Horaiclavidae

Horaiclavidae is a family of predatory sea snails, marine gastropod mollusks in the superfamily Conoidea.

In 2011 this family was split off from the family Pseudomelatomidae (formerly the subfamily Crassispirinae McLean, 1971 ) by Bouchet P., Kantor Yu.I., Sysoev A. & Puillandre N. in their publication "A new operational classification of the Conoidea". It forms a clade together with the family Clavatulidae. It has many characters in common with the family Pseudomelatomidae, except the smaller shell with a low spire, the short siphonal canal and a weak or absent spiral sculpture. The radular formula is 1-0-0-0-1, but some species in this family lack a radula.

Genera
Genera within the family Horaiclavidae include:
 * Anacithara Hedley, 1922
 * Anguloclavus Shuto, 1983
 * Aoteadrillia Powell, 1942
 * Asperosculptura Ardovini, Poppe & Tagaro, 2021
 * Austrocarina Laseron, 1954
 * Austrodrillia Hedley, 1918
 * Buchema Corea, 1934
 * Carinapex Dall, 1924
 * Ceritoturris Dall, 1924
 * Coronacomitas Shuto, 1983
 * Cytharoclavus Kuroda & Oyama in Kuroda, Habe & Oyama, 1971
 * Darrylia García, 2008
 * Epideira Hedley, 1918
 * Graciliclava Shuto, 1983
 * Haedropleura Bucquoy, Dautzenberg & Dollfus, 1883
 * Horaiclavus Oyama, 1954 - type genus
 * Inodrillia Bartsch, 1943 - synonyms: Inodrillara Bartsch, 1943; Inodrillina Bartsch, 1943
 * Inkinga Kilburn, 1988
 * Iwaoa Kuroda, 1940
 * Marshallena Allan, 1927 - synonym: Sugitanitoma Kuroda, 1959
 * Mauidrillia Powell, 1942
 * Micropleurotoma Thiele, 1929
 * Naskia Sysoev & Ivanov, 1985
 * Nquma Kilburn, 1988
 * Paradrillia Makiyama, 1940 - synonyms: Vexitomina Powell, 1942; Alticlavatula MacNeil, 1960
 * Pseudexomilus Powell, 1944
 * Psittacodrillia Kilburn, 1988
 * Striatoguraleus Kilburn, 1994
 * Vexitomina Powell, 1942
 * Genera brought into synonymy:
 * Alticlavatula MacNeil, 1961 : synonym of Paradrillia Makiyama, 1940
 * Inodrillara Bartsch, 1943 : synonym of Inodrillia Bartsch, 1943
 * Inodrillina Bartsch, 1943 : synonym of Inodrillia Bartsch, 1943
 * Regidrillia Powell, 1942 : synonym of Austrodrillia Hedley, 1918
 * Sugitanitoma Kuroda, 1959 : synonym of Marshallena Finlay, 1926