Ammotheidae
Ammotheidae is a family of sea spiders. It is the most diverse sea spider family, with 297 species described in more than 20 genera, of which only Nymphopsis and Sericosura have been found to be monophyletic. Despite this internal taxonomic uncertainty, studies of 18S rRNA support the monophyly of the family, and its subdivision into two subfamilies, Achelinae and Ammotheinae.
Genera
The family Ammotheidae comprises the following genera:Achelia Hodge, 1864Acheliana Arnaud, 1971Ammothea Leach, 1814Ammothella Verrill, 1900Austroraptus Hodgson, 1907Biammothea Pushkin, 1993Cilunculus Loman, 1908Dromedopycnon Child, 1982Elassorhis Child, 1982Hedgpethius Child, 1974Hemichela Stock, 1954Megarhethus Child, 1982Nymphopsis Haswell, 1885Oorhynchus Hoek, 1881Paranymphon Caullery, 1896Proboehmia Stock, 1991Prototrygaeus Stock, 1975Scipiolus Loman, 1908Sericosura Fry & Hedgpeth, 1969Tanystylum Miers, 1879