Ammotheidae

Ammotheidae is the most diversified group of the class Pycnogonida, with 297 species described in more than 20 genera, of which only Nymphopsis and Sericosura were found to be monophyletic. Despite its internal taxonomic uncertainty, studies on 18S rRNA supports its monophyly, and the subdivision on Achelinae and Ammotheinae subfamilies.

Genera
The family Ammotheidae comprises the following subfamilies:


 * Achelia Hodge, 1864
 * Acheliana Arnaud, 1971
 * Ammothea Leach, 1814
 * Ammothella Verrill, 1900
 * Austroraptus Hodgson, 1907
 * Biammothea Pushkin, 1993
 * Cilunculus Loman, 1908
 * Dromedopycnon Child, 1982
 * Elassorhis Child, 1982
 * Hedgpethius Child, 1974
 * Hemichela Stock, 1954
 * Megarhethus Child, 1982
 * Nymphopsis Haswell, 1885
 * Oorhynchus Hoek, 1881
 * Paranymphon Caullery, 1896
 * Proboehmia Stock, 1991
 * Prototrygaeus Stock, 1975
 * Scipiolus Loman, 1908
 * Sericosura Fry & Hedgpeth, 1969
 * Tanystylum Miers, 1879
 * Teratonotum Sabroux, Corbari, Krapp, Bonillo, Le Prieur & Hassanin, 2017
 * Trygaeus Dohrn, 1881
 * Pariboea Philippi, 1843
 * Pasithoe Goodsir, 1842