Ptychatractidae

Ptychatractidae is a taxonomic family of sea snails, marine gastropod mollusks in the superfamily Turbinelloidea.

Taxonomy
According to the taxonomy of the Gastropoda by Bouchet & Rocroi (2005), the family Ptychatractidae has no subfamilies.

Genera
Genera in the family Ptychatractidae include:
 * Egestas Finlay, 1926
 * Exilia Conrad, 1860
 * Exilioidea Grant & Gale, 1931
 * Metzgeria Norman, 1879
 * Ptychatractus Stimpson, 1865
 * Latiromitra Locard, 1897 - In 2010 Latiromitra has been found to be closely related to Costellariidae in the molecular phylogeny analysis by Fedosov & Kantor (2010).


 * Genera brought into synonymy:
 * Benthovoluta Kuroda & Habe, 1950: synonym of Exilia Conrad, 1860
 * Chathamidia Dell, 1956: synonym of Exilia Conrad, 1860
 * Cyomesus Quinn, 1981: synonym of Latiromitra Locard, 1897
 * † Graphidula Stephenson, 1941: synonym of Exilia Conrad, 1860
 * Meyeria Dunker & Metzger, 1874: synonym of Metzgeria Norman, 1879
 * Mitraefusus Bellardi, 1873: synonym of Exilia Conrad, 1860
 * Okinawavoluta Noda, 1980: synonym of Latiromitra Locard, 1897
 * † Palaeorhaphis Stewart, 1927 : synonym of Exilia Conrad, 1860
 * Phenacoptygma Dall, 1918: synonym of Exilia Conrad, 1860
 * Surculina Dall, 1908: synonym of Exilia Conrad, 1860
 * † Zexilia Finlay, 1926 : synonym of Exilia Conrad, 1860