Melongena Schumacher, 1817 - crown conchs
 * Pugilina Schumacher, 1817
 * Saginafusus Wenz, 1943
 * † Sycostoma Cox, 1931
 * Taphon H. Adams & A. Adams, 1853
 * Volegalea Iredale, 1938
 * Volema Röding, 1798
 * Genera brought into synonymy:
 * Cassidulus Gray, 1854 : synonym of Pugilina Schumacher, 1817
 * Galeodes Röding, 1798 : synonym of Melongena Schumacher, 1817
 * Semifusus Agassiz, 1846 synonym of Hemifusus Swainson, 1840
 * Thalessa H. Adams & A. Adams, 1853 : synonym of Volema Röding, 1798